CVE-2022-41903
Description
Git is distributed revision control system. `git log` can display commits in an arbitrary format using its `--format` specifiers. This functionality is also exposed to `git archive` via the `export-subst` gitattribute. When processing the padding operators, there is a integer overflow in `pretty.c::format_and_pad_commit()` where a `size_t` is stored improperly as an `int`, and then added as an offset to a `memcpy()`. This overflow can be triggered directly by a user running a command which invokes the commit formatting machinery (e.g., `git log --format=...`). It may also be triggered indirectly through git archive via the export-subst mechanism, which expands format specifiers inside of files within the repository during a git archive. This integer overflow can result in arbitrary heap writes, which may result in arbitrary code execution. The problem has been patched in the versions published on 2023-01-17, going back to v2.30.7. Users are advised to upgrade. Users who are unable to upgrade should disable `git archive` in untrusted repositories. If you expose git archive via `git daemon`, disable it by running `git config --global daemon.uploadArch false`.
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| git-scm git | v ≤ 2.30.6, 2.31.0 ≤ v ≤ 2.31.5, 2.32.0 ≤ v ≤ 2.32.4, 2.33.0 ≤ v ≤ 2.33.5, 2.34.0 ≤ v ≤ 2.34.5, 2.35.0 ≤ v ≤ 2.35.5, 2.36.0 ≤ v ≤ 2.36.3, 2.37.0 ≤ v ≤ 2.37.4, 2.38.0 ≤ v ≤ 2.38.2, 2.39.0 | — |
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