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  5. GHSA-xxmh-rf63-qwjv

GHSA-xxmh-rf63-qwjv: GitProxy Backfile Parsing Exploit

July 30, 2025

An attacker can craft a malicious Git packfile to exploit the PACK signature detection in the parsePush.ts. By embedding a misleading PACK signature within commit content and carefully constructing the packet structure, the attacker can trick the parser into treating invalid or unintended data as the packfile. Potentially, this would allow bypassing approval or hiding commits.

References

  • github.com/advisories/GHSA-xxmh-rf63-qwjv
  • github.com/finos/git-proxy
  • github.com/finos/git-proxy/commit/333c98a165a5a1ec88414db3d4a2c6f81e083e0f
  • github.com/finos/git-proxy/commit/a620a2f33c39c78e01783a274580bf822af3cc3a
  • github.com/finos/git-proxy/releases/tag/v1.19.2
  • github.com/finos/git-proxy/security/advisories/GHSA-xxmh-rf63-qwjv

Code Behaviors & Features

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Affected versions

All versions before 1.19.2

Fixed versions

  • 1.19.2

Solution

Upgrade to version 1.19.2 or above.

Weakness

  • CWE-290: Authentication Bypass by Spoofing

Source file

npm/@finos/git-proxy/GHSA-xxmh-rf63-qwjv.yml

Spotted a mistake? Edit the file on GitLab.

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