Headline

CVE-2022-23521: GitHub: CVE-2022-23521 gitattributes parsing integer overflow

Why is this GitHub CVE included in the Security Update Guide?

The vulnerability assigned to this CVE is in Git for Windows software which is consumed by Microsoft Visual Studio. It is being documented in the Security Update Guide to announce that the latest builds of Visual Studio are no longer vulnerable. Please see Security Update Guide Supports CVEs Assigned by Industry Partners for more information.

1 year ago

Microsoft Security Response Center

Open in Source

#vulnerability #web #windows #microsoft #git #rce #Visual Studio #Security Vulnerability

CVE-ID

Learn more at National Vulnerability Database (NVD)

• CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information

Description

Git is distributed revision control system. gitattributes are a mechanism to allow defining attributes for paths. These attributes can be defined by adding a `.gitattributes` file to the repository, which contains a set of file patterns and the attributes that should be set for paths matching this pattern. When parsing gitattributes, multiple integer overflows can occur when there is a huge number of path patterns, a huge number of attributes for a single pattern, or when the declared attribute names are huge. These overflows can be triggered via a crafted `.gitattributes` file that may be part of the commit history. Git silently splits lines longer than 2KB when parsing gitattributes from a file, but not when parsing them from the index. Consequentially, the failure mode depends on whether the file exists in the working tree, the index or both. This integer overflow can result in arbitrary heap reads and writes, which may result in remote 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. There are no known workarounds for this issue.

References

Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.

MISC:https://github.com/git/git/commit/508386c6c5857b4faa2c3e491f422c98cc69ae76
URL:https://github.com/git/git/commit/508386c6c5857b4faa2c3e491f422c98cc69ae76
MISC:https://github.com/git/git/security/advisories/GHSA-c738-c5qq-xg89
URL:https://github.com/git/git/security/advisories/GHSA-c738-c5qq-xg89

Assigning CNA

GitHub (maintainer security advisories)

Date Record Created

20220119

Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.

Phase (Legacy)

Assigned (20220119)

Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)

N/A

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