The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3331-1 advisory.

    This update contains the Firefox Extended Support Release 91.2.0 ESR.

    Firefox Extended Support Release 91.2.0 ESR

    * Fixed: Various stability, functionality, and security fixes      MFSA 2021-45 (bsc#1191332)
    * CVE-2021-38496: Use-after-free in MessageTask
    * CVE-2021-38497: Validation message could have been overlaid on another origin
    * CVE-2021-38498: Use-after-free of nsLanguageAtomService object
    * CVE-2021-32810: Data race in crossbeam-deque

      https://github.com/crossbeam-rs/crossbeam/security/advisories/GHSA-pqqp-xmhj-wgcw)

    * CVE-2021-38500 (bmo#1725854, bmo#1728321)       Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15,       and Firefox ESR 91.2
    * CVE-2021-38501 (bmo#1685354, bmo#1715755, bmo#1723176)       Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2

    - Fixed crash in FIPS mode (bsc#1190710)

    * Fixed: Various stability, functionality, and security fixes

    MFSA 2021-40 (bsc#1190269, bsc#1190274):

    * CVE-2021-38492: Navigating to `mk:` URL scheme could load Internet Explorer
    * CVE-2021-38495: Memory safety bugs fixed in Firefox 92 and Firefox ESR 91.1

    Firefox Extended Support Release 91.0.1 ESR

    * Fixed: Fixed an issue causing buttons on the tab bar to be       resized when loading certain websites (bug 1704404)
    * Fixed: Fixed an issue which caused tabs from private windows       to be visible in non-private windows when viewing switch-to-       tab results in the address bar panel (bug 1720369)
    * Fixed: Various stability fixes
    * Fixed: Security fix MFSA 2021-37 (bsc#1189547)
    * CVE-2021-29991 (bmo#1724896)       Header Splitting possible with HTTP/3 Responses

    Firefox Extended Support Release 91.0 ESR

    * New: Some of the highlights of the new Extended Support Release are:

      - A number of user interface changes. For more information,         see the Firefox 89 release notes.
      - Firefox now supports logging into Microsoft, work, and         school accounts using Windows single sign-on. Learn more
      - On Windows, updates can now be applied in the background         while Firefox is not running.
      - Firefox for Windows now offers a new page about:third-party         to help identify compatibility issues caused by third-party         applications
      - Version 2 of Firefox's SmartBlock feature further improves         private browsing. Third party Facebook scripts are blocked to         prevent you from being tracked, but are now automatically         loaded 'just in time' if you decide to 'Log in with Facebook'         on any website.
      - Enhanced the privacy of the Firefox Browser's Private         Browsing mode with Total Cookie Protection, which confines         cookies to the site where they were created, preventing         companis from using cookies to track your browsing across         sites. This feature was originally launched in Firefox's ETP         Strict mode.
      - PDF forms now support JavaScript embedded in PDF files.
        Some PDF forms use JavaScript for validation and other         interactive features.
      - You'll encounter less website breakage in Private Browsing         and Strict Enhanced Tracking Protection with SmartBlock,         which provides stand-in scripts so that websites load         properly.
      - Improved Print functionality with a cleaner design and         better integration with your computer's printer settings.
      - Firefox now protects you from supercookies, a type of         tracker that can stay hidden in your browser and track you         online, even after you clear cookies. By isolating         supercookies, Firefox prevents them from tracking your web         browsing from one site to the next.
      - Firefox now remembers your preferred location for saved         bookmarks, displays the bookmarks toolbar by default on new         tabs, and gives you easy access to all of your bookmarks via         a toolbar folder.
      - Native support for macOS devices built with Apple Silicon         CPUs brings dramatic performance improvements over the non-         native build that was shipped in Firefox 83: Firefox launches         over 2.5 times faster and web apps are now twice as         responsive (per the SpeedoMeter 2.0 test). If you are on a         new Apple device, follow these steps to upgrade to the latest         Firefox.
      - Pinch zooming will now be supported for our users with         Windows touchscreen devices and touchpads on Mac devices.
        Firefox users may now use pinch to zoom on touch-capable         devices to zoom in and out of webpages.
      - Weve improved functionality and design for a number of         Firefox search features:
        * Selecting a search engine at the bottom of the search           panel now enters search mode for that engine, allowing you to           see suggestions (if available) for your search terms. The old           behavior (immediately performing a search) is available with           a shift-click.
        * When Firefox autocompletes the URL of one of your search           engines, you can now search with that engine directly in the           address bar by selecting the shortcut in the address bar           results.
        * Weve added buttons at the bottom of the search panel to           allow you to search your bookmarks, open tabs, and history.
      - Firefox supports AcroForm, which will allow you to fill in,         print, and save supported PDF forms and the PDF viewer also         has a new fresh look.
      - For our users in the US and Canada, Firefox can now save,         manage, and auto-fill credit card information for you, making         shopping on Firefox ever more convenient.
      - In addition to our default, dark and light themes, with         this release, Firefox introduces the Alpenglow theme: a         colorful appearance for buttons, menus, and windows. You can         update your Firefox themes under settings or preferences.
    * Changed: Firefox no longer supports Adobe Flash. There is no       setting available to re-enable Flash support.
    * Enterprise: Various bug fixes and new policies have been       implemented in the latest version of Firefox. See more       details in the Firefox for Enterprise 91 Release Notes.

      MFSA 2021-33 (bsc#1188891):

    * CVE-2021-29986: Race condition when resolving DNS names could have led to       memory corruption
    * CVE-2021-29981: Live range splitting could have led to conflicting       assignments in the JIT
    * CVE-2021-29988: Memory corruption as a result of incorrect style treatment
    * CVE-2021-29983: Firefox for Android could get stuck in fullscreen mode
    * CVE-2021-29984: Incorrect instruction reordering during JIT optimization
    * CVE-2021-29980: Uninitialized memory in a canvas object could have led to       memory corruption
    * CVE-2021-29987: Users could have been tricked into accepting unwanted       permissions on Linux
    * CVE-2021-29985: Use-after-free media channels
    * CVE-2021-29982: Single bit data leak due to incorrect JIT optimization and       type confusion
    * CVE-2021-29989: Memory safety bugs fixed in Firefox 91 and Firefox ESR 78.13
    * CVE-2021-29990: Memory safety bugs fixed in Firefox 91

Tenable has extracted the preceding description block directly from the SUSE security advisory.

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

The remote SUSE Linux SUSE15 host has a package installed that is affected by multiple vulnerabilities as referenced in the openSUSE-SU-2021:3331-1 advisory.

  - Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption     and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91,     Firefox ESR < 78.13, and Firefox < 91. (CVE-2021-29980)

  - An issue present in lowering/register allocation could have led to obscure but deterministic register     confusion failures in JITted code that would lead to a potentially exploitable crash. This vulnerability     affects Firefox < 91 and Thunderbird < 91. (CVE-2021-29981)

  - Due to incorrect JIT optimization, we incorrectly interpreted data from the wrong type of object,     resulting in the potential leak of a single bit of memory. This vulnerability affects Firefox < 91 and     Thunderbird < 91. (CVE-2021-29982)

  - Firefox for Android could get stuck in fullscreen mode and not exit it even after normal interactions that     should cause it to exit. *Note: This issue only affected Firefox for Android. Other operating systems are     unaffected.*. This vulnerability affects Firefox < 91. (CVE-2021-29983)

  - Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly     considered during garbage collection. This led to memory corruption and a potentially exploitable crash.
    This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
    (CVE-2021-29984)

  - A use-after-free vulnerability in media channels could have led to memory corruption and a potentially     exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13,     and Firefox < 91. (CVE-2021-29985)

  - A suspected race condition when calling getaddrinfo led to memory corruption and a potentially exploitable     crash. *Note: This issue only affected Linux operating systems. Other operating systems are unaffected.*     This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
    (CVE-2021-29986)

  - After requesting multiple permissions, and closing the first permission panel, subsequent permission     panels will be displayed in a different position but still record a click in the default location, making     it possible to trick a user into accepting a permission they did not want to. *This bug only affects     Firefox on Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox < 91 and     Thunderbird < 91. (CVE-2021-29987)

  - Firefox incorrectly treated an inline list-item element as a block element, resulting in an out of bounds     read or memory corruption, and a potentially exploitable crash. This vulnerability affects Thunderbird <     78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91. (CVE-2021-29988)

  - Mozilla developers reported memory safety bugs present in Firefox 90 and Firefox ESR 78.12. 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 Thunderbird < 78.13, Firefox ESR < 78.13,     and Firefox < 91. (CVE-2021-29989)

  - Mozilla developers and community members reported memory safety bugs present in Firefox 90. 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 < 91. (CVE-2021-29990)

  - Firefox incorrectly accepted a newline in a HTTP/3 header, interpretting it as two separate headers. This     allowed for a header splitting attack against servers using HTTP/3.  (CVE-2021-29991)

  - crossbeam-deque is a package of work-stealing deques for building task schedulers when programming in     Rust. In versions prior to 0.7.4 and 0.8.0, the result of the race condition is that one or more tasks in     the worker queue can be popped twice instead of other tasks that are forgotten and never popped. If tasks     are allocated on the heap, this can cause double free and a memory leak. If not, this still can cause a     logical bug. Crates using `Stealer::steal`, `Stealer::steal_batch`, or `Stealer::steal_batch_and_pop` are     affected by this issue. This has been fixed in crossbeam-deque 0.8.1 and 0.7.4. (CVE-2021-32810)

  - When delegating navigations to the operating system, Firefox would accept the `mk` scheme which might     allow attackers to launch pages and execute scripts in Internet Explorer in unprivileged mode. This     bug only affects Firefox for Windows. Other operating systems are unaffected.  (CVE-2021-38492)

  - Mozilla developers Tyson Smith, Christian Holler, and Gabriele Svelto reported memory safety bugs present     in Thunderbird 78.13.0. 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.  (CVE-2021-38495)

  - During operations on MessageTasks, a task may have been removed while it was still scheduled, resulting in     memory corruption and a potentially exploitable crash.  (CVE-2021-38496)

  - Through use of reportValidity() and window.open(), a plain-text validation     message could have been overlaid on another origin, leading to possible user confusion and spoofing     attacks.  (CVE-2021-38497)

  - During process shutdown, a document could have caused a use-after-free of a languages service object,     leading to memory corruption and a potentially exploitable crash.  (CVE-2021-38498)

  - Mozilla developers and community members Andreas Pehrson and Christian Holler reported memory safety bugs     present in Firefox 92 and Firefox ESR 91.1. 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.
    (CVE-2021-38500)

  - Mozilla developers and community members Kevin Brosnan, Mihai Alexandru Michis, and Christian Holler     reported memory safety bugs present in Firefox 92 and Firefox ESR 91.1. 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.  (CVE-2021-38501)

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

The remote SUSE Linux SLED15 / SLES15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:3451-1 advisory.

    This update contains the Firefox Extended Support Release 91.2.0 ESR.

    Release 91.2.0 ESR:

    * Fixed: Various stability, functionality, and security fixes

    MFSA 2021-45 (bsc#1191332):

    * CVE-2021-38496: Use-after-free in MessageTask
    * CVE-2021-38497: Validation message could have been overlaid on another origin
    * CVE-2021-38498: Use-after-free of nsLanguageAtomService object
    * CVE-2021-32810: Fixed Data race in crossbeam-deque
    * CVE-2021-38500: Memory safety bugs fixed in Firefox 93, Firefox ESR 78.15, and Firefox ESR 91.2
    * CVE-2021-38501: Memory safety bugs fixed in Firefox 93 and Firefox ESR 91.2

    - Fixed crash in FIPS mode (bsc#1190710)

    Release 91.1.0 ESR:

    * Fixed: Various stability, functionality, and security fixes

    MFSA 2021-40 (bsc#1190269, bsc#1190274):

    * CVE-2021-38492: Navigating to `mk:` URL scheme could load Internet Explorer
    * CVE-2021-38495: Memory safety bugs fixed in Firefox 92 and Firefox ESR 91.1

    Release 91.0.1esr ESR:

    * Fixed: Fixed an issue causing buttons on the tab bar to be       resized when loading certain websites (bug 1704404)
    * Fixed: Fixed an issue which caused tabs from private windows       to be visible in non-private windows when viewing switch-to-       tab results in the address bar panel (bug 1720369)
    * Fixed: Various stability fixes
    * Fixed: Security fix MFSA 2021-37 (bsc#1189547)
    * CVE-2021-29991 (bmo#1724896)       Header Splitting possible with HTTP/3 Responses

    Firefox Extended Support Release 91.0 ESR

    * New: Some of the highlights of the new Extended Support Release are:

      - A number of user interface changes. For more information,         see the Firefox 89 release notes.
      - Firefox now supports logging into Microsoft, work, and         school accounts using Windows single sign-on. Learn more
      - On Windows, updates can now be applied in the background         while Firefox is not running.
      - Firefox for Windows now offers a new page about:third-party         to help identify compatibility issues caused by third-party         applications
      - Version 2 of Firefox's SmartBlock feature further improves         private browsing. Third party Facebook scripts are blocked to         prevent you from being tracked, but are now automatically         loaded 'just in time' if you decide to 'Log in with Facebook'         on any website.
      - Enhanced the privacy of the Firefox Browser's Private         Browsing mode with Total Cookie Protection, which confines         cookies to the site where they were created, preventing         companis from using cookies to track your browsing across         sites. This feature was originally launched in Firefox's ETP         Strict mode.
      - PDF forms now support JavaScript embedded in PDF files.
        Some PDF forms use JavaScript for validation and other         interactive features.
      - You'll encounter less website breakage in Private Browsing         and Strict Enhanced Tracking Protection with SmartBlock,         which provides stand-in scripts so that websites load         properly.
      - Improved Print functionality with a cleaner design and         better integration with your computer's printer settings.
      - Firefox now protects you from supercookies, a type of         tracker that can stay hidden in your browser and track you         online, even after you clear cookies. By isolating         supercookies, Firefox prevents them from tracking your web         browsing from one site to the next.
      - Firefox now remembers your preferred location for saved         bookmarks, displays the bookmarks toolbar by default on new         tabs, and gives you easy access to all of your bookmarks via         a toolbar folder.
      - Native support for macOS devices built with Apple Silicon         CPUs brings dramatic performance improvements over the non-         native build that was shipped in Firefox 83: Firefox launches         over 2.5 times faster and web apps are now twice as         responsive (per the SpeedoMeter 2.0 test). If you are on a         new Apple device, follow these steps to upgrade to the latest         Firefox.
      - Pinch zooming will now be supported for our users with         Windows touchscreen devices and touchpads on Mac devices.
        Firefox users may now use pinch to zoom on touch-capable         devices to zoom in and out of webpages.
      - Weve improved functionality and design for a number of         Firefox search features:
        * Selecting a search engine at the bottom of the search           panel now enters search mode for that engine, allowing you to           see suggestions (if available) for your search terms. The old           behavior (immediately performing a search) is available with           a shift-click.
        * When Firefox autocompletes the URL of one of your search           engines, you can now search with that engine directly in the           address bar by selecting the shortcut in the address bar           results.
        * Weve added buttons at the bottom of the search panel to           allow you to search your bookmarks, open tabs, and history.
      - Firefox supports AcroForm, which will allow you to fill in,         print, and save supported PDF forms and the PDF viewer also         has a new fresh look.
      - For our users in the US and Canada, Firefox can now save,         manage, and auto-fill credit card information for you, making         shopping on Firefox ever more convenient.
      - In addition to our default, dark and light themes, with         this release, Firefox introduces the Alpenglow theme: a         colorful appearance for buttons, menus, and windows. You can         update your Firefox themes under settings or preferences.
    * Changed: Firefox no longer supports Adobe Flash. There is no       setting available to re-enable Flash support.
    * Enterprise: Various bug fixes and new policies have been       implemented in the latest version of Firefox. See more       details in the Firefox for Enterprise 91 Release Notes.

      MFSA 2021-33 (bsc#1188891):

    * CVE-2021-29986: Race condition when resolving DNS names could have led to       memory corruption
    * CVE-2021-29981: Live range splitting could have led to conflicting       assignments in the JIT
    * CVE-2021-29988: Memory corruption as a result of incorrect style treatment
    * CVE-2021-29983: Firefox for Android could get stuck in fullscreen mode
    * CVE-2021-29984: Incorrect instruction reordering during JIT optimization
    * CVE-2021-29980: Uninitialized memory in a canvas object could have led to       memory corruption
    * CVE-2021-29987: Users could have been tricked into accepting unwanted       permissions on Linux
    * CVE-2021-29985: Use-after-free media channels
    * CVE-2021-29982: Single bit data leak due to incorrect JIT optimization and       type confusion
    * CVE-2021-29989: Memory safety bugs fixed in Firefox 91 and Firefox ESR 78.13
    * CVE-2021-29990: Memory safety bugs fixed in Firefox 91

Tenable has extracted the preceding description block directly from the SUSE security advisory.

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

ID	Name	Product	Family	Published	Updated	Severity
154003	SUSE SLES15: MozillaFirefox / MozillaFirefox-branding-SLE / MozillaFirefox-devel / etc (SUSE-SU-2021:3331-1)	Nessus	SuSE Local Security Checks	10/12/2021	6/25/2026	critical
154011	openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3331-1)	Nessus	SuSE Local Security Checks	10/12/2021	3/6/2025	critical
154182	SUSE SLED15: MozillaFirefox / MozillaFirefox-branding-SLE / MozillaFirefox-devel / etc (SUSE-SU-2021:3451-1)	Nessus	SuSE Local Security Checks	10/17/2021	6/25/2026	critical

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