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CVE-2023-6857

Date: December 19, 2023

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.

Language: C++

Severity Score

Related Resources (12)

https://www.mozilla.org/security/advisories/mfsa2023-56/
https://www.debian.org/security/2023/dsa-5581
https://nvd.nist.gov/vuln/detail/CVE-2023-6857
https://lists.debian.org/debian-lts-announce/2023/12/msg00021.html
https://www.debian.org/security/2023/dsa-5582
https://bugzilla.mozilla.org/show_bug.cgi?id=1796023
https://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
https://security.gentoo.org/glsa/202401-10
https://security-tracker.debian.org/tracker/CVE-2023-6857
https://www.mozilla.org/security/advisories/mfsa2023-55/
https://www.mozilla.org/security/advisories/mfsa2023-54/
https://www.mend.io/vulnerability-database/CVE-2023-6857

Severity Score

Weakness Type (CWE)

Race Conditions

CWE-362

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): REQUIRED
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

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