CVE-2023-6857

Summary

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.

Affected Software

Weaknesses

• Symlinks may resolve to smaller than expected buffers

ADP Enrichment

CVE Program Container

Additional 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

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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