Cisco Wireless LAN Controller CVE-2019-15262 Denial of Service Vulnerability

Description

Cisco Wireless LAN Controller is prone to a remote denial-of-service vulnerability. An attacker can exploit this issue to exhaust resources, denying service to legitimate users. This issue is being tracked by Cisco Bug ID CSCvp34148.

Technologies Affected

• Cisco Wireless Lan Controller Software 3.2
• Cisco Wireless Lan Controller Software 3.2.116.21
• Cisco Wireless Lan Controller Software 4.0
• Cisco Wireless Lan Controller Software 4.0.108
• Cisco Wireless Lan Controller Software 4.0.155.0
• Cisco Wireless Lan Controller Software 4.0.155.5
• Cisco Wireless Lan Controller Software 4.0.179.11
• Cisco Wireless Lan Controller Software 4.0.179.8
• Cisco Wireless Lan Controller Software 4.0.196
• Cisco Wireless Lan Controller Software 4.0.206.0
• Cisco Wireless Lan Controller Software 4.0.217.0
• Cisco Wireless Lan Controller Software 4.0.219.0
• Cisco Wireless Lan Controller Software 4.1
• Cisco Wireless Lan Controller Software 4.1.171.0
• Cisco Wireless Lan Controller Software 4.1.181.0
• Cisco Wireless Lan Controller Software 4.1.185.0
• Cisco Wireless Lan Controller Software 4.1M
• Cisco Wireless Lan Controller Software 4.2
• Cisco Wireless Lan Controller Software 4.2.112.0
• Cisco Wireless Lan Controller Software 4.2.117.0
• Cisco Wireless Lan Controller Software 4.2.130.0
• Cisco Wireless Lan Controller Software 4.2.173.0
• Cisco Wireless Lan Controller Software 4.2.174.0
• Cisco Wireless Lan Controller Software 4.2.176.0
• Cisco Wireless Lan Controller Software 4.2.182.0
• Cisco Wireless Lan Controller Software 4.2.61.0
• Cisco Wireless Lan Controller Software 4.2.99.0
• Cisco Wireless Lan Controller Software 4.2M
• Cisco Wireless Lan Controller Software 5.0
• Cisco Wireless Lan Controller Software 5.0.148.0
• Cisco Wireless Lan Controller Software 5.0.148.2
• Cisco Wireless Lan Controller Software 5.1
• Cisco Wireless Lan Controller Software 5.1.151.0
• Cisco Wireless Lan Controller Software 5.1.152.0
• Cisco Wireless Lan Controller Software 5.1.160.0
• Cisco Wireless Lan Controller Software 5.2
• Cisco Wireless Lan Controller Software 5.2.157.0
• Cisco Wireless Lan Controller Software 5.2.169.0
• Cisco Wireless Lan Controller Software 6.0
• Cisco Wireless Lan Controller Software 6.0.182.0
• Cisco Wireless Lan Controller Software 6.0.188.0
• Cisco Wireless Lan Controller Software 6.0.196.0
• Cisco Wireless Lan Controller Software 6.0.199.0
• Cisco Wireless Lan Controller Software 6.0.199.4
• Cisco Wireless Lan Controller Software 7.0
• Cisco Wireless Lan Controller Software 7.0.220.0
• Cisco Wireless Lan Controller Software 7.0.235.0
• Cisco Wireless Lan Controller Software 7.0.98.0
• Cisco Wireless Lan Controller Software 7.1.91.0
• Cisco Wireless Lan Controller Software 7.2.103.0
• Cisco Wireless Lan Controller Software 7.2.110.0
• Cisco Wireless Lan Controller Software 7.3
• Cisco Wireless Lan Controller Software 7.3.101.0
• Cisco Wireless Lan Controller Software 7.4
• Cisco Wireless Lan Controller Software 7.4.1.54
• Cisco Wireless Lan Controller Software 7.5
• Cisco Wireless Lan Controller Software 7.6
• Cisco Wireless Lan Controller Software 8.0
• Cisco Wireless Lan Controller Software 8.0(120)
• Cisco Wireless Lan Controller Software 8.0.132.0
• Cisco Wireless Lan Controller Software 8.0.140.0
• Cisco Wireless Lan Controller Software 8.1
• Cisco Wireless Lan Controller Software 8.2
• Cisco Wireless Lan Controller Software 8.2.130.0
• Cisco Wireless Lan Controller Software 8.2.141.0
• Cisco Wireless Lan Controller Software 8.2.170.0
• Cisco Wireless Lan Controller Software 8.3
• Cisco Wireless Lan Controller Software 8.3.102.0
• Cisco Wireless Lan Controller Software 8.3.111.0
• Cisco Wireless Lan Controller Software 8.3.112.0
• Cisco Wireless Lan Controller Software 8.3.140
• Cisco Wireless Lan Controller Software 8.3.143
• Cisco Wireless Lan Controller Software 8.3.150.0
• Cisco Wireless Lan Controller Software 8.4
• Cisco Wireless Lan Controller Software 8.5
• Cisco Wireless Lan Controller Software 8.5.103.0
• Cisco Wireless Lan Controller Software 8.5.105.0
• Cisco Wireless Lan Controller Software 8.5.110
• Cisco Wireless Lan Controller Software 8.5.120.0
• Cisco Wireless Lan Controller Software 8.5.131.0
• Cisco Wireless Lan Controller Software 8.5.135.0
• Cisco Wireless Lan Controller Software 8.5.140.0

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, block access at the network perimeter to computers hosting the vulnerable device.

Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Deploy NIDS to monitor network traffic for signs of anomalous or suspicious activity such as unexplained incoming and outgoing traffic. This may indicate exploit attempts or activity that results from successful exploits.

Updates are available. Please see the references or vendor advisory for more information.