linuxfoundation the_update_framework 对路径名的限制不恰当（路径遍历）

CVE编号

CVE-2021-41131

利用情况

暂无

补丁情况

N/A

披露时间

2021-10-20

漏洞描述

python-tuf is a Python reference implementation of The Update Framework (TUF). In both clients (`tuf/client` and `tuf/ngclient`), there is a path traversal vulnerability that in the worst case can overwrite files ending in `.json` anywhere on the client system on a call to `get_one_valid_targetinfo()`. It occurs because the rolename is used to form the filename, and may contain path traversal characters (ie `../../name.json`). The impact is mitigated by a few facts: It only affects implementations that allow arbitrary rolename selection for delegated targets metadata, The attack requires the ability to A) insert new metadata for the path-traversing role and B) get the role delegated by an existing targets metadata, The written file content is heavily restricted since it needs to be a valid, signed targets file. The file extension is always .json. A fix is available in version 0.19 or newer. There are no workarounds that do not require code changes. Clients can restrict the allowed character set for rolenames, or they can store metadata in files named in a way that is not vulnerable: neither of these approaches is possible without modifying python-tuf.

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/theupdateframework/python-tuf/commit/4ad7ae48fda594b640139...
https://github.com/theupdateframework/python-tuf/issues/1527
https://github.com/theupdateframework/python-tuf/security/advisories/GHSA-wjw...

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	linuxfoundation	the_update_framework	*		Up to (including) 0.18.1

CVSS3评分 7.5

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

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