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Vulnerability record · CVE-2016-2232 · published 22 February 2016

CVE-2016-2232: Digium asterisk vulnerability

Digium · Asterisk

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 allow remote authenticated users to cause a denial of service (uninitialized pointer dereference and crash) via a zero length error correcting redundancy packet for a UDPTL FAX packet that is lost.

6.5 CVSS 3.0 Medium EPSS 5.1% · top 8.0%
6.5CVSS 3.0 base score, v2 4.0
5.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

Description

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 allow remote authenticated users to cause a denial of service (uninitialized pointer dereference and crash) via a zero length error correcting redundancy packet for a UDPTL FAX packet that is lost.

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

Affected products

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

References

LinkTags
http://downloads.asterisk.org/pub/security/AST-2016-003.html Vendor Advisory
http://www.debian.org/security/2016/dsa-3700
http://www.securitytracker.com/id/1034931
http://downloads.asterisk.org/pub/security/AST-2016-003.html Vendor Advisory
http://www.debian.org/security/2016/dsa-3700
http://www.securitytracker.com/id/1034931

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-2232), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.