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CVE-2023-25815 Detail

Description

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:\`.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.openwall.com/lists/oss-security/2023/04/25/2 Mailing List  Third Party Advisory 
http://www.openwall.com/lists/oss-security/2023/04/25/2 Mailing List  Third Party Advisory 
https://axcheron.github.io/exploit-101-format-strings/#writing-to-the-stack Product 
https://axcheron.github.io/exploit-101-format-strings/#writing-to-the-stack Product 
https://github.com/git-for-windows/git/releases/tag/v2.40.1.windows.1 Release Notes 
https://github.com/git-for-windows/git/releases/tag/v2.40.1.windows.1 Release Notes 
https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8 Vendor Advisory 
https://github.com/git-for-windows/git/security/advisories/GHSA-9w66-8mq8-5vm8 Vendor Advisory 
https://github.com/msys2/MINGW-packages/pull/10461 Issue Tracking  Patch 
https://github.com/msys2/MINGW-packages/pull/10461 Issue Tracking  Patch 
https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html
https://lists.debian.org/debian-lts-announce/2024/06/msg00018.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PI7FZ4NNR5S5J5K6AMVQBH2JFP6NE4L7/ Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PI7FZ4NNR5S5J5K6AMVQBH2JFP6NE4L7/ Mailing List  Third Party Advisory 
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/RKOXOAZ42HLXHXTW6JZI4L5DAIYDTYCU/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YFZWGQKB6MM5MNF2DLFTD7KS2KWPICKL/ Mailing List  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YFZWGQKB6MM5MNF2DLFTD7KS2KWPICKL/ Mailing List  Third Party Advisory 
https://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html Product 
https://pubs.opengroup.org/onlinepubs/9699919799/functions/printf.html Product 
https://security.gentoo.org/glsa/202312-15
https://security.gentoo.org/glsa/202312-15

Weakness Enumeration

CWE-ID CWE Name Source
CWE-134 Use of Externally-Controlled Format String cwe source acceptance level NIST   GitHub, Inc.  
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') GitHub, Inc.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

9 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2023-25815
NVD Published Date:
04/25/2023
NVD Last Modified:
11/21/2024
Source:
GitHub, Inc.