CVE-2016-7551

Severity: high (CVSS 7.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 5.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2017-04-17 · updated 2026-06-17
Weakness: CWE-399

Description

chain_sip in Asterisk Open Source 11.x before 11.23.1 and 13.x 13.11.1 and Certified Asterisk 11.6 before 11.6-cert15 and 13.8 before 13.8-cert3 allows remote attackers to cause a denial of service (port exhaustion).

Affected products

Debian Linux: 8.0
Digium Asterisk: 11.0.0, 11.0.0-beta1, 11.0.0-beta2, 11.0.0-rc1, 11.0.0-rc2, 11.0.1 (+75)
Digium Certified Asterisk: 11.6-cert1, 11.6-cert1_rc1, 11.6-cert1_rc2, 11.6-cert10, 11.6-cert11, 11.6-cert12 (+21)

References

http://downloads.asterisk.org/pub/security/AST-2016-007.html
http://www.debian.org/security/2016/dsa-3700
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=838832
https://bugzilla.redhat.com/show_bug.cgi?id=1374733
https://issues.asterisk.org/jira/browse/ASTERISK-26272
http://downloads.asterisk.org/pub/security/AST-2016-007.html
http://www.debian.org/security/2016/dsa-3700
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=838832
https://bugzilla.redhat.com/show_bug.cgi?id=1374733
https://issues.asterisk.org/jira/browse/ASTERISK-26272

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