CVE-2018-12228

Severity: medium (CVSS 6.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 6.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-06-12 · updated 2026-06-17
Weakness: CWE-835

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.

Affected products

asterisk: from 15.0 before 15.4.1 — fixed in 15.4.1

How to fix

Upgrade to a fixed version: asterisk 15.4.1. Check the vendor advisory for mitigations.

References

http://downloads.asterisk.org/pub/security/AST-2018-007.html
http://www.securityfocus.com/bid/104457
https://issues.asterisk.org/jira/browse/ASTERISK-27807
http://downloads.asterisk.org/pub/security/AST-2018-007.html
http://www.securityfocus.com/bid/104457
https://issues.asterisk.org/jira/browse/ASTERISK-27807

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