This update for MozillaFirefox fixes the following issues :

Firefox Extended Support Release 78.7.0 ESR (MFSA 2021-04, bsc#1181414)

  - CVE-2021-23953: Fixed a Cross-origin information leakage     via redirected PDF requests

  - CVE-2021-23954: Fixed a type confusion when using     logical assignment operators in JavaScript switch     statements

  - CVE-2020-26976: Fixed an issue where HTTPS pages could     have been intercepted by a registered service worker     when they should not have been

  - CVE-2021-23960: Fixed a use-after-poison for incorrectly     redeclared JavaScript variables during GC

  - CVE-2021-23964: Fixed Memory safety bugs

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has thunderbird packages installed that are affected by multiple vulnerabilities:

  - Use after free in WebRTC in Google Chrome prior to 88.0.4324.96 allowed a remote attacker to potentially     exploit heap corruption via a crafted SCTP packet. (CVE-2020-16044)

  - When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former,     the service worker could have intercepted the request for the secure page despite the iframe not being a     secure context due to the (insecure) framing. This vulnerability affects Firefox < 84. (CVE-2020-26976)

  - If a user clicked into a specifically crafted PDF, the PDF reader could be confused into leaking cross-     origin information, when said information is served as chunked data. This vulnerability affects Firefox <     85, Thunderbird < 78.7, and Firefox ESR < 78.7. (CVE-2021-23953)

  - Using the new logical assignment operators in a JavaScript switch statement could have caused a type     confusion, leading to a memory corruption and a potentially exploitable crash. This vulnerability affects     Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7. (CVE-2021-23954)

  - Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a     potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox     ESR < 78.7. (CVE-2021-23960)

  - Mozilla developers reported memory safety bugs present in Firefox 84 and Firefox ESR 78.6. Some of these     bugs showed evidence of memory corruption and we presume that with enough effort some of these could have     been exploited to run arbitrary code. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and     Firefox ESR < 78.7. (CVE-2021-23964)

  - If Content Security Policy blocked frame navigation, the full destination of a redirect served in the     frame was reported in the violation report; as opposed to the original frame URI. This could be used to     leak sensitive information contained in such URIs. This vulnerability affects Firefox < 86, Thunderbird <     78.8, and Firefox ESR < 78.8. (CVE-2021-23968)

  - As specified in the W3C Content Security Policy draft, when creating a violation report, User agents need     to ensure that the source file is the URL requested by the page, pre-redirects. If that's not possible,     user agents need to strip the URL down to an origin to avoid unintentional leakage. Under certain types     of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was     fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird <     78.8, and Firefox ESR < 78.8. (CVE-2021-23969)

  - When trying to load a cross-origin resource in an audio/video context a decoding error may have resulted,     and the content of that error may have revealed information about the resource. This vulnerability affects     Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8. (CVE-2021-23973)

  - Mozilla developers reported memory safety bugs present in Firefox 85 and Firefox ESR 78.7. Some of these     bugs showed evidence of memory corruption and we presume that with enough effort some of these could have     been exploited to run arbitrary code. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and     Firefox ESR < 78.8. (CVE-2021-23978)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
145739	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:0241-1)	Nessus	SuSE Local Security Checks	2/1/2021	3/8/2021	high
145765	SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:0246-1)	Nessus	SuSE Local Security Checks	2/1/2021	3/8/2021	high
154471	NewStart CGSL CORE 5.05 / MAIN 5.05 : thunderbird Multiple Vulnerabilities (NS-SA-2021-0177)	Nessus	NewStart CGSL Local Security Checks	10/27/2021	11/27/2023	high

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