CVE-2023-22490

Dashboard / Vulnerabilities / CVE-2023-22490

CVE-2023-22490

Summary: Git vulnerable to local clone-based data exfiltration with non-local transports

Details: Git is a revision control system. Using a specially-crafted repository, Git prior to versions 2.39.2, 2.38.4, 2.37.6, 2.36.5, 2.35.7, 2.34.7, 2.33.7, 2.32.6, 2.31.7, and 2.30.8 can be tricked into using its local clone optimization even when using a non-local transport. Though Git will abort local clones whose source `$GIT_DIR/objects` directory contains symbolic links, the `objects` directory itself may still be a symbolic link. These two may be combined to include arbitrary files based on known paths on the victim's filesystem within the malicious repository's working copy, allowing for data exfiltration in a similar manner as CVE-2022-39253. A fix has been prepared and will appear in v2.39.2 v2.38.4 v2.37.6 v2.36.5 v2.35.7 v2.34.7 v2.33.7 v2.32.6, v2.31.7 and v2.30.8. If upgrading is impractical, two short-term workarounds are available. Avoid cloning repositories from untrusted sources with `--recurse-submodules`. Instead, consider cloning repositories without recursively cloning their submodules, and instead run `git submodule update` at each layer. Before doing so, inspect each new `.gitmodules` file to ensure that it does not contain suspicious module URLs.

References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/22xxx/CVE-2023-22490.json, https://github.com/git/git/security/advisories/GHSA-3wp6-j8xr-qw85, https://github.com/git/git/security/advisories/GHSA-gw92-x3fm-3g3q, https://nvd.nist.gov/vuln/detail/CVE-2023-22490, https://security.gentoo.org/glsa/202312-15, https://github.com/git/git/commit/c867e4fa180bec4750e9b54eb10f459030dbebfd