CVE-2023-6857

medium

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.

References

Advisories
More

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

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

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

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

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

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

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

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

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

Details

Source: Mitre, NVD

Published: 2023-12-19

Updated: 2024-02-02

Risk Information

CVSS v2

Base Score: 5.4

Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:C/A:N

Severity: Medium

CVSS v3

Base Score: 5.3

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Severity: Medium

EPSS

EPSS: 0.00495