Headline
CVE-2019-11718: Security vulnerabilities fixed in Firefox 68
Activity Stream can display content from sent from the Snippet Service website. This content is written to innerHTML on the Activity Stream page without sanitization, allowing for a potential access to other information available to the Activity Stream, such as browsing history, if the Snipper Service were compromised. This vulnerability affects Firefox < 68.
Mozilla Foundation Security Advisory 2019-21
Announced
July 9, 2019
Impact
critical
Products
Firefox
Fixed in
- Firefox 68
#CVE-2019-9811: Sandbox escape via installation of malicious language pack
Reporter
Niklas Baumstark
Impact
high
Description
As part of his winning Pwn2Own entry, Niklas Baumstark demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation.
References
- Bug 1538007
- Bug 1539598
- Bug 1539759
- Bug 1523741
- Bug 1563327
#CVE-2019-11711: Script injection within domain through inner window reuse
Reporter
Boris Zbarsky
Impact
high
Description
When an inner window is reused, it does not consider the use of document.domain for cross-origin protections. If pages on different subdomains ever cooperatively use document.domain, then either page can abuse this to inject script into arbitrary pages on the other subdomain, even those that did not use document.domain to relax their origin security.
References
- Bug 1552541
#CVE-2019-11712: Cross-origin POST requests can be made with NPAPI plugins by following 308 redirects
Reporter
Gregory Smiley of Security Compass
Impact
high
Description
POST requests made by NPAPI plugins, such as Flash, that receive a status 308 redirect response can bypass CORS requirements. This can allow an attacker to perform Cross-Site Request Forgery (CSRF) attacks.
References
- Bug 1543804
#CVE-2019-11713: Use-after-free with HTTP/2 cached stream
Reporter
Hanno Böck
Impact
high
Description
A use-after-free vulnerability can occur in HTTP/2 when a cached HTTP/2 stream is closed while still in use, resulting in a potentially exploitable crash.
References
- Bug 1528481
#CVE-2019-11714: NeckoChild can trigger crash when accessed off of main thread
Reporter
Hanno Böck
Impact
moderate
Description
Necko can access a child on the wrong thread during UDP connections, resulting in a potentially exploitable crash in some instances.
References
- Bug 1542593
#CVE-2019-11729: Empty or malformed p256-ECDH public keys may trigger a segmentation fault
Reporter
Jonas Allmann
Impact
moderate
Description
Empty or malformed p256-ECDH public keys may trigger a segmentation fault due values being improperly sanitized before being copied into memory and used.
References
- Bug 1515342
#CVE-2019-11715: HTML parsing error can contribute to content XSS
Reporter
Linus Särud
Impact
moderate
Description
Due to an error while parsing page content, it is possible for properly sanitized user input to be misinterpreted and lead to XSS hazards on web sites in certain circumstances.
References
- Bug 1555523
#CVE-2019-11716: globalThis not enumerable until accessed
Reporter
Chris Hacking
Impact
moderate
Description
Until explicitly accessed by script, window.globalThis is not enumerable and, as a result, is not visible to code such as Object.getOwnPropertyNames(window). Sites that deploy a sandboxing that depends on enumerating and freezing access to the window object may miss this, allowing their sandboxes to be bypassed.
References
- Bug 1552632
#CVE-2019-11717: Caret character improperly escaped in origins
Reporter
Tyson Smith
Impact
moderate
Description
A vulnerability exists where the caret (“^”) character is improperly escaped constructing some URIs due to it being used as a separator, allowing for possible spoofing of origin attributes.
References
- Bug 1548306
#CVE-2019-11718: Activity Stream writes unsanitized content to innerHTML
Reporter
Mark Banner
Impact
moderate
Description
Activity Stream can display content from sent from the Snippet Service website. This content is written to innerHTML on the Activity Stream page without sanitization, allowing for a potential access to other information available to the Activity Stream, such as browsing history, if the Snipper Service were compromised.
References
- Bug 1408349
#CVE-2019-11719: Out-of-bounds read when importing curve25519 private key
Reporter
Henry Corrigan-Gibbs
Impact
moderate
Description
When importing a curve25519 private key in PKCS#8format with leading 0x00 bytes, it is possible to trigger an out-of-bounds read in the Network Security Services (NSS) library. This could lead to information disclosure.
References
- Bug 1540541
#CVE-2019-11720: Character encoding XSS vulnerability
Reporter
Rakesh Mane
Impact
moderate
Description
Some unicode characters are incorrectly treated as whitespace during the parsing of web content instead of triggering parsing errors. This allows malicious code to then be processed, evading cross-site scripting (XSS) filtering.
References
- Bug 1556230
#CVE-2019-11721: Domain spoofing through unicode latin ‘kra’ character
Reporter
Anonymous
Impact
moderate
Description
The unicode latin ‘kra’ character can be used to spoof a standard ‘k’ character in the addressbar. This allows for domain spoofing attacks as do not display as punycode text, allowing for user confusion.
References
- Bug 1256009
#CVE-2019-11730: Same-origin policy treats all files in a directory as having the same-origin
Reporter
Luigi Gubello
Impact
moderate
Description
A vulnerability exists where if a user opens a locally saved HTML file, this file can use file: URIs to access other files in the same directory or sub-directories if the names are known or guessed. The Fetch API can then be used to read the contents of any files stored in these directories and they may uploaded to a server. Luigi Gubello demonstrated that in combination with a popular Android messaging app, if a malicious HTML attachment is sent to a user and they opened that attachment in Firefox, due to that app’s predictable pattern for locally-saved file names, it is possible to read attachments the victim received from other correspondents.
References
- Bug 1558299
#CVE-2019-11723: Cookie leakage during add-on fetching across private browsing boundaries
Reporter
Andreas Wagner
Impact
low
Description
A vulnerability exists during the installation of add-ons where the initial fetch ignored the origin attributes of the browsing context. This could leak cookies in private browsing mode or across different “containers” for people who use the Firefox Multi-Account Containers Web Extension.
References
- Bug 1528335
#CVE-2019-11724: Retired site input.mozilla.org has remote troubleshooting permissions
Reporter
Frederik Braun
Impact
low
Description
Application permissions give additional remote troubleshooting permission to the site input.mozilla.org, which has been retired and now redirects to another site. This additional permission is unnecessary and is a potential vector for malicious attacks.
References
- Bug 1512511
#CVE-2019-11725: Websocket resources bypass safebrowsing protections
Reporter
Andrey
Impact
low
Description
When a user navigates to site marked as unsafe by the Safebrowsing API, warning messages are displayed and navigation is interrupted but resources from the same site loaded through websockets are not blocked, leading to the loading of unsafe resources and bypassing safebrowsing protections.
References
- Bug 1483510
#CVE-2019-11727: PKCS#1 v1.5 signatures can be used for TLS 1.3
Reporter
Hubert Kario
Impact
low
Description
A vulnerability exists where it possible to force Network Security Services (NSS) to sign CertificateVerify with PKCS#1 v1.5 signatures when those are the only ones advertised by server in CertificateRequest in TLS 1.3. PKCS#1 v1.5 signatures should not be used for TLS 1.3 messages.
References
- Bug 1552208
#CVE-2019-11728: Port scanning through Alt-Svc header
Reporter
Trishita Tiwari, Ari Trachtenberg
Impact
low
Description
The HTTP Alternative Services header, Alt-Svc, can be used by a malicious site to scan all TCP ports of any host that the accessible to a user when web content is loaded.
References
- Bug 1552993
#CVE-2019-11710: Memory safety bugs fixed in Firefox 68
Reporter
Mozilla developers and community
Impact
critical
Description
Mozilla developers and community members André Bargull, Christian Holler, Natalia Csoregi, Raul Gurzau, Daniel Varga, Jon Coppeard, Marcia Knous, Gary Kwong, Randell Jesup, David Bolter, Jeff Gilbert, and Deian Stefan reported memory safety bugs present in Firefox 67. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code.
References
- Memory safety bugs fixed in Firefox 68
#CVE-2019-11709: Memory safety bugs fixed in Firefox 68 and Firefox ESR 60.8
Reporter
Mozilla developers and community
Impact
critical
Description
Mozilla developers and community members Andreea Pavel, Christian Holler, Honza Bambas, Jason Kratzer, and Jeff Gilbert reported memory safety bugs present in Firefox 67 and Firefox ESR 60.7. Some of these bugs showed evidence of memory corruption and we presume that with enough effort that some of these could be exploited to run arbitrary code.
References
- Memory safety bugs fixed in Firefox 68 and Firefox ESR 60.8
Related news
"IBM Security Guardium 10.5, 10.6, 11.0, 11.1, 11.2, 11.3, and 11.4 stores user credentials in plain clear text which can be read by a local privileged user. IBM X-Force ID: 215587."
As part of a winning Pwn2Own entry, a researcher demonstrated a sandbox escape by installing a malicious language pack and then opening a browser feature that used the compromised translation. This vulnerability affects Firefox ESR < 60.8, Firefox < 68, and Thunderbird < 60.8.