trendnet tew-827dru_firmware 在文件访问前对链接解析不恰当（链接跟随）

CVE编号

CVE-2021-20153

利用情况

暂无

补丁情况

N/A

披露时间

2021-12-31

漏洞描述

Trendnet AC2600 TEW-827DRU version 2.08B01 contains a symlink vulnerability in the bittorrent functionality. If enabled, the bittorrent functionality is vulnerable to a symlink attack that could lead to remote code execution on the device. If an end user inserts a flash drive with a malicious symlink on it that the bittorrent client can write downloads to, then a user is able to download arbitrary files to any desired location on the devices filesystem, which could lead to remote code execution. Example directories vulnerable to this include "config", "downloads", and "torrents", though it should be noted that "downloads" is the only vector that allows for arbitrary files to be downloaded to arbitrary locations.

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://www.tenable.com/security/research/tra-2021-54

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
	系统	trendnet	tew-827dru_firmware	2.08b01	-
	运行在以下环境
	硬件	trendnet	tew-827dru	2.0	-

CVSS3评分 6.8

• 攻击路径 物理
• 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 高
• 保密性 高
• 完整性 高

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CWE-ID 漏洞类型 CWE-59 在文件访问前对链接解析不恰当（链接跟随）