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`.

CVSS breakdown

CVSS 3.1

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected products

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

Description

CVSS breakdown

Affected products

References