How severe is CVE-2018-12228?

CVE-2018-12228 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-12228 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12228?

CVE-2018-12228 affects Sangoma Asterisk. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12228?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2018-12228 published?

CVE-2018-12228 was published on 2018-06-12 and last updated on 2026-06-17.

CVE-2018-12228

CVE-2018-12228 is a medium-severity vulnerability in Sangoma Asterisk with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-835.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.8
EPSS exploit prediction: 7% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-835
Affected product: Sangoma Asterisk
Published: 2018-06-12
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-12228?: CVE-2018-12228 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-12228 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 7% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12228?: CVE-2018-12228 affects Sangoma Asterisk. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12228?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-12228 published?: CVE-2018-12228 was published on 2018-06-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*

More vulnerabilities in Sangoma Asterisk

CVE-2024-57520 — Critical (CVSS 9.8): Insecure Permissions vulnerability in asterisk v22 allows a remote attacker to execute arbitrary code via the…
CVE-2022-21723 — Critical (CVSS 9.1): PJSIP is a free and open source multimedia communication library written in C language implementing standard based…
CVE-2012-2186 — Critical (CVSS 9.0): Incomplete blacklist vulnerability in main/manager.c in Asterisk Open Source 1.8.x before 1.8.15.1 and 10.x before…
CVE-2022-23608 — High (CVSS 8.1): PJSIP is a free and open source multimedia communication library written in C language implementing standard based…
CVE-2025-1131 — High (CVSS 7.8): A local privilege escalation vulnerability exists in the safe_asterisk script included with the Asterisk toolkit…
CVE-2025-47780 — High (CVSS 7.8): Asterisk is an open-source private branch exchange (PBX). Prior to versions 18.26.2, 20.14.1, 21.9.1, and 22.4.1 of…

All CVEs affecting Sangoma Asterisk →

Other CWE-835 (Loop with Unreachable Exit Condition (Infinite Loop)) vulnerabilities

CVE-2026-24816 — Critical (CVSS 10.0): Loop with Unreachable Exit Condition ('Infinite Loop') vulnerability in datavane tis…
CVE-2018-20784 — Critical (CVSS 9.8): In the Linux kernel before 4.20.2, kernel/sched/fair.c mishandles leaf cfs_rq's, which allows attackers to cause a…
CVE-2017-12997 — Critical (CVSS 9.8): The LLDP parser in tcpdump before 4.9.2 could enter an infinite loop due to a bug in…
CVE-2017-12995 — Critical (CVSS 9.8): The DNS parser in tcpdump before 4.9.2 could enter an infinite loop due to a bug in print-domain.c:ns_print().
CVE-2017-12990 — Critical (CVSS 9.8): The ISAKMP parser in tcpdump before 4.9.2 could enter an infinite loop due to bugs in print-isakmp.c, several functions.
CVE-2026-31448 — Critical (CVSS 9.4): In the Linux kernel, the following vulnerability has been resolved: ext4: avoid infinite loops caused by residual…

Browse all CWE-835 (Loop with Unreachable Exit Condition (Infinite Loop)) vulnerabilities →