Detections
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Mozilla Firefox ESR < 128.6

high Nessus Plugin ID 213532

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Synopsis

A web browser installed on the remote Windows host is affected by multiple vulnerabilities.

Description

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)

 - 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)

 - Parsing a JavaScript module as JSON could under some circumstances cause cross-compartment access, which may result in a use-after-free. (CVE-2025-0240)

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

Solution

Upgrade to Mozilla Firefox ESR version 128.6 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2025-02/

Plugin Details

Severity: High

ID: 213532

File Name: mozilla_firefox_128_6_esr.nasl

Version: 1.5

Type: local

Agent: windows

Family: Windows

Published: 1/7/2025

Updated: 2/6/2025

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.3

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2025-0242

CVSS v3

Risk Factor: High

Base Score: 7.7

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS Score Source: CVE-2025-0241

Vulnerability Information

CPE: cpe:/a:mozilla:firefox_esr

Required KB Items: Mozilla/Firefox/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 1/7/2025

Vulnerability Publication Date: 1/7/2025

Reference Information

CVE: CVE-2025-0237, CVE-2025-0238, CVE-2025-0239, CVE-2025-0240, CVE-2025-0241, CVE-2025-0242, CVE-2025-0243

IAVA: 2025-A-0009-S