CVE-2018-12227 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

http://downloads.asterisk.org/pub/security/AST-2018-008.html http://www.securityfocus.com/bid/104455 https://issues.asterisk.org/jira/browse/ASTERISK-27818 https://security.gentoo.org/glsa/201811-11 https://www.debian.org/security/2018/dsa-4320

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3