CVE-2023-25815
What it is
In Git for Windows, the Windows port of Git, no localized messages are shipped with the installer. As a consequence, Git is expected not to localize messages at all, and skips the gettext initialization. However, due to a change in MINGW-packages, the `gettext()` function's implicit initialization no longer uses the runtime prefix but uses the hard-coded path `C:\mingw64\share\locale` to look for localized messages. And since any authenticated user has the permission to create folders in `C:\` (and since `C:\mingw64` does not typically exist), it is possible for low-privilege users to place fake messages in that location where `git.exe` will pick them up in version 2.40.1. This vulnerability is relatively hard to exploit and requires social engineering. For example, a legitimate message at the end of a clone could be maliciously modified to ask the user to direct their web browser to a malicious website, and the user might think that the message comes from Git and is legitimate. It does require local write access by the attacker, though, which makes this attack vector less likely. Version 2.40.1 contains a patch for this issue. Some workarounds are available. Do not work on a Windows machine with shared accounts, or alternatively create a `C:\mingw64` folder and leave it empty. Users who have administrative rights may remove the permission to create folders in `C:\`.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account, but needs a user to act. Limited direct impact.
- Exploit odds
- 0.8% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.8% in the next 30 days (EPSS).
- Severity: 3.3 LOW (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.8% · EPSS, next 30 days
- Weakness
- CWE-22 · Path traversal
- Record status
- Modified
Affected
- Git For Windows Project Git For Windows < 2.40.1
- Fedoraproject Fedora 37
- Fedoraproject Fedora 38
Attack profile CVSS 3.1 · 3.3
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- Required
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- Low
- Availability
- Low
Raw vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:L/A:L
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2023-25815.md and follow it. Check whether this project is affected by CVE-2023-25815. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://github.com/git-for-windows/git/releases/tag/v2.40.1.windows.1
- https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8
- https://github.com/msys2/MINGW-packages/pull/10461
- https://github.com/git-for-windows/git/releases/tag/v2.40.1.windows.1
- https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8
- https://github.com/msys2/MINGW-packages/pull/10461
References
- http://www.openwall.com/lists/oss-security/2023/04/25/2
- https://axcheron.github.io/exploit-101-format-strings/#writing-to-the-stack
- https://github.com/git-for-windows/git/releases/tag/v2.40.1.windows.1
- https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8
- https://github.com/msys2/MINGW-packages/pull/10461
- https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PI7FZ4NNR5S5J5K6AMVQBH2JFP6NE4L7/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/RKOXOAZ42HLXHXTW6JZI4L5DAIYDTYCU/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/YFZWGQKB6MM5MNF2DLFTD7KS2KWPICKL/
- https://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html
- https://security.gentoo.org/glsa/202312-15
- http://www.openwall.com/lists/oss-security/2023/04/25/2
- https://axcheron.github.io/exploit-101-format-strings/#writing-to-the-stack
- https://github.com/git-for-windows/git/releases/tag/v2.40.1.windows.1
- https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8
- https://github.com/msys2/MINGW-packages/pull/10461
- https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html
- https://lists.debian.org/debian-lts-announce/2024/09/msg00009.html
- https://lists.fedoraproject.org/archives/list/[email protected]/message/PI7FZ4NNR5S5J5K6AMVQBH2JFP6NE4L7/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/RKOXOAZ42HLXHXTW6JZI4L5DAIYDTYCU/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/YFZWGQKB6MM5MNF2DLFTD7KS2KWPICKL/
- https://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html
- https://security.gentoo.org/glsa/202312-15