Symlink Resolution Race Condition Vulnerability in Firefox ESR, Thunderbird, and Firefox

Symlink Resolution Race Condition Vulnerability in Firefox ESR, Thunderbird, and Firefox

CVE-2023-6857 · MEDIUM Severity

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

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.

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