critical
9.8
CWE
190
Advisory Published
CVE Published
Updated

CVE-2022-23521: gitattributes parsing integer overflow in git

First published: Tue Jan 17 2023(Updated: )

A flaw was found in Git, a distributed revision control system. When parsing gitattributes, a mechanism to allow defining attributes for paths, multiple integer overflows can occur when there is a huge number of path patterns, attributes for a single pattern, or declared attribute names. 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 allow remote code execution.

Credit: security-advisories@github.com

Affected SoftwareAffected VersionHow to fix
redhat/git<0:1.8.3.1-24.el7_9
0:1.8.3.1-24.el7_9
redhat/git<0:2.31.1-3.el8_7
0:2.31.1-3.el8_7
redhat/git<0:2.18.4-2.el8_1
0:2.18.4-2.el8_1
redhat/git<0:2.18.4-3.el8_2
0:2.18.4-3.el8_2
redhat/git<0:2.27.0-3.el8_4
0:2.27.0-3.el8_4
redhat/git<0:2.31.1-3.el8_6
0:2.31.1-3.el8_6
redhat/git<0:2.31.1-3.el9_1
0:2.31.1-3.el9_1
redhat/git<0:2.31.1-3.el9_0
0:2.31.1-3.el9_0
redhat/rh-git227-git<0:2.27.0-4.el7
0:2.27.0-4.el7
Git Git-shell<=2.30.6
Git Git-shell>=2.31.0<=2.31.5
Git Git-shell>=2.32.0<=2.32.4
Git Git-shell>=2.33.0<=2.33.5
Git Git-shell>=2.34.0<=2.34.5
Git Git-shell>=2.35.0<=2.35.5
Git Git-shell>=2.36.0<=2.36.3
Git Git-shell>=2.37.0<=2.37.4
Git Git-shell>=2.38.0<=2.38.2
Git Git-shell=2.39.0

Remedy

https://github.com/git/git/commit/508386c6c5857b4faa2c3e491f422c98cc69ae76

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is Git?

    Git is a distributed revision control system.

  • What are gitattributes?

    gitattributes are a mechanism to allow defining attributes for paths in Git repositories.

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2022-23521.

  • What is the severity of CVE-2022-23521?

    The severity of CVE-2022-23521 is critical with a CVSS score of 9.8.

  • How can I fix the vulnerability CVE-2022-23521?

    To fix the vulnerability, update Git to version 2.39.0 or apply the appropriate patches provided by your vendor.

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