What is CVE-2018-12228?

CVE-2018-12228 is a medium-severity vulnerability in Sangoma Asterisk, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.5/10. Published 2018-06-12.

How severe is CVE-2018-12228?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Sangoma Asterisk

CVE-2018-12228

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.

Published 2018-06-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.067 (93.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 94th percentile — 93.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.067 · newest: 0.067 · change: 0.000

Affected products

Sangoma Asterisk

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

www.securityfocus.com/bid/104457 (VDB Entry, Third Party Advisory, vdb-entry)
issues.asterisk.org/jira/browse/ASTERISK-27807 (Exploit, Vendor Advisory)
downloads.asterisk.org/pub/security/AST-2018-007.html (Vendor Advisory)

Frequently asked questions

What is CVE-2018-12228?: CVE-2018-12228 is a medium-severity vulnerability in Sangoma Asterisk, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.5/10. Published 2018-06-12.
How severe is CVE-2018-12228?: Medium severity. CVSS v3 base score is 6.5 out of 10.