Git security audit: Inside the hunt for - and discovery of - CVEs

Participating in an open-source security audit of Git, funded by the Open Source Technology Improvement Fund and conducted by X41 D-Sec, led to the discovery of the critical vulnerability CVE-2022-41903. This collaborative effort involved members from GitLab's security team, including the author, who was eager to join the audit due to previous experiences with Git vulnerabilities. The team efficiently set up a collaboration environment using GitLab's infrastructure, allowing them to document findings and communicate effectively. The audit focused on high-priority areas within Git's extensive codebase, revealing the vulnerability through an intricate process of examining less obvious features and documentation. The discovery of CVE-2022-41903, related to the handling of padding specifiers in Git's pretty format, prompted early communication with the git-security mailing list to maintain discretion while addressing the issue. This collaboration not only highlighted the importance of thorough security audits but also strengthened Git's security, benefiting both GitLab and the broader software development community.

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