CVE-2023-4576: mozilla firefox Integer Overflow or Wraparound

Vulnerability summary

CVE-2023-4576 is a high (CVSS 8.6) Integer Overflow or Wraparound vulnerability in mozilla firefox. EPSS estimates a 0.82% chance of exploitation in the next 30 days, higher than 56.5% of scored vulnerabilities.

Timeline

1. 11-09-2023
   PublishedVulnerability first disclosed.
2. 18-12-2025
   Last modifiedVulnerability information updated.

Description

On Windows, an integer overflow could occur in `RecordedSourceSurfaceCreation` which resulted in a heap buffer overflow potentially leaking sensitive data that could have led to a sandbox escape. *This bug only affects Firefox on Windows. Other operating systems are unaffected.* This vulnerability affects Firefox < 117, Firefox ESR < 102.15, Firefox ESR < 115.2, Thunderbird < 102.15, and Thunderbird < 115.2.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.