Vulnerability Monitor

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CVE-2018-12227

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, for affected systems. Impacting 3 products from digium, from digium, from debian organizations running these solutions should prioritize assessment and patching.

Historical Context

First disclosed in 2018, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.

Published

2018-06-12T04:29:00.220

Last Modified

2024-11-21T03:44:49.003

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 5.3 (MEDIUM)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: NONE

Exploitability Score

10.0

Impact Score

2.9

Weaknesses

Type: Primary
CWE-200

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	digium	asterisk	< 13.21.1	Yes
Application	digium	asterisk	< 14.7.7	Yes
Application	digium	asterisk	< 15.4.1	Yes
Application	digium	certified_asterisk	13.18	Yes
Application	digium	certified_asterisk	13.18	Yes
Application	digium	certified_asterisk	13.18	Yes
Application	digium	certified_asterisk	13.21	Yes
Operating System	debian	debian_linux	9.0	Yes

References

http://downloads.asterisk.org/pub/security/AST-2018-008.html Vendor Advisory ([email protected])
http://www.securityfocus.com/bid/104455 Third Party Advisory, VDB Entry ([email protected])
https://issues.asterisk.org/jira/browse/ASTERISK-27818 Patch, Vendor Advisory ([email protected])
https://security.gentoo.org/glsa/201811-11 Third Party Advisory ([email protected])
https://www.debian.org/security/2018/dsa-4320 Third Party Advisory ([email protected])
http://downloads.asterisk.org/pub/security/AST-2018-008.html Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/104455 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://issues.asterisk.org/jira/browse/ASTERISK-27818 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://security.gentoo.org/glsa/201811-11 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.debian.org/security/2018/dsa-4320 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For digium's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.