cygwin git 输入验证不恰当

CVE编号

CVE-2021-29468

利用情况

暂无

补丁情况

官方补丁

披露时间

2021-04-30

漏洞描述

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.

解决建议

建议您更新当前系统或软件至最新版，完成漏洞的修复。

参考链接
https://cygwin.com/pipermail/cygwin-announce/2021-April/010018.html
https://github.com/me-and/Cygwin-Git/blob/main/check-backslash-safety.patch
https://github.com/me-and/Cygwin-Git/security/advisories/GHSA-rmp3-wq55-f557
https://lore.kernel.org/git/CA+kUOa=juEdBMVr_gyTKjz7PkPt2DZHkXQyzcQmAWCsEHC_s...

受影响软件情况

#	类型	厂商	产品	版本	影响面
1
	运行在以下环境
	应用	cygwin	git	*		Up to (including) 2.31.1-1
	运行在以下环境
	系统	alpine_3.10	git	*		Up to (excluding) 0
	运行在以下环境
	系统	alpine_3.11	git	*		Up to (excluding) 0
	运行在以下环境
	系统	alpine_3.12	git	*		Up to (excluding) 0
	运行在以下环境
	系统	alpine_3.13	git	*		Up to (excluding) 0
	运行在以下环境
	系统	alpine_3.14	git	*		Up to (excluding) 0
	运行在以下环境
	系统	alpine_3.15	git	*		Up to (excluding) 0
	运行在以下环境
	系统	alpine_edge	git	*		Up to (excluding) 0
查看完整数据

阿里云评分 3.5

• 攻击路径 远程
• 攻击复杂度 复杂
• 权限要求 无需权限
• 影响范围 有限影响
• EXP成熟度 N/A
• 补丁情况 官方补丁
• 数据保密性 N/A
• 数据完整性 传输被破坏
• 服务器危害 DoS
• 全网数量 N/A

CWE-ID 漏洞类型 CWE-20 输入验证不恰当