Condorlab

Cisco – Vulnerability in Cisco Small Business SPA514G IP Phones


Advisory IDRSN-SIP-1604

Vulnerability Information

A vulnerability in the implementation of Session Initiation Protocol (SIP) processing in Cisco Small Business SPA514G IP Phones could allow an unauthenticated, remote attacker to cause an affected device to become unresponsive, resulting in a denial of service (DoS) condition. The vulnerability is due to improper processing of SIP request messages by an affected device. An attacker could exploit this vulnerability by sending crafted SIP messages to an affected device. A successful exploit could allow the attacker to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually. Cisco has not released software updates that address this vulnerability. This vulnerability affects Cisco Small Business SPA514G IP Phones that are running firmware release 7.6.2SR2 or earlier.


Technical Information

An attacker could send crafted SIP messages to an affected phone to cause the affected device to become unresponsive, resulting in a DoS condition that persists until the device is restarted manually.


Solutions

The UCTM solution from RedShift Networks provides the industry’s first complete security solution developed to secure VOIP networks, endpoints and applications. His research team Condor-Labs.com is constantly looking for new attack patterns, advanced penetration testing methods, vulnerability identification and deployment of new signatures for constantly subscribed clients. For more information visit www.redshiftnetworks.com


External Resources

Cisco Security Advisory

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180516-ip-phone-dos

Common Vulnerabilities and Exposures (CVE)

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-0325
http://www.securityfocus.com/bid/104202