CVE-2021-1439

published 2021-03-24

CVE-2021-1439: A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco Aironet Series Access Points Software could allow an unauthenticated, adjacent attacker to…

Priority P3 35 high 7.4 CVSS 3.1

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

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.

Affected

3 ranges

Vendor	Product	Version range	Fixed in
cisco	aironet_access_points_flexconnect_multicast	—	—
cisco	catalyst_9800_firmware	>= 17.1 < 17.3.3	17.3.3
cisco	cisco_aironet_access_point_software	—	—

CVSS provenance

nvd v3.1 7.4 HIGH CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

nvd v2.0 3.3 LOW AV:A/AC:L/Au:N/C:N/I:N/A:P

vendor_cisco 7.4 HIGH

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CWE-120