Git for Windows is the Windows port of Git. Versions prior to 2.53.0.windows.3 do not have protections that prevent attackers from obtaining a user's NTLM hash. The NTLM hash can be obtained by tricking users into cloning a malicious repository, or checking out a malicious branch, that accesses an attacker-controlled server.
By default, NTLM authentication does not need any user interaction. By brute-forcing the NTLMv2 hash (which is expensive, but possible), credentials can be extracted. This issue has been fixed in version 2.53.0.windows.3.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
References 5
https://github.com/git-for-windows/git/releases/tag/v2.53.0.windows.3
security-advisories@github.com
https://github.com/git-for-windows/git/security/advisories/GHSA-9j5h-h4m7-85hx
security-advisories@github.com
https://learn.microsoft.com/en-au/windows/whats-new/deprecated-features#:~:text…
security-advisories@github.com
https://support.microsoft.com/en-us/topic/upcoming-changes-to-ntlmv1-in-windows…
security-advisories@github.com
https://techcommunity.microsoft.com/blog/windows-itpro-blog/the-evolution-of-wi…
security-advisories@github.com