go-git is an extensible git implementation library written in pure Go. Prior to 5.19.0 and 6.0.0-alpha.3, go-git may parse malformed Git objects in a way that differs from upstream Git. When commit or tag objects contain ambiguous or malformed headers, go-git’s decoded representation may expose values differently from how Git itself would interpret or reject the same object. Additionally, go-git’s commit signing and verification logic operates over commit data reconstructed from go-git’s parsed representation rather than the original raw object bytes. As a result, go-git may sign or verify a commit payload that is not byte-for-byte equivalent to the object stored in the repository. This can cause a signature to appear valid for a commit whose displayed or effective metadata differs from the object that was intended to be signed. This vulnerability is fixed in 5.19.0 and 6.0.0-alpha.3.
Weakness
The product validates input before it is canonicalized, which prevents the product from detecting data that becomes invalid after the canonicalization step.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Go-git | Go-git_project | * | 5.19.0 (excluding) |
| Go-git | Go-git_project | 6.0.0-alpha1 (including) | 6.0.0-alpha1 (including) |
| Go-git | Go-git_project | 6.0.0-alpha2 (including) | 6.0.0-alpha2 (including) |
| Golang-github-go-git-go-git | Ubuntu | upstream | * |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/267.html
- https://cwe.mitre.org/data/definitions/3.html
- https://cwe.mitre.org/data/definitions/71.html
- https://cwe.mitre.org/data/definitions/78.html
- https://cwe.mitre.org/data/definitions/79.html
- https://cwe.mitre.org/data/definitions/80.html