Cisco SPA100 Series Analog Telephone Adapters CVE-2019-15258 Denial of Service Vulnerability

Description

Cisco SPA100 Series Analog Telephone Adapters are prone to a remote denial-of-service vulnerability. An attacker can exploit this issue to cause a denial-of-service condition. This issue is being tracked by Cisco Bug ID CSCvq50529.

Technologies Affected

• Cisco Small Business Voice Gateways and ATAs 1.4.1SR3

Recommendations

Block external access at the network boundary, unless external parties require service.
If global access isn’t needed, filter access to the affected computer at the network boundary. Restricting access to only trusted computers and networks might greatly reduce the likelihood of successful exploits.

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.