CVE-2024-20303
high-risk
Published 2024-03-27
A vulnerability in the multicast DNS (mDNS) gateway feature of Cisco IOS XE Software for Wireless LAN Controllers (WLCs) could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition. This vulnerability is due to improper management of mDNS client entries. An attacker could exploit this vulnerability by connecting to the wireless network and sending a continuous stream of specific mDNS packets. A successful exploit could allow the attacker to cause the wireless controller to have high CPU utilization, which could lead to access points (APs) losing their connection to the controller and result in a DoS condition.
Do I need to act?
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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
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Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.4/10
High
ADJACENT_NETWORK
/ LOW complexity
Affected Products (20)
Affected Vendors
References (2)
51
/ 100
high-risk
Severity
23/34 · High
Exploitability
0/34 · Minimal
Exposure
28/34 · Critical