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Vulnerability record · CVE-2018-12228 · published 12 June 2018

CVE-2018-12228: Sangoma asterisk vulnerability

Sangoma · Asterisk

An issue was discovered in Asterisk Open Source 15.x before 15.4.1. When connected to Asterisk via TCP/TLS, if the client abruptly disconnects, or sends a specially crafted message, then Asterisk gets caught in an infinite loop while trying to read the data stream. This renders the system unusable.

6.5 CVSS 3.0 Medium EPSS 6.7% · top 6.3% CWE-835 · CWE-835
6.5CVSS 3.0 base score, v2 6.8
6.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Asterisk Open Source 15.x before 15.4.1. When connected to Asterisk via TCP/TLS, if the client abruptly disconnects, or sends a specially crafted message, then Asterisk gets caught in an infinite loop while trying to read the data stream. This renders the system unusable.

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

Affected products

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

References

LinkTags
http://downloads.asterisk.org/pub/security/AST-2018-007.html Vendor Advisory
http://www.securityfocus.com/bid/104457 Third Party AdvisoryVDB Entry
https://issues.asterisk.org/jira/browse/ASTERISK-27807 ExploitVendor Advisory
http://downloads.asterisk.org/pub/security/AST-2018-007.html Vendor Advisory
http://www.securityfocus.com/bid/104457 Third Party AdvisoryVDB Entry
https://issues.asterisk.org/jira/browse/ASTERISK-27807 ExploitVendor Advisory

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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-2018-12228), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.