Vulnerability in Apple macOS
CVE-2023-6857
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.
Vulnerability class: Race Condition
EPSS: 0.007 (48.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Apple Macos
- Google Android
- Linux Linux_kernel
- Mozilla Firefox — versions unspecified
- Mozilla Firefox Esr — versions unspecified
- Mozilla Firefox_esr
- Mozilla Thunderbird — versions unspecified
- Debian Debian_linux — versions 10.0, 11.0, 12.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@mozilla.org (Permissions Required, Issue Tracking)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Vendor Advisory)
- security@mozilla.org (Third Party Advisory)
- security@mozilla.org (Third Party Advisory)
- security@mozilla.org (Mailing List, Third Party Advisory)
- security@mozilla.org (Mailing List, Third Party Advisory)
- security@mozilla.org (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-6857?
- CVE-2023-6857 is a medium-severity vulnerability in Apple macOS, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.3/10. Published 2023-12-19.
- How severe is CVE-2023-6857?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2023-6857 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.