CVE-2021-20133

Severity CVSS v4.0:

Pending analysis

Type:

CWE-22 Path Traversal

Publication date:

30/12/2021

Last modified:

12/01/2022

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).

Impact

Vector 3.x

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x

6.10

Severity 3.x

MEDIUM

Vector 2.0

AV:A/AC:L/Au:S/C:C/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: AV:A/AC:L/Au:S/C:C/I:N/A:C

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Complete
Integrity (I): None
Availability (A): Complete

Base Score 2.0

7.10

Severity 2.0

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:dlink:dir-2640-us_firmware::::::::		1.11b02 (including)
cpe:2.3:h:dlink:dir-2640-us:-:::::::*

To consult the complete list of CPE names with products and versions, see this page

References to Advisories, Solutions, and Tools

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