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CVE PROGRAM SOURCE RECORD9.8 Critical

CVE-2022-41903

Integer overflow in `git archive`, `git log --format` leading to RCE in git

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Status
Published
Published
Updated
Assigning organization
GitHub_M

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`.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

git git

  • < 2.30.7affected
  • >= 2.31.0, < 2.31.6affected
  • >= 2.32.0, < 2.32.5affected
  • >= 2.33.0, < 2.33.6affected
  • >= 2.34.0, < 2.34.6affected
  • >= 2.35.0, < 2.35.6affected
  • >= 2.36.0, < 2.36.4affected
  • >= 2.37.0, < 2.37.5affected
  • >= 2.38.0, < 2.38.3affected
  • = 2.39.0affected

References