CVE-2024-11704: Mozilla Firefox double free (CVSS 9.8)

Description

A double-free issue could have occurred in `sec_pkcs7_decoder_start_decrypt()` when handling an error path. Under specific conditions, the same symmetric key could have been freed twice, potentially leading to memory corruption. This vulnerability affects Firefox < 133, Thunderbird < 133, Firefox ESR < 128.7, and Thunderbird < 128.7.

CVSS 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Mozilla Firefox< 133.0 · < 128.7.0

Mozilla Thunderbird≥ 129.0 < 133.0 · < 128.7.0

Remediation

Fixed in

Mozilla Firefox≥ 133.0

Mozilla Thunderbird≥ 133.0

Patch & vendor advisories

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1899402Issue TrackingPermissions Required
https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html
https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html
https://www.mozilla.org/security/advisories/mfsa2024-63/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2024-67/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-09/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2025-10/Vendor Advisory

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

Frequently asked

Is CVE-2024-11704 being actively exploited?

CVE-2024-11704 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.91%.

How severe is CVE-2024-11704?

CVE-2024-11704 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.91% probability of exploitation.

Which products are affected by CVE-2024-11704?

Affected products include Mozilla Firefox, Mozilla Thunderbird.

How do I fix CVE-2024-11704?

Upgrade affected software to a fixed version, for example Mozilla Firefox 133.0, Mozilla Thunderbird 133.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-11704 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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