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CVE-2021-29468— Arbitrary code execution when checking out an attacker-controlled Git branch

CVSS 8.8 · High EPSS 0.55% · P68
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I. Basic Information for CVE-2021-29468

Vulnerability Information
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Vulnerability Title
Arbitrary code execution when checking out an attacker-controlled Git branch
Source: NVD (National Vulnerability Database)
Vulnerability Description
Cygwin Git is a patch set for the git command line tool for the cygwin environment. A specially crafted repository that contains symbolic links as well as files with backslash characters in the file name may cause just-checked out code to be executed while checking out a repository using Git on Cygwin. The problem will be patched in the Cygwin Git v2.31.1-2 release. At time of writing, the vulnerability is present in the upstream Git source code; any Cygwin user who compiles Git for themselves from upstream sources should manually apply a patch to mitigate the vulnerability. As mitigation users should not clone or pull from repositories from untrusted sources. CVE-2019-1354 was an equivalent vulnerability in Git for Visual Studio.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cygwin 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cygwin是一个应用软件。提供实质性POSIX API功能的DLL。 Cygwin Git 存在输入验证错误漏洞，该漏洞源于一个包含符号链接和文件名中带有反斜杠字符的文件的特殊设计的存储库可能会导致刚签出的代码被执行。
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

VendorProductAffected VersionsCPESubscribe
me-andCygwin-Git < 2.31.1-2 -

II. Public POCs for CVE-2021-29468

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III. Intelligence Information for CVE-2021-29468

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Patches & Fixes for CVE-2021-29468 (1)

Vendor Advisories for CVE-2021-29468 (1)

Other References for CVE-2021-29468 (2)

IV. Related Vulnerabilities

Same weakness: CWE-20

V. Comments for CVE-2021-29468

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