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CVE-2023-6857

Published: Dec 19, 2023

Modified: Feb 13, 2025

PUBLISHED

Description

When resolving a symlink, a race may occur where the buffer passed to `readlink` may actually be smaller than necessary. *This bug only affects Firefox on Unix-based operating systems (Android, Linux, MacOS). Windows is unaffected.* This vulnerability affects Firefox ESR < 115.6, Thunderbird < 115.6, and Firefox < 121.

Vendor	Product	Versions
Mozilla	Firefox ESR	affected `unspecified - < 115.6`
Mozilla	Thunderbird	affected `unspecified - < 115.6`
Mozilla	Firefox	affected `unspecified - < 121`

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1796023

https://www.mozilla.org/security/advisories/mfsa2023-54/

https://www.mozilla.org/security/advisories/mfsa2023-55/

https://www.mozilla.org/security/advisories/mfsa2023-56/

https://www.debian.org/security/2023/dsa-5581

https://www.debian.org/security/2023/dsa-5582

https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html

https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html

https://security.gentoo.org/glsa/202401-10

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