CVE-2022-26850: Apache NiFi Security Reports

NiFi Security Vulnerability Disclosure

Apache NiFi welcomes the responsible reporting of security vulnerabilities. The NiFi team believes that working with skilled security researchers across the globe is crucial in identifying weaknesses in any technology. If you believe you’ve found a security issue in our product or service, we encourage you to notify us. We will work with you to resolve the issue promptly.

Disclosure Policy

• Let us know as soon as possible upon discovery of a potential security issue, and we’ll make every effort to quickly resolve the issue.

• Provide us a reasonable amount of time to resolve the issue before any disclosure to the public or a third-party.

• Make a good faith effort to avoid privacy violations, destruction of data, and interruption or degradation of our service. Only interact with accounts you own or with explicit permission of the account holder.

• Please read the Apache Project Security for Committers policy to understand the restrictions around disclosure of security issues in the Apache open source community.

  Specifically, please do not:

  • ⛔️ Open a Jira disclosing a security vulnerability to the public
  • ⛔️ Send a message to the [email protected] or [email protected] mailing lists disclosing a security vulnerability to the public
  • ⛔️ Send a message to the Apache NiFi Slack instance disclosing a security vulnerability to the public

Exclusions

While researching, we’d like to ask you to refrain from:

• Denial of service
• Spamming
• Social engineering (including phishing) of Apache NiFi staff or contractors
• Any physical attempts against Apache NiFi property or data centers

Reporting Methods

NiFi accepts reports in multiple ways:

• NiFi Security Mailing List: [email protected]. Members of the Project Management Committee monitor this private mailing list and respond to disclosures.
• NiFi has a HackerOne project page. HackerOne provides a triaged process for researchers and organizations to collaboratively report and resolve security vulnerabilities.

Thank you for helping keep Apache NiFi and our users safe!

CVE-2022-26850: Apache NiFi insufficiently protected credentials

Severity: Low

Versions Affected:

• Apache NiFi 1.14.0 - 1.15.3

Description: When creating or updating credentials for single-user access, NiFi wrote a copy of the Login Identity Providers configuration to the operating system temporary directory. The Login Identity Providers configuration file contains the username and a bcrypt hash of the configured password. On most platforms, the operating system temporary directory has global read permissions. NiFi immediately moved the temporary file to the final configuration directory, which significantly limited the window of opportunity for access.

Bcrypt is a password-hashing algorithm that incorporates a random salt and a specified cost factor, designed to maintain resistance to brute-force attacks. Use of the bcrypt algorithm minimizes the impact of disclosing the single-user credentials stored in Login Identity Providers.

Mitigation: NiFi 1.16.0 includes updates to replace the Login Identity Providers configuration without writing a file to the operating system temporary directory.

Credit: This issue was discovered by Jonathan Leitschuh (https://twitter.com/jlleitschuh). Report available here: JLLeitschuh Github

CVE Link: Mitre Database: CVE-2022-26850

NiFi Jira: NIFI-9785

NiFi PR: PR 5856

Released: March 27, 2022

CVE-2021-42392: Apache NiFi’s use of H2 database

Severity: Important

Versions Affected:

• Apache NiFi 0.0.1 - 1.15.3

Description: Apache NiFi uses H2 database for storing various NiFi runtime details. H2 database had a critical vulnerability similar to Log4Shell which potentially allows JNDI remote codebase loading. In NiFi, by default, console access to the database is restricted to local machine access only and remote access is disabled which limited the severity of this vulnerability. More detailed information on the H2 vulnerability can be found in this blog post.

Mitigation: We have upgraded the H2 version that NiFi uses from 1.4.199 to 2.1.210. The vulnerability is also mitigated with more recent versions of Java (6u211 , 7u201, 8u191, 11.0.1 onwards).

CVE Link: Mitre Database: CVE-2021-42392

NiFi Jira: NIFI-9585

Released: March 27, 2022

CVE-2021-44145: Apache NiFi information disclosure by XXE in TransformXML

Severity: Low

Versions Affected:

• Apache NiFi 0.1.0 - 1.15.0

Description: In the TransformXML processor, an authenticated user could configure an XSLT file which, if it included malicious external entity calls, may reveal sensitive information.

Mitigation: The 'Secure processing' property will now apply to the configured XSLT file as well as flow files being transformed. Users running any previous NiFi release should upgrade to the latest release.

Credit: This issue was discovered by DangKhai at Viettel Cyber Security.

CVE Link: Mitre Database: CVE-2021-44145

NiFi Jira: NIFI-9399

NiFi PR: PR 5542

Released: December 15, 2021

CVE-2020-27218: Apache NiFi’s use of Jetty server

Severity: Low

Versions Affected:

• Apache NiFi 1.2.0 - 1.12.1

Description: The Jetty server dependency had a HTTP Request Smuggling vulnerability. See NIST NVD CVE-2020-27218 for more information.

Mitigation: Jetty server was upgraded from 9.4.26.v20200117 to 9.4.35.v20201120 for the Apache NiFi 1.13.0 release.

CVE Link: Mitre Database: CVE-2020-27218

NiFi Jira: NIFI-8098

NiFi PR: PR 4731

Released: February 16, 2021

CVE-2021-20190: Apache NiFi’s jackson-databind usage

Severity: Low

Versions Affected:

• Apache 1.7.0 - 1.12.1

Description: The com.fasterxml.jackson.core:jackson-databind dependency had various serialization vulnerabilities. See NIST NVD CVE-2021-20190 for more information.

Mitigation: jackson-databind was upgraded from 2.9.10.5 to 2.9.10.8 for the Apache NiFi 1.13.0 release.

CVE Link: Mitre Database: CVE-2021-20190

NiFi Jira: NIFI-8166

NiFi PR: PR 4777

Released: February 16, 2021

CVE-2020-9486: Apache NiFi information disclosure in logs

Severity: Important

Versions Affected:

• Apache NiFi 1.10.0 - 1.11.4

Description: The NiFi stateless execution engine produced log output which included sensitive property values. When a flow was triggered, the flow definition configuration JSON was printed, potentially containing sensitive values in plaintext.

Mitigation: Implemented Argon2 secure hashing to provide a deterministic loggable value which does not reveal the sensitive value. Users running any previous NiFi release should upgrade to the latest release.

Credit: This issue was discovered by Andy LoPresto and Pierre Villard.

CVE Link: Mitre Database: CVE-2020-9486

NiFi Jira: NIFI-7377

NiFi PR: PR 4222

Released: August 18, 2020

CVE-2020-9487: Apache NiFi denial of service

Severity: Important

Versions Affected:

• Apache NiFi 1.0.0 - 1.11.4

Description: The NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.

Mitigation: Disabled anonymous authentication, implemented a multi-indexed cache, and limited token creation requests to one concurrent request per user. Users running any previous NiFi release should upgrade to the latest release.

Credit: This issue was discovered by Dennis Detering (IT Security Consultant at Spike Reply).

CVE Link: Mitre Database: CVE-2020-9487

NiFi Jira: NIFI-7385

NiFi PR: PR 4271

Released: August 18, 2020

CVE-2020-9491: Apache NiFi use of weak TLS protocols

Severity: Critical

Versions Affected:

• Apache NiFi 1.2.0 - 1.11.4

Description: The NiFi UI and API were protected by mandating TLS v1.2, as well as listening connections established by processors like ListenHTTP, HandleHttpRequest, etc. However intracluster communication such as cluster request replication, Site-to-Site, and load balanced queues continued to support TLS v1.0 or v1.1.

Mitigation: Refactored disparate internal SSL and TLS code, reducing exposure for extension and framework developers to low-level primitives. Added support for TLS v1.3 on supporting JVMs. Restricted all incoming TLS communications to TLS v1.2+. Users running any previous NiFi release should upgrade to the latest release.

Credit: This issue was discovered by Juan Carlos Sequeiros and Andy LoPresto.

CVE Link: Mitre Database: CVE-2020-9491

NiFi Jira: NIFI-7407

NiFi PR: PR 4263

Released: August 18, 2020

CVE-2020-13940: Apache NiFi information disclosure by XXE

Severity: Low

Versions Affected:

• Apache NiFi 1.0.0 - 1.11.4

Description: The notification service manager and various policy authorizer and user group provider objects allowed trusted administrators to inadvertently configure a potentially malicious XML file. The XML file has the ability to make external calls to services (via XXE).

Mitigation: An XML validator was introduced to prevent malicious code from being parsed and executed. Users running any previous NiFi release should upgrade to the latest release.

Credit: This issue was discovered by Matt Burgess and Andy LoPresto.

CVE Link: Mitre Database: CVE-2020-13940

NiFi Jira: NIFI-7680

NiFi PR: PR 4436

Released: August 18, 2020

CVE-2019-9658: Apache NiFi’s checkstyle usage

Severity: Low

Versions Affected:

• Apache NiFi 1.8.0 - 1.11.4

Description: The com.puppycrawl.tools:checkstyle dependency had a XXE vulnerability. See NIST NVD CVE-2019-9658 for more information.

Mitigation: checkstyle was upgraded from 8.28 to 8.29 for the Apache NiFi 1.12.0 release.

CVE Link: Mitre Database: CVE-2019-9658

NiFi Jira: NIFI-7108

NiFi PR: PR 4041

Released: August 18, 2020

CVE-2019-12086: Apache NiFi’s jackson-databind usage

Severity: Low

Versions Affected:

• Apache NiFi 1.8.0 - 1.11.4

Description: The com.fasterxml.jackson.core:jackson-databind dependency had a polymorphic typing vulnerability which exposed some MySQL server access to an attacker. See NIST NVD CVE-2019-12086 for more information.

Mitigation: jackson-databind was upgraded from 2.9.10.1 to 2.9.10.5 for the Apache NiFi 1.12.0 release.

CVE Link: Mitre Database: CVE-2019-12086

NiFi Jira: NIFI-7542

NiFi PR: PR 4362

Released: August 18, 2020

CVE-2020-7676: Apache NiFi’s angular.js usage

Severity: Low

Versions Affected:

• Apache NiFi 1.8.0 - 1.11.4

Description: The angular.js dependency had an XSS vulnerability. See NIST NVD CVE-2020-7676-9658 for more information.

Mitigation: angular.js was upgraded from 1.7.9 to 1.8.0 for the Apache NiFi 1.12.0 release.

CVE Link: Mitre Database: CVE-2020-7676

NiFi Jira: NIFI-7577

NiFi PR: PR 4357

Released: August 18, 2020

CVE-2020-11023: Apache NiFi’s jquery usage

Severity: Low

Versions Affected:

• Apache NiFi 1.8.0 - 1.11.4

Description: The jquery dependency had an XSS vulnerability. See NIST NVD CVE-2020-11023 for more information.

Mitigation: jquery was upgraded from 3.4.1 to 3.5.1 for the Apache NiFi 1.12.0 release.

CVE Link: Mitre Database: CVE-2020-11023

NiFi Jira: NIFI-7423

NiFi PR: PR 4258

Released: August 18, 2020

CVE-2020-5398: Apache NiFi’s spring-data-redis usage

Severity: Moderate

Versions Affected:

• Apache NiFi 1.8.0 - 1.11.3

Description: The org.springframework.data:spring-data-redis dependency in the nifi-redis-bundle had a vulnerable transitive dependency. See NIST NVD CVE-2020-5398 for more information.

Mitigation: spring-data-redis was upgraded from 2.1.0.RELEASE to 2.1.16.RELEASE for the Apache NiFi 1.11.4 release. It is unlikely that NiFi’s usage of this dependency could be exploited as described by the CVE, however we consider it prudent for users running a prior 1.x release to upgrade to the 1.11.4 release.

CVE Link: Mitre Database: CVE-2020-5398

NiFi Jira: NIFI-7267

NiFi PR: PR 4150

Released: March 22, 2020

CVE-2020-1942: Apache NiFi information disclosure in logs

Severity: Important

Versions Affected:

• Apache NiFi 0.0.1 - 1.11.0

Description: The flow fingerprint factory generated flow fingerprints which included sensitive property descriptor values. In the event a node attempted to join a cluster and the cluster flow was not inheritable, the flow fingerprint of both the cluster and local flow was printed, potentially containing sensitive values in plaintext.

Mitigation: Implemented Argon2 secure hashing to provide a deterministic loggable value which does not reveal the sensitive value. Users running any previous NiFi release should upgrade to the latest release.

Credit: This issue was discovered by Andy LoPresto.

CVE Link: Mitre Database: CVE-2020-1942

NiFi Jira: NIFI-7079

NiFi PR: PR 4208

Released: February 4, 2020

CVE-2020-1928: Apache NiFi information disclosure in logs

Severity: Moderate

Versions Affected:

• Apache NiFi 1.10.0

Description: The sensitive parameter parser would log parsed property descriptor values for debugging purposes. This would expose literal values entered in a sensitive property when no parameter was present.

Mitigation: Removed debug logging from the class. Users running the 1.10.0 release should upgrade to the latest release.

Credit: This issue was discovered by Andy LoPresto.

CVE Link: Mitre Database: CVE-2020-1928

NiFi Jira: NIFI-6948

NiFi PR: PR 3935

Released: January 22, 2020

CVE-2020-1933: Apache NiFi XSS attack

Severity: Important

Versions Affected:

• Apache NiFi 1.0.0 - 1.10.0

Description: Malicious scripts could be injected to the UI through action by an unaware authenticated user in Firefox. Did not appear to occur in other browsers.

Mitigation: Sanitization of the error response ensures the XSS would not be executed. Users running a prior 1.x release should upgrade to the latest release.

Credit: This issue was discovered by Jakub Palaczynski (ING Tech Poland).

CVE Link: Mitre Database: CVE-2020-1933

NiFi Jira: NIFI-7023

NiFi PR: PR 3991

Released: January 22, 2020

CVE-2019-10768: Apache NiFi’s AngularJS usage

Severity: Important

Versions Affected:

• Apache NiFi 1.8.0 - 1.10.0

Description: An Object.prototype pollution vulnerability existed within the AngularJS dependency used by NiFi. See NIST NVD CVE-2019-10768 for more information.

Mitigation: AngularJS was upgraded from 1.7.2 to 1.7.9 for the Apache NiFi 1.11.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was identified by Pierre Villard.

CVE Link: Mitre Database: CVE-2019-10768

NiFi Jira: NIFI-6893

NiFi PR: PR 3899

Released: January 22, 2020

CVE-2019-10080: Apache NiFi information disclosure by XXE

Severity: Low

Versions Affected:

• Apache NiFi 1.3.0 - 1.9.2

Description: The XMLFileLookupService allowed trusted users to inadvertently configure a potentially malicious XML file. The XML file has the ability to make external calls to services (via XXE) and reveal information such as the versions of Java, Jersey, and Apache that the NiFI instance uses.

Mitigation: A validator to ensure the XML file is not malicious was applied on the Apache NiFi 1.10.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by RunningSnail.

CVE Link: Mitre Database: CVE-2019-10080

NiFi Jira: NIFI-6301

NiFi PR: PR 3507

Released: November 4, 2019

CVE-2019-12421: Apache NiFi user log out issue

Severity: Moderate

Versions Affected:

• Apache NiFi 1.0.0 - 1.9.2

Description: If NiFi uses an authentication mechanism other than PKI, when the user clicks Log Out, NiFi invalidates the authentication token on the client side but not on the server side. This permits the user’s client-side token to be used for up to 12 hours after logging out to make API requests to NiFi.

Mitigation: The fix to invalidate the server-side authentication token immediately after the user clicks ‘Log Out’ was applied on the Apache NiFi 1.10.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Abdu Sahin.

CVE Link: Mitre Database: CVE-2019-12421

NiFi Jira: NIFI-6085

NiFi PR: PR 3362

Released: November 4, 2019

CVE-2019-10083: Apache NiFi process group information disclosure

Severity: Low

Versions Affected:

• Apache NiFi 1.3.0 - 1.9.2

Description: When updating a Process Group via the API, the response to the request includes all of its contents (at the top most level, not recursively). The response included details about processors and controller services which the user may not have had read access to.

Mitigation: Requests to update or remove the process group will no longer return the contents of the process group in the response in Apache NiFi 1.10.0. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Mark Payne.

CVE Link: Mitre Database: CVE-2019-100833

NiFi Jira: NIFI-6302

NiFi PR: PR 3477, PR 3487

Released: November 4, 2019

CVE-2019-16335, CVE-2019-14540, CVE-2019-14439, CVE-2019-12814, CVE-2019-12384, CVE-2019-12086, CVE-2018-1000873, CVE-2018-19362, CVE-2018-19361, CVE-2018-19360: Apache NiFi’s Jackson Core Databind usage

Severity: Medium

Versions Affected:

• Apache NiFi 1.0.0 - 1.9.2

Description: Various vulnerabilities existed within the Jackson Core: Databind dependency used by NiFi. See NIST NVD CVE-2019-16335, NIST NVD CVE-2019-14540, NIST NVD CVE-2019-14439, NIST NVD CVE-2019-12814, NIST NVD CVE-2019-12384, NIST NVD CVE-2019-12086, NIST NVD CVE-2018-1000873, NIST NVD CVE-2018-19362, NIST NVD CVE-2018-19361, NIST NVD CVE-2018-19360 for more information.

Mitigation: The fix to upgrade the jackson-databind dependency from 2.9.7 to 2.9.10 was applied on the Apache NiFi 1.10.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was identified by Pierre Villard and Nathan Gough.

CVE Link: Mitre Database: CVE-2019-16335, Mitre Database: CVE-2019-14540, Mitre Database: CVE-2019-14439, Mitre Database: CVE-2019-12814, Mitre Database: CVE-2019-12384, Mitre Database: CVE-2019-12086, Mitre Database: CVE-2018-1000873, Mitre Database: CVE-2018-19362, Mitre Database: CVE-2018-19361, Mitre Database: CVE-2018-19360

NiFi Jira: NIFI-6709

NiFi PR: PR 3765

Released: November 4, 2019

CVE-2019-10247, CVE-2019-10246: Apache NiFi’s Jetty usage

Severity: Medium

Versions Affected:

• Apache NiFi 1.8.0 - 1.9.2

Description: Various vulnerabilities existed within the Jetty dependency used by NiFi. See NIST NVD CVE-2019-10247, NIST NVD CVE-2019-10246 for more information.

Mitigation: The fix to upgrade the Jetty dependency from 9.4.11.v20180605 to 9.4.19.v20190610 was applied on the Apache NiFi 1.10.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was identified by Jeff Storck and Nathan Gough.

CVE Link: Mitre Database: CVE-2019-10247, Mitre Database: CVE-2019-10246

NiFi Jira: NIFI-6330

NiFi PR: PR 3534

Released: November 4, 2019

CVE-2019-11358: Apache NiFi’s JQuery usage

Severity: Medium

Versions Affected:

• Apache NiFi 1.6.0 - 1.9.2

Description: Various vulnerabilities existed within the JQuery dependency used by NiFi. See NIST NVD CVE-2019-11358 for more information.

Mitigation: The fix to upgrade the JQuery dependency from 3.1.1 to 3.4.1 was applied on the Apache NiFi 1.10.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was identified by Matt Gilman and Rob Fellows.

CVE Link: Mitre Database: CVE-2019-11358

NiFi Jira: NIFI-6316

NiFi PR: PR 3489

Released: November 4, 2019

CVE-2018-17192: Apache NiFi clickjacking vulnerability

Severity: Low

Versions Affected:

• Apache NiFi 1.0.0 - 1.6.0

Description: The X-Frame-Options headers were applied inconsistently on some HTTP responses, resulting in duplicate or missing security headers. Some browsers would interpret these results incorrectly, allowing clickjacking attacks.

Mitigation: The fix to consistently apply the security headers was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Suchithra V N.

CVE Link: Mitre Database: CVE-2018-17192

NiFi Jira: NIFI-5258

NiFi PR: PR 2759, PR 2791, PR 2812

Released: October 26, 2018

CVE-2018-17193: Apache NiFi reflected XSS attack in X-ProxyContextPath

Severity: Moderate

Versions Affected:

• Apache NiFi 1.0.0 - 1.7.1

Description: The message-page.jsp error page used the value of the HTTP request header X-ProxyContextPath without sanitization, resulting in a reflected XSS attack.

Mitigation: The fix to correctly parse and sanitize the request attribute value was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Dan Fike. Additional assistance from Patrick White.

CVE Link: Mitre Database: CVE-2018-17193

NiFi Jira: NIFI-5442

NiFi PR: PR 2908

Released: October 26, 2018

CVE-2018-17194: Apache NiFi Denial of service via DELETE cluster request replication

Severity: Moderate

Versions Affected:

• Apache NiFi 1.0.0 - 1.7.1

Description: When a client request to a cluster node was replicated to other nodes in the cluster for verification, the Content-Length was forwarded. On a DELETE request, the body was ignored, but if the initial request had a Content-Length value other than 0, the receiving nodes would wait for the body and eventually timeout.

Mitigation: The fix to check DELETE requests and overwrite non-zero Content-Length header values was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Mike Cole and Andy LoPresto.

CVE Link: Mitre Database: CVE-2018-17194

NiFi Jira: NIFI-5628

NiFi PR: PR 3035

Released: October 26, 2018

CVE-2018-17195: Apache NiFi CSRF vulnerability in template upload API

Severity: Critical

Versions Affected:

• Apache NiFi 1.0.0 - 1.7.1

Description: The template upload API endpoint accepted requests from different domain when sent in conjunction with ARP spoofing + meddler in the middle (MITM) attack, resulting in a CSRF attack. The required attack vector is complex, requiring a scenario with client certificate authentication, same subnet access, and injecting malicious code into an unprotected (plaintext HTTP) website which the targeted user later visits, but the possible damage warranted a Critical severity level.

Mitigation: The fix to apply Cross-Origin Resource Sharing (CORS) policy request filtering was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Mike Cole.

CVE Link: Mitre Database: CVE-2018-17195

NiFi Jira: NIFI-5595

NiFi PR: PR 3024

Released: October 26, 2018

CVE-2014-0193: Apache NiFi Denial of service because of netty vulnerability

Severity: Low

Versions Affected:

• Apache NiFi 1.0.0 - 1.7.1

Description: A vulnerability in the netty library could cause denial of service. See NIST NVD CVE-2014-0193 or netty release announcement for more information.

Mitigation: The fix to upgrade the netty library to 3.7.1.Final was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Nathan Gough.

CVE Link: Mitre Database: CVE-2014-0193

NiFi Jira: NIFI-5665

NiFi PR: PR 3067

Released: October 26, 2018

NIFI-2018-006: Apache NiFi Suppression of stack trace when malicious XSS query is submitted

Severity: Informational

Versions Affected:

• Apache NiFi 1.0.0 - 1.7.0

Description: A reporter submitted a (false positive) claim of a reflected XSS attack. See the CVE-2016-8748 announcement for more information. While the XSS attack was not valid, the resulting stack trace contained unnecessary information.

Mitigation: The fix to suppress the stacktrace was applied on the Apache NiFi 1.7.1 and 1.8.0 releases. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Prashanth V.

CVE Link: N/A

NiFi Jira: NIFI-5374

NiFi PR: PR 2840

Released: October 26, 2018

NIFI-2018-014: Apache NiFi addition of Content Security Policy (CSP) frame-ancestor HTTP response header

Severity: Informational

Versions Affected:

• Apache NiFi 1.0.0 - 1.7.1

Description: Following best practice recommendations, the frame-ancestors CSP response header is provided as well as X-Frame-Options for increased compatibility across browsers.

Mitigation: The addition of these headers was applied on the Apache NiFi 1.8.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Nathan Gough and Andy LoPresto.

CVE Link: N/A

NiFi Jira: NIFI-5366

NiFi PR: PR 2989

Released: October 26, 2018

CVE-2018-1324: Apache NiFi Denial of service issue because of commons-compress vulnerability

Severity: Low

Versions Affected:

• Apache NiFi 0.1.0 - 1.6.0

Description: A vulnerability in the commons-compress library could cause denial of service. See commons-compress CVE-2018-1324 announcement for more information.

Mitigation: The fix to upgrade the commons-compress library to 1.16.1 was applied on the Apache NiFi 1.7.0 release. Users running a prior 1.x release should upgrade to the appropriate release. This was previously incorrectly reported as being fixed in Apache NiFi 1.6.0

Credit: This issue was discovered by Joe Witt.

CVE Link: Mitre Database: CVE-2018-1324

NiFi Jira: NIFI-5108

NiFi PR: PR 2651

Released: June 25, 2018

CVE-2016-1000031: Apache NiFi dependency vulnerability in commons-fileupload

Severity: Moderate

Versions Affected:

• Apache NiFi 0.1.0 - 1.6.0

Description: A vulnerability in the commons-fileupload library could cause remote code execution (RCE). See Tenable Research Advisory TRA-2016-30 for more information.

Mitigation: The fix to upgrade the commons-fileupload library to 1.3.3 was applied on the Apache NiFi 1.7.0 release. Users running a prior 1.x release should upgrade to the appropriate release. Apache Commons project contests validity of this vulnerability and proposes this is the responsibility of the consuming application.

Credit: This issue was discovered by Matt Gilman.

CVE Link: Mitre Database: CVE-2016-1000031

NiFi Jira: NIFI-5124

NiFi PR: PR 2662

Released: June 25, 2018

CVE-2018-7489, CVE-2017-7525, and CVE-2017-15095: Apache NiFi dependency vulnerability in FasterXML Jackson

Severity: Critical

Versions Affected:

• Apache NiFi 0.1.0 - 1.6.0

Description: A vulnerability in the FasterXML Jackson XML parsing library could allow unauthenticated remote code execution (RCE). See NVD CVE-2018-7489 for more information.

Mitigation: The fix to upgrade the jackson-databind library to 2.9.5 was applied on the Apache NiFi 1.7.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Sivaprasanna Sethuraman.

CVE Link: Mitre Database: CVE-2018-7489, Mitre Database: CVE-2017-7525, Mitre Database: CVE-2017-15095

NiFi Jira: NIFI-5286

NiFi PR: PR 2775

Released: June 25, 2018

angular:20171018 and angular:20180202: Apache NiFi dependency XSS vulnerability in AngularJS

Severity: Moderate

Versions Affected:

• Apache NiFi 0.1.0 - 1.6.0

Description: A vulnerability in the AngularJS library could allow XSS. See Snyk npm:angular:20171018 and Snyk npm:angular:20180202 for more information.

Mitigation: The fix to upgrade the commons-compress library to 1.7.0 was applied on the Apache NiFi 1.7.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Prashanth V.

CVE Link: N/A

NiFi Jira: NIFI-5215

NiFi PR: PR 2721

Released: June 25, 2018

NIFI-2018-009: Apache NiFi proactive escaping of batch ingest JSON to Elasticsearch to prevent injection attack

Severity: Low

Versions Affected:

• Apache NiFi 0.1.0 - 1.6.0

Description: While no published attack exists, NiFi strengthened the security around the batch processing Elasticsearch ingest feature to prevent injection attacks.

Mitigation: The improved content escaping was applied on the Apache NiFi 1.7.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Jonathan Logan.

CVE Link: N/A

NiFi Jira: NIFI-5266

NiFi PR: PR 2760

Released: June 25, 2018

CVE-2018-1309: Apache NiFi XML External Entity issue in SplitXML processor

Severity: Moderate

Versions Affected:

• Apache NiFi 0.1.0 - 1.5.0

Description: Malicious XML content could cause information disclosure or remote code execution.

Mitigation: The fix to disable external general entity parsing and disallow doctype declarations was applied on the Apache NiFi 1.6.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by 圆珠笔.

CVE Link: Mitre Database: CVE-2018-1309

Released: April 8, 2018

CVE-2018-1310: Apache NiFi JMS Deserialization issue because of ActiveMQ client vulnerability

Severity: Moderate

Versions Affected:

• Apache NiFi 0.1.0 - 1.5.0

Description: Malicious JMS content could cause denial of service. See ActiveMQ CVE-2015-5254 announcement for more information.

Mitigation: The fix to upgrade the activemq-client library to 5.15.3 was applied on the Apache NiFi 1.6.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by 圆珠笔.

CVE Link: Mitre Database: CVE-2018-1310

Released: April 8, 2018

CVE-2017-8028: Apache NiFi LDAP TLS issue because of Spring Security LDAP vulnerability

Severity: Critical

Versions Affected:

• Apache NiFi 0.1.0 - 1.5.0

Description: Spring Security LDAP library was not enforcing credential authentication after TLS handshake negotiation. See NVD CVE-2017-8028 disclosure for more information.

Mitigation: The fix to upgrade the spring-ldap library to 2.3.2.RELEASE+ was applied on the Apache NiFi 1.6.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Matthew Elder.

CVE Link: Mitre Database: CVE-2017-8028

Released: April 8, 2018

CVE-2018-1324: Apache NiFi Denial of service issue because of commons-compress vulnerability – This issue was resolved in Apache NiFi 1.7.0

Severity: Low

Versions Affected:

• Apache NiFi 0.1.0 - 1.5.0

Description: A vulnerability in the commons-compress library could cause denial of service. See commons-compress CVE-2018-1324 announcement for more information.

Mitigation: The fix to upgrade the commons-compress library to 1.16.1 was applied on the Apache NiFi 1.6.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Joe Witt.

CVE Link: Mitre Database: CVE-2018-1324

Released: April 8, 2018

CVE-2017-12632: Apache NiFi host header poisoning issue

Severity: Moderate

Versions Affected:

• Apache NiFi 0.1.0 - 1.4.0

Description: A malicious host header in an incoming HTTP request could cause NiFi to load resources from an external server.

Mitigation: The fix to sanitize host headers and compare to a controlled whitelist was applied on the Apache NiFi 1.5.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Mike Cole.

CVE Link: Mitre Database: CVE-2017-12632

Released: January 12, 2018

CVE-2017-15697: Apache NiFi XSS issue in context path handling

Severity: Moderate

Versions Affected:

• Apache NiFi 1.0.0 - 1.4.0

Description: A malicious X-ProxyContextPath or X-Forwarded-Context header containing external resources or embedded code could cause remote code execution.

Mitigation: The fix to properly handle these headers was applied on the Apache NiFi 1.5.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Andy LoPresto.

CVE Link: Mitre Database: CVE-2017-15697

Released: January 12, 2018

CVE-2017-12623: Apache NiFi XXE issue in template XML upload

Severity: Moderate Important

Versions Affected:

• Apache NiFi 1.0.0 - 1.3.0

Description: An authorized user Any authenticated user (valid client certificate but without ACL permissions) could upload a template which contained malicious code and accessed sensitive files via an XML External Entity (XXE) attack.

Mitigation: The fix to properly handle XML External Entities was applied on the Apache NiFi 1.4.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Paweł Gocyla and further information was provided by Mike Cole.

CVE Link: Mitre Database: CVE-2017-12623

Released: October 2, 2017 (Updated January 23, 2018)

CVE-2017-15703: Apache NiFi Java deserialization issue in template XML upload

Severity: Moderate

Versions Affected:

• Apache NiFi 1.0.0 - 1.3.0

Description: Any authenticated user (valid client certificate but without ACL permissions) could upload a template which contained malicious code and caused a denial of service via Java deserialization attack.

Mitigation: The fix to properly handle Java deserialization was applied on the Apache NiFi 1.4.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Mike Cole.

CVE Link: Mitre Database: CVE-2017-15703

Released: October 2, 2017 (Updated January 25, 2018)

Fixed in Apache NiFi 0.7.4 and 1.3.0

CVE-2017-7665: Apache NiFi XSS issue on certain user input components

Severity: Important

Versions Affected:

• Apache NiFi 0.0.1 - 0.7.3
• Apache NiFi 1.0.0 - 1.2.0

Description: There are certain user input components in the Apache NiFi UI which had been guarding for some forms of XSS issues but were insufficient.

Mitigation: The fix for more complete user input sanitization will be applied on Apache NiFi 0.7.4 and Apache NiFi 1.3.0 releases. Users running a prior 0.x or 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Matt Gilman.

Released: May 8, 2017 (1.2.0); May 17, 2017 (0.7.3)

CVE-2017-7667: Apache NiFi XFS issue due to insufficient response headers

Severity: Important

Versions Affected:

• Apache NiFi 0.0.1 - 0.7.3
• Apache NiFi 1.0.0 - 1.2.0

Description: Apache NiFi needs to establish the response header telling browsers to only allow framing with the same origin.

Mitigation: The fix to set this response header will be applied on Apache NiFi 0.7.4 and Apache NiFi 1.3.0 releases. Users running a prior 0.x or 1.x release should upgrade to the appropriate release.

Credit: This issue was discovered by Matt Gilman.

Released: May 8, 2017 (1.2.0); May 17, 2017 (0.7.3)

Fixed in Apache NiFi 0.7.2 and 1.1.2

CVE-2017-5635: Apache NiFi Unauthorized Data Access In Cluster Environment

Severity: Important

Versions Affected:

• Apache NiFi 0.7.0
• Apache NiFi 0.7.1
• Apache NiFi 1.1.0
• Apache NiFi 1.1.1

Description: In a cluster environment, if an anonymous user request is replicated to another node, the originating node identity is used rather than the “anonymous” user.

Mitigation: A fix has been provided (removing the negative check for anonymous user before building the proxy chain and throwing an exception, and evaluating each user in the proxy chain iteration and comparing against a static constant anonymous user). This fix was applied in NIFI-3487 and released in Apache NiFi 0.7.2 and 1.1.2. 1.x users running a clustered environment should upgrade to 1.1.2. 0.x users running a clustered environment should upgrade to 0.7.2. Additional migration guidance can be found here.

Credit: This issue was discovered by Leonardo Dias in conjunction with Matt Gilman.

Released: February 20, 2017

CVE-2017-5636: Apache NiFi User Impersonation In Cluster Environment

Severity: Moderate

Versions Affected:

• Apache NiFi 0.7.0
• Apache NiFi 0.7.1
• Apache NiFi 1.1.0
• Apache NiFi 1.1.1

Description: In a cluster environment, the proxy chain serialization/deserialization is vulnerable to an injection attack where a carefully crafted username could impersonate another user and gain their permissions on a replicated request to another node.

Mitigation: A fix has been provided (modification of the tokenization code and sanitization of user-provided input). This fix was applied in NIFI-3487 and released in Apache NiFi 0.7.2 and 1.1.2. 1.x users running a clustered environment should upgrade to 1.1.2. 0.x users running a clustered environment should upgrade to 0.7.2. Additional migration guidance can be found here.

Credit: This issue was discovered by Andy LoPresto.

Released: February 20, 2017

Fixed in Apache NiFi 1.0.1 and 1.1.1

CVE-2016-8748: Apache NiFi XSS vulnerability in connection details dialogue

Severity: Moderate

Versions Affected:

• Apache NiFi 1.0.0
• Apache NiFi 1.1.0

Description: There is a cross-site scripting vulnerability in connection details dialog when accessed by an authorized user. The user supplied text was not being properly handled when added to the DOM.

Mitigation: 1.0.0 users should upgrade to 1.0.1 or 1.1.1. 1.1.0 users should upgrade to 1.1.1. Additional migration guidance can be found here.

Credit: This issue was discovered by Matt Gilman of the Apache NiFi PMC during a code review.

Released: December 19, 2016 (1.0.1); December 22, 2016 (1.1.1)

Severity Levels

The following lists the severity levels and criteria followed. It closely aligns to and borrows from Apache HTTP Server Project guidance.

Critical

A vulnerability rated with a critical impact is one which could be potentially exploited by a remote attacker to get NiFi to execute arbitrary code either as the user the server is running as or root. These are the sorts of vulnerabilities that could be exploited automatically by worms.

Important

A vulnerability rated as Important impact is one which could result in the compromise of data or availability of the server. For Apache NiFi this includes issues that allow an easy remote denial of service or access to files that should be otherwise prevented by limits or authentication.

Moderate

A vulnerability is likely to be rated as Moderate if there is significant mitigation to make the issue less of an impact. This might be done because the flaw does not affect likely configurations, or it is a configuration that isn’t widely used, or where a remote user must be authenticated in order to exploit the issue.

Low

All other security flaws are classed as a Low impact. This rating is used for issues that are believed to be extremely hard to exploit, or where an exploit gives minimal consequences.