chan_sip in Asterisk Open Source 1.8.x, 11.x before 11.21.1, 12.x, and 13.x before 13.7.1 and Certified Asterisk 1.8.28, 11.6 before 11.6-cert12, and 13.1 before 13.1-cert3, when the timert1 sip.conf configuration is set to a value greater than 1245, allows remote attackers to cause a denial of service (file descriptor consumption) via vectors related to large retransmit timeout values.

Multiple vulnerabilities have been discovered in Asterisk, an open source PBX and telephony toolkit, which may result in denial of service or incorrect certificate validation.

Update to upstream 13.7.1 release for security fixes

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The Asterisk project reports :

AST-2016-001 - BEAST vulnerability in HTTP server

AST-2016-002 - File descriptor exhaustion in chan_sip

AST-2016-003 - Remote crash vulnerability when receiving UDPTL FAX data

ID	Name	Product	Family	Severity
94259	Debian DSA-3700-1 : asterisk - security update	Nessus	Debian Local Security Checks	high
89519	Fedora 22 : asterisk-13.7.1-1.fc22 (2016-3cc13611f4)	Nessus	Fedora Local Security Checks	medium
89481	Fedora 23 : asterisk-13.7.1-1.fc23 (2016-153eed2bb8)	Nessus	Fedora Local Security Checks	medium
88584	FreeBSD : asterisk -- Multiple vulnerabilities (559f3d1b-cb1d-11e5-80a4-001999f8d30b) (BEAST)	Nessus	FreeBSD Local Security Checks	medium

Detections

Analytics

CVE-2016-2316

medium

Tenable Plugins

high

medium

medium

medium