The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 91.4.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2021-53 advisory.

  - Mozilla developers and community members Julian Hector, Randell Jesup, Gabriele Svelto, Tyson Smith,     Christian Holler, and Masayuki Nakano reported memory safety bugs present in Firefox 94 and Firefox ESR     91.3. 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-2021-4129)

  - Failure to correctly record the location of live pointers across wasm instance calls resulted in a GC     occurring within the call not tracing those live pointers. This could have led to a use-after-free causing     a potentially exploitable crash. (CVE-2021-43539)

  - Under certain circumstances, asynchronous functions could have caused a navigation to fail but expose the     target URL. (CVE-2021-43536)

  - An incorrect type conversion of sizes from 64bit to 32bit integers allowed an attacker to corrupt memory     leading to a potentially exploitable crash. (CVE-2021-43537)

  - By misusing a race in our notification code, an attacker could have forcefully hidden the notification for     pages that had received full screen and pointer lock access, which could have been used for spoofing     attacks. (CVE-2021-43538)

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

The remote Redhat Enterprise Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:5014 advisory.

    Mozilla Firefox is an open-source web browser, designed for standards compliance, performance, and     portability.

    This update upgrades Firefox to version 91.4.0 ESR.

    Security Fix(es):

    * Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4

    * Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

    * Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

    * Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

    * Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

    * Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

    * Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler     (CVE-2021-43542)

    * Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

    * Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

    * Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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 Redhat Enterprise Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:5048 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    This update upgrades Thunderbird to version 91.4.0.

    Security Fix(es):

    * Mozilla: Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4 (BZ#2030116)

    * Mozilla: URL leakage when navigating while executing asynchronous function (CVE-2021-43536)

    * Mozilla: Heap buffer overflow when using structured clone (CVE-2021-43537)

    * Mozilla: Missing fullscreen and pointer lock notification when requesting both (CVE-2021-43538)

    * Mozilla: GC rooting failure when calling wasm instance methods (CVE-2021-43539)

    * Mozilla: External protocol handler parameters were unescaped (CVE-2021-43541)

    * Mozilla: XMLHttpRequest error codes could have leaked the existence of an external protocol handler     (CVE-2021-43542)

    * Mozilla: Bypass of CSP sandbox directive when embedding (CVE-2021-43543)

    * Mozilla: JavaScript unexpectedly enabled for the composition area (CVE-2021-43528)

    * Mozilla: Denial of Service when using the Location API in a loop (CVE-2021-43545)

    * Mozilla: Cursor spoofing could overlay user interface when native cursor is zoomed (CVE-2021-43546)

    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.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux 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
155916	Mozilla Firefox ESR < 91.4.0	Nessus	MacOS X Local Security Checks	12/8/2021	11/18/2025	critical
155954	RHEL 7 : firefox (RHSA-2021:5014)	Nessus	Red Hat Local Security Checks	12/8/2021	11/7/2024	critical
155976	RHEL 8 : thunderbird (RHSA-2021:5048)	Nessus	Red Hat Local Security Checks	12/10/2021	11/7/2024	critical

Detections

Analytics

Plugins Search

critical

critical

critical