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CVE-2024-11696

MEDIUM
5.4
CVSS Score
Published: November 26, 2024 at 01:33 PM UTC
Updated: June 17, 2026 at 06:58 AM UTC
3 products affected across 1 vendorFirefoxThunderbirdFirefox ESR

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Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

The application failed to account for exceptions thrown by the `loadManifestFromFile` method during add-on signature verification. This flaw, triggered by an invalid or unsupported extension manifest, could have caused runtime errors that disrupted the signature validation process. As a result, the enforcement of signature validation for unrelated add-ons may have been bypassed. Signature validation in this context is used to ensure that third-party applications on the user's computer have not tampered with the user's extensions, limiting the impact of this issue. This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Firefox· Mozilla
95%
v < 128.5.0v < 133v < 133.0
Affected range stops below 128.5.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 133, so it looks safe — our inference, not a vendor statement
Affected range stops below 133.0, so it looks safe — our inference, not a vendor statement
Thunderbird· Mozilla
95%
v < 128.5v < 128.5.0v < 133129.0 ≤ v < 133.0
Affected range stops below 128.5, so it looks safe — our inference, not a vendor statement
Affected range stops below 128.5.0, so it looks safe — our inference, not a vendor statement
Affected range stops below 133, so it looks safe — our inference, not a vendor statement
Affected range stops below 133.0, so it looks safe — our inference, not a vendor statement
Firefox ESR· Mozilla
60%
v < 128.5
Affected range stops below 128.5, so it looks safe — our inference, not a vendor statement

References (6)

Issue Tracking
Source: [email protected]
https://bugzilla.mozilla.org/show_bug.cgi?id=1929600
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-63/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-64/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-67/
Vendor Advisory
Source: [email protected]
https://www.mozilla.org/security/advisories/mfsa2024-68/
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2024/11/msg00029.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.4MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-347

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