The version of Firefox installed on the remote macOS or Mac OS X host is prior to 114.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2023-20 advisory.

  - Mozilla developers and community members Andrew McCreight, Randell Jesup, and the Mozilla Fuzzing Team     reported memory safety bugs present in Firefox 113. 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-2023-34417)

  - The error page for sites with invalid TLS certificates was missing the activation-delay Firefox uses to     protect prompts and permission dialogs from attacks that exploit human response time delays. If a     malicious page elicited user clicks in precise locations immediately before navigating to a site with a     certificate error and made the renderer extremely busy at the same time, it could create a gap between     when the error page was loaded and when the display actually refreshed. With the right timing the elicited     clicks could land in that gap and  activate the button that overrides the certificate error for that site.
    (CVE-2023-34414)

  - When choosing a site-isolated process for a document loaded from a data: URL that was the result of a     redirect, Firefox would load that document in the same process as the site that issued the redirect. This     bypassed the site-isolation protections against Spectre-like attacks on sites that host an open     redirect. Firefox no longer follows HTTP redirects to data: URLs. (CVE-2023-34415)

  - Mozilla developers and community members Gabriele Svelto, Andrew McCreight, the Mozilla Fuzzing Team, Sean     Feng, and Sebastian Hengst reported memory safety bugs present in Firefox 113 and Firefox ESR 102.11. 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-2023-34416)

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

The remote Fedora 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-af4cfc9c3c advisory.

    - Updated to latest upstream (114.0)

Tenable has extracted the preceding description block directly from the Fedora 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 version of Firefox installed on the remote Windows host is prior to 114.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2023-20 advisory.

  - Mozilla developers and community members Andrew McCreight, Randell Jesup, and the Mozilla Fuzzing Team     reported memory safety bugs present in Firefox 113. 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-2023-34417)

  - The error page for sites with invalid TLS certificates was missing the activation-delay Firefox uses to     protect prompts and permission dialogs from attacks that exploit human response time delays. If a     malicious page elicited user clicks in precise locations immediately before navigating to a site with a     certificate error and made the renderer extremely busy at the same time, it could create a gap between     when the error page was loaded and when the display actually refreshed. With the right timing the elicited     clicks could land in that gap and  activate the button that overrides the certificate error for that site.
    (CVE-2023-34414)

  - When choosing a site-isolated process for a document loaded from a data: URL that was the result of a     redirect, Firefox would load that document in the same process as the site that issued the redirect. This     bypassed the site-isolation protections against Spectre-like attacks on sites that host an open     redirect. Firefox no longer follows HTTP redirects to data: URLs. (CVE-2023-34415)

  - Mozilla developers and community members Gabriele Svelto, Andrew McCreight, the Mozilla Fuzzing Team, Sean     Feng, and Sebastian Hengst reported memory safety bugs present in Firefox 113 and Firefox ESR 102.11. 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-2023-34416)

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 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6143-1 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, obtain     sensitive information across domains, or execute arbitrary code. (CVE-2023-34414, CVE-2023-34416,     CVE-2023-34417)

    Jun Kokatsu discovered that Firefox did not properly validate site-isolated process for a document loaded     from a data: URL that was the result of a redirect, leading to an open redirect attack. An attacker could     possibly use this issue to perform phishing attacks. (CVE-2023-34415)

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.

The remote Fedora 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-e5859237ff advisory.

    - Updated to latest upstream (114.0)

Tenable has extracted the preceding description block directly from the Fedora 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 host is affected by the vulnerability described in GLSA-202401-10 (Mozilla Firefox: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in Mozilla Firefox. Please review the CVE identifiers     referenced below for details.

Tenable has extracted the preceding description block directly from the Gentoo 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
176740	Mozilla Firefox < 114.0	Nessus	MacOS X Local Security Checks	6/6/2023	11/18/2025	critical
177647	Fedora 38 : firefox (2023-af4cfc9c3c)	Nessus	Fedora Local Security Checks	6/27/2023	11/14/2024	critical
176741	Mozilla Firefox < 114.0	Nessus	Windows	6/6/2023	11/18/2025	critical
176886	Ubuntu 20.04 LTS : Firefox vulnerabilities (USN-6143-1)	Nessus	Ubuntu Local Security Checks	6/7/2023	8/28/2024	critical
177483	Fedora 37 : firefox (2023-e5859237ff)	Nessus	Fedora Local Security Checks	6/22/2023	11/15/2024	critical
187727	GLSA-202401-10 : Mozilla Firefox: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	1/9/2024	9/25/2025	critical

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