Multiple security issues were discovered in Thunderbird, which could result in the execution of arbitrary code or information disclosure.
In addition a number of security issues were addressed in the OpenPGP support.

The remote NewStart CGSL host, running version MAIN 6.02, 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 Redhat Enterprise Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2021:1350 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    This update upgrades Thunderbird to version 78.10.0.

    Security Fix(es):

    * 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)

    * Mozilla: Race condition when reading from disk while verifying signatures (CVE-2021-29948)

    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-2021:1361 advisory.

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

    This update upgrades Firefox to version 78.10.0 ESR.

    Security Fix(es):

    * 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)

    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 Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4926-1 advisory.

    Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially     crafted website, an attacker could potentially exploit these to cause a denial of service, spoof the     browser UI, bypass security restrictions, trick the user into disclosing confidential information, or     execute arbitrary code. (CVE-2021-23994, CVE-2021-23996, CVE-2021-23997, CVE-2021-23998, CVE-2021-23999,     CVE-2021-24000, CVE-2021-24001, CVE-2021-29945, CVE-2021-29946, CVE-2021-29947)

    A use-after-free was discovered when Responsive Design Mode was enabled. If a user were tricked into     opening a specially crafted website with Responsive Design Mode enabled, an attacker could potentially     exploit this to cause a denial of service, or execute arbitrary code. (CVE-2021-23995)

    It was discovered that Firefox mishandled ftp URLs with encoded newline characters. If a user were tricked     into clicking on a specially crafted link, an attacker could potentially exploit this to send arbitrary     FTP commands. (CVE-2021-24002)

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

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

This update for MozillaFirefox fixes the following issues :

Firefox was updated to 78.10.0 ESR (bsc#1184960)

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

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

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

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

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

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

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

  - CVE-2021-29946: Port blocking could be bypassed

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 SUSE Linux SLES11 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2021:14708-1 advisory.

  - 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.  (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.  (CVE-2021-23995)

  - Through complicated navigations with new windows, an HTTP page could have inherited a secure lock icon     from an HTTPS page.  (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.  (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.
    (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.
    (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.  (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.

ID	Name	Product	Family	Published	Updated	Severity
148964	Debian DSA-4897-1 : thunderbird - security update	Nessus	Debian Local Security Checks	4/23/2021	1/12/2024	high
154502	NewStart CGSL MAIN 6.02 : firefox Multiple Vulnerabilities (NS-SA-2021-0131)	Nessus	NewStart CGSL Local Security Checks	10/27/2021	11/27/2023	high
148981	RHEL 7 : thunderbird (RHSA-2021:1350)	Nessus	Red Hat Local Security Checks	4/26/2021	11/7/2024	high
148989	RHEL 8 : firefox (RHSA-2021:1361)	Nessus	Red Hat Local Security Checks	4/26/2021	11/8/2024	high
148992	Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Firefox vulnerabilities (USN-4926-1)	Nessus	Ubuntu Local Security Checks	4/26/2021	8/28/2024	high
149035	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:1325-1)	Nessus	SuSE Local Security Checks	4/28/2021	1/3/2024	high
150617	SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2021:14708-1)	Nessus	SuSE Local Security Checks	6/10/2021	12/26/2023	high

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