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

Quick assessment

Affected
git git
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Git是一套免费、开源的分布式版本控制系统。 Git存在输入验证错误漏洞，该漏洞源于当属性名称超过规定大小时会造成整数溢出。

CVSS 9.8 · Critical EPSS 56.33% · P99

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2022-23521

Vulnerability Information
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Vulnerability Title
gitattributes parsing integer overflow in git
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
Git 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Git是一套免费、开源的分布式版本控制系统。 Git存在输入验证错误漏洞，该漏洞源于当属性名称超过规定大小时会造成整数溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
git git < 2.30.7 -

II. Public POCs for CVE-2022-23521

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III. Intelligence Information for CVE-2022-23521

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Patches & Fixes for CVE-2022-23521 (1)

Vendor Advisories for CVE-2022-23521 (2)

IV. Related Vulnerabilities

Same product: git
Same vendor: git
Same weakness: CWE-190

V. Comments for CVE-2022-23521

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