CVE-2018-12227

Name: CVE-2018-12227
Creator: NVD / NIST
Published: 2018-06-12T04:29:00.22+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.53%

Last modified Jun 17, 2026

CVE-2018-12227 is a vulnerability of currently unknown severity. An issue was discovered in Asterisk Open Source 13.x before 13.21.1, 14.x before 14.7.7, and 15.x before 15.4.1 and Certified Asterisk 13.18-cert before 13.18-cert4 and 13.21-cert before 13.21-cert2. When endpoint specific ACL rules block a SIP request, they respond with a 403 forbidden. EPSS estimates a 3.53% chance of exploitation in the next 30 days.

Description

An issue was discovered in Asterisk Open Source 13.x before 13.21.1, 14.x before 14.7.7, and 15.x before 15.4.1 and Certified Asterisk 13.18-cert before 13.18-cert4 and 13.21-cert before 13.21-cert2. When endpoint specific ACL rules block a SIP request, they respond with a 403 forbidden. However, if an endpoint is not identified, then a 401 unauthorized response is sent. This vulnerability just discloses which requests hit a defined endpoint. The ACL rules cannot be bypassed to gain access to the disclosed endpoints.

Metrics

EPSS Probability

3.53%

87.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-200

Affected Software

Vendor	Product	Versions	Update
Digium	Asterisk	>= 13.0.0, < 13.21.1	—
Digium	Asterisk	> 14.0.0, < 14.7.7	—
Digium	Asterisk	>= 15.0.0, < 15.4.1	—
Digium	Certified Asterisk	13.18	Cert1
Digium	Certified Asterisk	13.21	Cert1
Debian	Debian Linux	9.0	—

References

http://downloads.asterisk.org/pub/security/AST-2018-008.htmlVendor Advisory
http://www.securityfocus.com/bid/104455Third Party Advisory, VDB Entry
https://issues.asterisk.org/jira/browse/ASTERISK-27818Patch, Vendor Advisory
https://security.gentoo.org/glsa/201811-11Third Party Advisory
https://www.debian.org/security/2018/dsa-4320Third Party Advisory
http://downloads.asterisk.org/pub/security/AST-2018-008.htmlVendor Advisory
http://www.securityfocus.com/bid/104455Third Party Advisory, VDB Entry
https://issues.asterisk.org/jira/browse/ASTERISK-27818Patch, Vendor Advisory
https://security.gentoo.org/glsa/201811-11Third Party Advisory
https://www.debian.org/security/2018/dsa-4320Third Party Advisory

Timeline

Published: Jun 12, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-12227?

How severe is CVE-2018-12227?

Severity scoring for CVE-2018-12227 is pending analysis. The EPSS model estimates a 3.53% probability of exploitation in the next 30 days.

How do I fix CVE-2018-12227?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-12227?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST