CVE-2024-11704: firefox Double Free — Fix

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.

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CVSS v3.1 Score

9.8

CRITICAL

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

Weakness Type (CWE)

CWE-415 CWE-415

Affected Products

Vendor	Product	Versions
mozilla	firefox	< 128.7.0
mozilla	firefox	< 133.0
mozilla	thunderbird	< 128.7.0
mozilla	thunderbird	129.0 — 133.0

References

Advisories & Patches

https://www.mozilla.org/security/advisories/mfsa2024-63/ https://www.mozilla.org/security/advisories/mfsa2024-67/ https://www.mozilla.org/security/advisories/mfsa2025-09/ https://www.mozilla.org/security/advisories/mfsa2025-10/

Other References

https://bugzilla.mozilla.org/show_bug.cgi?id=1899402 https://lists.debian.org/debian-lts-announce/2025/02/msg00005.html https://lists.debian.org/debian-lts-announce/2025/02/msg00006.html

Frequently Asked Questions

What is CVE-2024-11704? +

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2024-11704? +

CVE-2024-11704 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2024-11704? +

CVE-2024-11704 affects products from mozilla, specifically: firefox, thunderbird. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-11704? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2024-11704