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Vulnerability record · CVE-2016-7551 · published 17 April 2017

CVE-2016-7551: Digium asterisk vulnerability

Digium · Asterisk

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).

7.5 CVSS 3.0 High EPSS 5.5% · top 7.5% CWE-399 · CWE-399
7.5CVSS 3.0 base score, v2 5.0
5.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

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).

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2016-7551), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.