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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2016-2316
• http://downloads.asterisk.org/pub/security/AST-2016-002.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177409.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177422.html
• http://www.debian.org/security/2016/dsa-3700
• http://www.securityfocus.com/bid/82651
• http://www.securitytracker.com/id/1034930