The version of Firefox installed on the remote macOS or Mac OS X host is prior to 74.0.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-11 advisory.

  - Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We     are aware of targeted attacks in the wild abusing this flaw. (CVE-2020-6820)

  - Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-     free. We are aware of targeted attacks in the wild abusing this flaw. (CVE-2020-6819)

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

The version of Firefox ESR installed on the remote Windows host is prior to 68.6.1. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2020-11 advisory.

  - Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We     are aware of targeted attacks in the wild abusing this flaw. (CVE-2020-6820)

  - Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-     free. We are aware of targeted attacks in the wild abusing this flaw. (CVE-2020-6819)

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 6 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:1339 advisory.

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

    This update upgrades Firefox to version 68.6.1 ESR.

    Security Fix(es):

    * Mozilla: Use-after-free while running the nsDocShell destructor (CVE-2020-6819)

    * Mozilla: Use-after-free when handling a ReadableStream (CVE-2020-6820)

    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 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2020:1338 advisory.

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

    This update upgrades Firefox to version 68.6.1 ESR.

    Security Fix(es):

    * Mozilla: Use-after-free while running the nsDocShell destructor (CVE-2020-6819)

    * Mozilla: Use-after-free when handling a ReadableStream (CVE-2020-6820)

    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.

Mozilla Firefox was updated to 68.6.1esr to fix critical security issues :

MFSA 2020-11 (boo#1168630)

  - CVE-2020-6819: Use-after-free while running the     nsDocShell destructor

  - CVE-2020-6820: Use-after-free when handling a     ReadableStream

This update for MozillaFirefox fixes the following issues :

Mozilla Firefox 68.6.1esr MFSA 2020-11 (bsc#1168630)

  - CVE-2020-6819 (bmo#1620818) Use-after-free while running     the nsDocShell destructor

  - CVE-2020-6820 (bmo#1626728) Use-after-free when handling     a ReadableStream

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 Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2020-1341 advisory.

    [68.6.1-1.0.1.el8_1]
    - Rebuild to pickup Oracle default bookmarks [Orabug: 30069264]
    - Add firefox-oracle-default-prefs.js and remove the corresponding Red Hat file
    - Remove upstream references [Orabug: 30530527]

    [68.6.1-1]
    - Update to 68.6.1 ESR

Tenable has extracted the preceding description block directly from the Oracle 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 Oracle Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2020-1338 advisory.

    [68.6.1-1.0.1]
    - Remove upstream references [Orabug: 30143292]
    - Update distribution for Oracle Linux [Orabug: 30143292]
    - Add firefox-oracle-default-prefs.js and remove the corresponding Red Hat file

    [68.6.1-1]
    - Update to 68.6.1 ESR

Tenable has extracted the preceding description block directly from the Oracle 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.

Security Fix(es) :

  - Mozilla: Use-after-free while running the nsDocShell     destructor (CVE-2020-6819)

  - Mozilla: Use-after-free when handling a ReadableStream     (CVE-2020-6820)

  - Mozilla: Uninitialized memory could be read when using     the WebGL copyTexSubImage method (CVE-2020-6821)

  - Mozilla: Memory safety bugs fixed in Firefox 75 and     Firefox ESR 68.7 (CVE-2020-6825)

  - Mozilla: Out of bounds write in GMPDecodeData when     processing large images (CVE-2020-6822)

The remote SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2020:14337-1 advisory.

  - Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-     free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects     Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1. (CVE-2020-6819)

  - Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We     are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird <     68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1. (CVE-2020-6820)

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
135200	Mozilla Firefox < 74.0.1	Nessus	MacOS X Local Security Checks	4/6/2020	11/18/2025	high
135201	Mozilla Firefox ESR < 68.6.1	Nessus	Windows	4/6/2020	11/18/2025	high
135240	RHEL 6 : firefox (RHSA-2020:1339)	Nessus	Red Hat Local Security Checks	4/7/2020	11/7/2024	high
135242	RHEL 7 : firefox (RHSA-2020:1338)	Nessus	Red Hat Local Security Checks	4/7/2020	11/7/2024	high
135263	openSUSE Security Update : MozillaFirefox (openSUSE-2020-461)	Nessus	SuSE Local Security Checks	4/7/2020	12/5/2022	high
135266	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2020:0928-1)	Nessus	SuSE Local Security Checks	4/7/2020	4/25/2023	high
135377	Oracle Linux 8 : firefox (ELSA-2020-1341)	Nessus	Oracle Linux Local Security Checks	4/10/2020	10/23/2024	high
135430	Oracle Linux 7 : firefox (ELSA-2020-1338)	Nessus	Oracle Linux Local Security Checks	4/14/2020	10/23/2024	high
135845	Scientific Linux Security Update : thunderbird on SL7.x x86_64 (20200416)	Nessus	Scientific Linux Local Security Checks	4/21/2020	12/6/2022	critical
150588	SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2020:14337-1)	Nessus	SuSE Local Security Checks	6/10/2021	4/25/2023	high
147407	NewStart CGSL MAIN 4.06 : firefox Multiple Vulnerabilities (NS-SA-2021-0004)	Nessus	NewStart CGSL Local Security Checks	3/10/2021	4/25/2023	critical

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