The version of Firefox ESR installed on the remote Windows host is prior to 128.6. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-02 advisory.

  - Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5,     Thunderbird 115.18, and Thunderbird 128.5. 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-2025-0242)

  - When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially     exploitable crash. (CVE-2025-0241)

  - The WebChannel API, which is used to transport various information across processes, did not check the     sending principal but rather accepted the principal being sent. This could have led to privilege     escalation attacks. (CVE-2025-0237)

  - Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to     a potentially exploitable crash. (CVE-2025-0238)

  - When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to     an insecure site. (CVE-2025-0239)

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-2025:0132 advisory.

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

    Security Fix(es):

    * firefox: Use-after-free when breaking lines in text (CVE-2025-0238)

    * firefox: Memory corruption when using JavaScript Text Segmentation (CVE-2025-0241)

    * firefox: Alt-Svc ALPN validation failure when redirected (CVE-2025-0239)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and     Thunderbird 128.6 (CVE-2025-0243)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19,     Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 (CVE-2025-0242)

    * firefox: WebChannel APIs susceptible to confused deputy attack (CVE-2025-0237)

    * firefox: Compartment mismatch when parsing JavaScript JSON module (CVE-2025-0240)

    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-2025:0133 advisory.

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

    Security Fix(es):

    * firefox: Use-after-free when breaking lines in text (CVE-2025-0238)

    * firefox: Memory corruption when using JavaScript Text Segmentation (CVE-2025-0241)

    * firefox: Alt-Svc ALPN validation failure when redirected (CVE-2025-0239)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and     Thunderbird 128.6 (CVE-2025-0243)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19,     Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 (CVE-2025-0242)

    * firefox: WebChannel APIs susceptible to confused deputy attack (CVE-2025-0237)

    * firefox: Compartment mismatch when parsing JavaScript JSON module (CVE-2025-0240)

    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-2025:0137 advisory.

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

    Security Fix(es):

    * firefox: Use-after-free when breaking lines in text (CVE-2025-0238)

    * firefox: Memory corruption when using JavaScript Text Segmentation (CVE-2025-0241)

    * firefox: Alt-Svc ALPN validation failure when redirected (CVE-2025-0239)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and     Thunderbird 128.6 (CVE-2025-0243)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19,     Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 (CVE-2025-0242)

    * firefox: WebChannel APIs susceptible to confused deputy attack (CVE-2025-0237)

    * firefox: Compartment mismatch when parsing JavaScript JSON module (CVE-2025-0240)

    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 SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:0056-1 advisory.

    - Firefox Extended Support Release 128.6.0 ESR
      * Fixed: Various security fixes.

      MFSA 2025-02 (bsc#1234991)
      * CVE-2025-0237 (bmo#1915257)         WebChannel APIs susceptible to confused deputy attack
      * CVE-2025-0238 (bmo#1915535)         Use-after-free when breaking lines
      * CVE-2025-0239 (bmo#1929156)         Alt-Svc ALPN validation failure when redirected
      * CVE-2025-0240 (bmo#1929623)         Compartment mismatch when parsing JavaScript JSON module
      * CVE-2025-0241 (bmo#1933023)         Memory corruption when using JavaScript Text Segmentation
      * CVE-2025-0242 (bmo#1874523, bmo#1926454, bmo#1931873,         bmo#1932169)         Memory safety bugs fixed in Firefox 134, Thunderbird 134,         Firefox ESR 115.19, Firefox ESR 128.6, Thunderbird 115.19,         and Thunderbird 128.6
      * CVE-2025-0243 (bmo#1827142, bmo#1932783)         Memory safety bugs fixed in Firefox 134, Thunderbird 134,         Firefox ESR 128.6, and Thunderbird 128.6

    - Firefox Extended Support Release 128.5.2 ESR
      * Fixed: Fixed a crash experienced by Windows users with Qihoo         360 Total Security Antivirus software installed (bmo#1934258)

Tenable has extracted the preceding description block directly from the SUSE 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 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2025-0144 advisory.

    [128.6.0-1.0.1]
    - Fix firefox-oracle-default-prefs.js for new nss [Orabug: 37079789]

    [128.6.0]
    - Add debranding patches (Mustafa Gezen)
    - Add OpenELA default preferences (Louis Abel)

    [128.6.0-1]
    - Update to 128.6.0 build1

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 Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4011 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4011-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/               Emilio Pozuelo Monfort     January 11, 2025                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : firefox-esr     Version        : 128.6.0esr-1~deb11u3     CVE ID         : CVE-2025-0237 CVE-2025-0238 CVE-2025-0239 CVE-2025-0240                      CVE-2025-0241 CVE-2025-0242 CVE-2025-0243

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

    For Debian 11 bullseye, these problems have been fixed in version     128.6.0esr-1~deb11u3.

    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

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 Thunderbird installed on the remote macOS or Mac OS X host is prior to 128.6. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-05 advisory.

  - Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5,     Thunderbird 115.18, and Thunderbird 128.5. 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-2025-0242)

  - When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially     exploitable crash. (CVE-2025-0241)

  - The WebChannel API, which is used to transport various information across processes, did not check the     sending principal but rather accepted the principal being sent. This could have led to privilege     escalation attacks. (CVE-2025-0237)

  - Assuming a controlled failed memory allocation, an attacker could have caused a use-after-free, leading to     a potentially exploitable crash. (CVE-2025-0238)

  - When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to     an insecure site. (CVE-2025-0239)

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-2025:0281 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    Security Fix(es):

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 128.6, and     Thunderbird 128.6 (CVE-2025-0243)

    * firefox: thunderbird: Memory safety bugs fixed in Firefox 134, Thunderbird 134, Firefox ESR 115.19,     Firefox ESR 128.6, Thunderbird 115.19, and Thunderbird 128.6 (CVE-2025-0242)

    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
213532	Mozilla Firefox ESR < 128.6	Nessus	Windows	1/7/2025	11/18/2025	high
213619	RHEL 7 : firefox (RHSA-2025:0132)	Nessus	Red Hat Local Security Checks	1/9/2025	6/5/2025	high
213637	RHEL 8 : firefox (RHSA-2025:0133)	Nessus	Red Hat Local Security Checks	1/9/2025	6/5/2025	high
213638	RHEL 8 : firefox (RHSA-2025:0137)	Nessus	Red Hat Local Security Checks	1/9/2025	6/5/2025	high
213687	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2025:0056-1)	Nessus	SuSE Local Security Checks	1/10/2025	2/6/2025	high
213961	Oracle Linux 8 : firefox (ELSA-2025-0144)	Nessus	Oracle Linux Local Security Checks	1/11/2025	9/11/2025	high
213986	Debian dla-4011 : firefox-esr - security update	Nessus	Debian Local Security Checks	1/11/2025	1/31/2025	high
214012	Mozilla Thunderbird < 128.6	Nessus	MacOS X Local Security Checks	1/13/2025	11/18/2025	high
214062	RHEL 8 : thunderbird (RHSA-2025:0281)	Nessus	Red Hat Local Security Checks	1/14/2025	6/5/2025	high

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