PT-2021-2446 · Cisco · Cisco Aironet Series Access Points

Published 2021-03-24 · Updated 2023-05-22 · CVE-2021-1439

Positive Technologies (AI Summary)

CVSS v3.1

7.4

High

Base vector

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

Name of the Vulnerable Software and Affected Versions: Cisco Aironet Series Access Points Software (affected versions not specified)

Description: A vulnerability in the multicast DNS (mDNS) gateway feature could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. This issue is due to insufficient input validation of incoming mDNS traffic. An attacker could exploit this by sending a crafted mDNS packet to an affected device through a wireless network 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.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2021-01811

CVE-2021-1439

Affected Products

Cisco Aironet Series Access Points

References · 5

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-aironet-mdns-dos-E6KwYuMx · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-1439 · Security Note
• https://bdu.fstec.ru/vul/2021-01811 · Security Note
• https://osv.dev/vulnerability/CVE-2021-1439 · Vendor Advisory
• https://t.me/cvenotify/12395 · Telegram Post