CVE-2022-23521— Git 输入验证错误漏洞
一分钟漏洞结论
影响对象
git git
利用判断
利用概率较高，应尽快评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
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。
可能的 ATT&CK 技术 1 AI
T1190 · Exploit Public-Facing Application
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一、 漏洞 CVE-2022-23521 基础信息
漏洞信息
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Vulnerability Title
gitattributes parsing integer overflow in git
来源: 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.
来源: 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
来源: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
来源: CVE Program / CVE List V5
Vulnerability Title
Git 输入验证错误漏洞
来源: 中国国家信息安全漏洞库 CNNVD
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。
来源: 中国国家信息安全漏洞库 CNNVD
CVSS Information
N/A
来源: 中国国家信息安全漏洞库 CNNVD
Vulnerability Type
N/A
来源: 中国国家信息安全漏洞库 CNNVD
受影响产品
二、漏洞 CVE-2022-23521 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2022-23521 补丁与修复 (1)
CVE-2022-23521 厂商安全公告 (2)
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https://github.com/git/git/security/advisories/GHSA-c738-c5qq-xg89 x_refsource_CONFIRM
IV. Related Vulnerabilities
V. Comments for CVE-2022-23521
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