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

CVE编号

CVE-2021-20133

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 the "message of the day" banner to any file on the system, allowing them to read all or some of the contents of those files. Such sensitive information as hashed credentials, hardcoded plaintext passwords for other services, configuration files, and private keys can be disclosed in this fashion. Improper handling of filenames that identify virtual resources, such as "/dev/urandom" allows an attacker to effect a denial of service attack against the command line interfaces of the Quagga services (zebra and ripd).

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 6.1

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

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