CVE-2021-20133 Information

Description

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).

CVSS Vector

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

Reference

https://www.tenable.com/security/research/tra-2021-44

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.1