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.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.4, indicating it requires adjacent network access with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 13 products from cisco, from cisco, from cisco and 10 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2021-03-24T20:15:14.977
2024-11-21T05:44:22.010
Modified
CVSSv3.1: 7.4 (HIGH)
AV:A/AC:L/Au:N/C:N/I:N/A:P
6.5
2.9
| 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 |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.