Vulnerability Monitor

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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 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.

Published

2021-03-24T20:15:14.977

Last Modified

2024-11-21T05:44:22.010

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.4 (HIGH)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:N/I:N/A:P

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

6.5

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-120
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application cisco aironet_access_point_software - Yes
Hardware cisco 1100_integrated_services_router - No
Hardware cisco aironet_1540 - No
Hardware cisco aironet_1560 - No
Hardware cisco aironet_1800 - No
Hardware cisco aironet_2800 - No
Hardware cisco aironet_3800 - No
Hardware cisco aironet_4800 - No
Hardware cisco catalyst_9100 - No
Hardware cisco catalyst_iw6300 - No
Hardware cisco esw6300 - No
Operating System cisco catalyst_9800_firmware < 17.3.3 Yes
Hardware cisco catalyst_9800 - No
References