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CVE-2021-20133

Published: Dec 30, 2021Updated: Nov 21, 2024 Sources: CVE List NVDCWE-22
6.1CVSSMEDIUM

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 Breakdown

AV:AAC:LPR:HUI:NS:UC:HI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:NIntegrity
None
A:HAvailability
High

Weaknesses

Affected Products

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

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MITRE ATT&CK

2 techniques
Collection
Discovery
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References

Timeline

Published
Dec 30, 2021
Last Updated
Nov 21, 2024

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