Condorlab

Junos – Vulnerability in the SIP ALG packet Junos OS: 12.3X48


Advisory IDRSN-SIP-1643

Vulnerability Information

A vulnerability in the SIP ALG packet processing service of Juniper Networks Junos OS allows an attacker to cause a Denial of Service (DoS) to the device by sending specific types of valid SIP traffic to the device. In this case, the flowd process crashes and generates a core dump while processing SIP ALG traffic. Continued receipt of these valid SIP packets will result in a sustained Denial of Service (DoS) condition. This issue affects: Juniper Networks Junos OS: 12.3X48 versions prior to 12.3X48-D61, 12.3X48-D65 on SRX Series; 15.1X49 versions prior to 15.1X49-D130 on SRX Series; 17.3 versions prior to 17.3R3 on SRX Series; 17.4 versions prior to 17.4R2 on SRX Series.

Technical Information

An attacker can cause a Denial of Service (DoS) to the device by sending specific types of valid SIP traffic to the device. In this case, the flowd process crashes and generates a core dump while processing SIP ALG traffic. This issue affects: Juniper Networks Junos OS: 12.3X48 versions prior to 12.3X48-D61, 12.3X48-D65 on SRX Series; 15.1X49 versions prior to 15.1X49-D130 on SRX Series; 17.3 versions prior to 17.3R3 on SRX Series; 17.4 versions prior to 17.4R2 on SRX Series.

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

https://kb.juniper.net/JSA10953
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-sip-alg.html
https://www.juniper.net/documentation/en_US/junos/topics/topic-map/security-sip-alg.html

Common Vulnerabilities and Exposures (CVE)

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-0055