sharpziplib_project sharpziplib 对路径名的限制不恰当（路径遍历）

CVE编号

CVE-2021-32842

利用情况

暂无

补丁情况

N/A

披露时间

2022-01-27

漏洞描述

SharpZipLib (or #ziplib) is a Zip, GZip, Tar and BZip2 library. Starting version 1.0.0 and prior to version 1.3.3, a check was added if the destination file is under a destination directory. However, it is not enforced that `_baseDirectory` ends with slash. If the _baseDirectory is not slash terminated like `/home/user/dir` it is possible to create a file with a name thats begins as the destination directory one level up from the directory, i.e. `/home/user/dir.sh`. Because of the file name and destination directory constraints, the arbitrary file creation impact is limited and depends on the use case. Version 1.3.3 fixed this vulnerability.

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://github.com/icsharpcode/SharpZipLib/releases/tag/v1.3.3
https://securitylab.github.com/advisories/GHSL-2021-125-sharpziplib/

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	sharpziplib_project	sharpziplib	*	From (including) 1.0.0	Up to (excluding) 1.3.3

CVSS3评分 5.3

• 攻击路径 网络
• 攻击复杂度 低
• 权限要求 无
• 影响范围 未更改
• 用户交互 无
• 可用性 无
• 保密性 无
• 完整性 低

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N CWE-ID 漏洞类型 CWE-22 对路径名的限制不恰当（路径遍历）