dlink dir-2640-us_firmware 对路径名的限制不恰当（路径遍历）

CVE编号

CVE-2021-20134

利用情况

暂无

补丁情况

N/A

披露时间

2021-12-31

漏洞描述

Quagga Services on D-Link DIR-2640 less than or equal to version 1.11B02 are affected by an absolute path traversal vulnerability that allows a remote, authenticated attacker to set an arbitrary file on the router's filesystem as the log file used by either Quagga service (zebra or ripd). Subsequent log messages will be appended to the file, prefixed by a timestamp and some logging metadata. Remote code execution can be achieved by using this vulnerability to append to a shell script on the router's filesystem, and then awaiting or triggering the execution of that script. A remote, unauthenticated root shell can easily be obtained on the device in this fashion.

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-2021-44

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	dlink	dir-2640-us_firmware	*		Up to (including) 1.11b02
	运行在以下环境
	硬件	dlink	dir-2640-us	-	-

CVSS3评分 8.4

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

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