The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:14826-1 advisory.

    MozillaFirefox was updated to 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
      * 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)

    Firefox Extended Support 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

    Firefox 91.0.1esr ESR

      * Fixed: Fixed an issue causing buttons on the tab bar to be         resized when loading certain websites (bug 1704404)         (bmo#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)         (bmo#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

    rust-cbindgen was updated to 0.19.0.

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.

Detections

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SUSE SLES11: MozillaFirefox / MozillaFirefox-branding-SLED / etc (SUSE-SU-2021:14826-1)

critical Nessus Plugin ID 154212

Version 1.12

Version 1.11

Version 1.10

Version 1.9

Version 1.12 Jun 25, 2026, 9:50 PM Plugin metadata Plugin Feed: 202606252150
Version 1.11 Mar 6, 2025, 5:02 PM IAVM reference Plugin Feed: 202503061702
Version 1.10 Jul 14, 2023, 5:13 AM CVSS temporal metrics ("CVSSv2 temporal vector" set to "CVSS2#E:POC/RL:OF/RC:C". "CVSSv3 temporal vector" set to "CVSS:3.0/E:P/RL:O/RC:C") Plugin metadata Plugin Feed: 202307140513
Version 1.9 Jul 12, 2023, 5:37 PM Detection Plugin Feed: 202307121737