gitattributes parsing integer overflow in git

Summary

Git is distributed revision control system. gitattributes are a mechanism to allow defining attributes for paths. These attributes can be defined by adding a `.gitattributes` file to the repository, which contains a set of file patterns and the attributes that should be set for paths matching this pattern. When parsing gitattributes, multiple integer overflows can occur when there is a huge number of path patterns, a huge number of attributes for a single pattern, or when the declared attribute names are huge. These overflows can be triggered via a crafted `.gitattributes` file that may be part of the commit history. Git silently splits lines longer than 2KB when parsing gitattributes from a file, but not when parsing them from the index. Consequentially, the failure mode depends on whether the file exists in the working tree, the index or both. This integer overflow can result in arbitrary heap reads and writes, which may result in remote code execution. The problem has been patched in the versions published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. There are no known workarounds for this issue.

Timeline

1. Jan 17, 2023, 10:17 PM UTCCVE published
2. Oct 15, 2024, 5:36 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: total

3. Feb 13, 2025, 4:32 PM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• git git

  fixed in 2.30.7; From 2.31.0 · fixed in 2.31.6; From 2.32.0 · fixed in 2.32.5; From 2.33.0 · fixed in 2.33.6; From 2.34.0 · fixed in 2.34.6; From 2.35.0 · fixed in 2.35.6; From 2.36.0 · fixed in 2.36.4; From 2.37.0 · fixed in 2.37.5; From 2.38.0 · fixed in 2.38.3

References 3