Multiple security issues have been found in the Mozilla Firefox web browser, which could potentially result in the execution of arbitrary code, information disclosure, privilege escalation or spoofing.

For Debian 9 stretch, these problems have been fixed in version 78.10.0esr-1~deb9u1.

We recommend that you upgrade your firefox-esr packages.

For the detailed security status of firefox-esr please refer to its security tracker page at:
https://security-tracker.debian.org/tracker/firefox-esr

NOTE: Tenable Network Security has extracted the preceding description block directly from the DLA 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-2021-1353 advisory.

    [78.10.0-1.0.1]
    - Replaced thunderbird-redhat-default-prefs.js with thunderbird-oracle-default-prefs.js

    [78.10.0-1]
    - Update to 78.10.0

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 CentOS Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the CESA-2021:1360 advisory.

  - Mozilla: More internal network hosts could have been probed by a malicious webpage (CVE-2021-23961)

  - Mozilla: Out of bound write due to lazy initialization (CVE-2021-23994)

  - Mozilla: Use-after-free in Responsive Design Mode (CVE-2021-23995)

  - Mozilla: Secure Lock icon could have been spoofed (CVE-2021-23998)

  - Mozilla: Blob URLs may have been granted additional privileges (CVE-2021-23999)

  - Mozilla: Arbitrary FTP command execution on FTP servers using an encoded URL (CVE-2021-24002)

  - Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads (CVE-2021-29945)

  - Mozilla: Port blocking could be bypassed (CVE-2021-29946)

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

The remote NewStart CGSL host, running version CORE 5.04 / MAIN 5.04, has firefox packages installed that are affected by multiple vulnerabilities:

  - Further techniques that built on the slipstream research combined with a malicious webpage could have     exposed both an internal network's hosts as well as services running on the user's local machine. This     vulnerability affects Firefox < 85. (CVE-2021-23961)

  - A WebGL framebuffer was not initialized early enough, resulting in memory corruption and an out of bound     write. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
    (CVE-2021-23994)

  - When Responsive Design Mode was enabled, it used references to objects that were previously freed. We     presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability     affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88. (CVE-2021-23995)

  - Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon     from an HTTPS page. This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88.
    (CVE-2021-23998)

  - If a Blob URL was loaded through some unusual user interaction, it could have been loaded by the System     Principal and granted additional privileges that should not be granted to web content. This vulnerability     affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88. (CVE-2021-23999)

  - When a user clicked on an FTP URL containing encoded newline characters (%0A and %0D), the newlines would     have been interpreted as such and allowed arbitrary commands to be sent to the FTP server. This     vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88. (CVE-2021-24002)

  - The WebAssembly JIT could miscalculate the size of a return type, which could lead to a null read and     result in a crash. *Note: This issue only affected x86-32 platforms. Other platforms are unaffected.*.
    This vulnerability affects Firefox ESR < 78.10, Thunderbird < 78.10, and Firefox < 88. (CVE-2021-29945)

  - Ports that were written as an integer overflow above the bounds of a 16-bit integer could have bypassed     port blocking restrictions when used in the Alt-Svc header. This vulnerability affects Firefox ESR <     78.10, Thunderbird < 78.10, and Firefox < 88. (CVE-2021-29946)

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

The remote MiracleLinux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the AXSA:2021-1733:13 advisory.

    * Mozilla: Out of bound write due to lazy initialization (CVE-2021-23994)
      * Mozilla: Use-after-free in Responsive Design Mode (CVE-2021-23995)
      * Mozilla: More internal network hosts could have been probed by a malicious webpage (CVE-2021-23961)
      * Mozilla: Secure Lock icon could have been spoofed (CVE-2021-23998)
      * Mozilla: Blob URLs may have been granted additional privileges (CVE-2021-23999)
      * Mozilla: Arbitrary FTP command execution on FTP servers using an encoded URL (CVE-2021-24002)
      * Mozilla: Incorrect size computation in WebAssembly JIT could lead to null-reads (CVE-2021-29945)
      * Mozilla: Port blocking could be bypassed (CVE-2021-29946)

Tenable has extracted the preceding description block directly from the MiracleLinux 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
149008	Debian DLA-2633-1 : firefox-esr security update	Nessus	Debian Local Security Checks	4/27/2021	1/12/2024	high
149021	Oracle Linux 8 : thunderbird (ELSA-2021-1353)	Nessus	Oracle Linux Local Security Checks	4/27/2021	10/23/2024	high
149237	CentOS 8 : firefox (CESA-2021:1360)	Nessus	CentOS Local Security Checks	5/3/2021	1/2/2024	high
154623	NewStart CGSL CORE 5.04 / MAIN 5.04 : firefox Multiple Vulnerabilities (NS-SA-2021-0107)	Nessus	NewStart CGSL Local Security Checks	10/28/2021	11/27/2023	high
294525	MiracleLinux 8 : firefox-78.10.0-1.0.1.el8 (AXSA:2021-1733:13)	Nessus	Miracle Linux Local Security Checks	1/20/2026	1/20/2026	high

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