What’s Vulnerable › Vulnerabilities

CVE-2016-2316

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-02-22 · updated 2026-06-17
• Weakness: CWE-191

Description

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.

Affected products

• Digium Asterisk: 1.8.0, 1.8.0-beta1, 1.8.0-beta2, 1.8.0-beta3, 1.8.0-beta4, 1.8.0-beta5 (+243)
• Digium Certified Asterisk: 1.8.28, 11.6-cert1, 11.6-cert1_rc2, 11.6-cert10, 11.6-cert11, 11.6-cert2 (+16)
• Fedoraproject Fedora: 22, 23

References

• 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
• 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

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