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CVE-2021-1439

Cisco Aironet Access Points FlexConnect Multicast DNS Denial of Service Vulnerability

Published: Mar 24, 2021Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-120
NVD MITRE
7.4CVSSHIGH
EPSS Score
0.4%
Top 69.7%
CISA KEV
Not in KEV
Exploits
0 Known
Remediation
Patch Available

Description

A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to insufficient input validation of incoming mDNS traffic. An attacker could exploit this vulnerability by sending a crafted mDNS packet to an affected device through a wireless network that is configured in FlexConnect local switching mode or through a wired network on a configured mDNS VLAN. A successful exploit could allow the attacker to cause the access point (AP) to reboot, resulting in a DoS condition.

CVSS Vector Breakdown

AV:AAC:LPR:NUI:NS:CC:NI:NA:H
Exploitability
AV:AAttack Vector
Adjacent
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-120

Affected Products

Cisco Aironet Access Point Software (IOS XE Controller)CiscoNetworking Infrastructure
Cisco Aironet 1540Cisco Systems Inc.Networking Infrastructure
Cisco Aironet 1560Cisco Systems Inc.Networking Infrastructure
Cisco Aironet 1800Cisco Systems Inc.Networking Infrastructure
Cisco Aironet 2800Cisco Systems Inc.Networking Infrastructure
ciscocommercialUSNetworking Infrastructureaka cisco systems, cisco systems inc.
cisco systems inc.commercialUSNetworking Infrastructureaka cisco systems, cisco
and 6 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

0 exploit sources identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aironet-mdns-dos-E6KwYuMx
tools.cisco.com

Timeline

Published
Mar 24, 2021
Last Updated
Nov 21, 2024

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