Public Date:
928777: CVE-2013-2264 asterisk: Username disclosure in SIP channel driver (AST-2013-003)

The MITRE CVE dictionary describes this issue as:

The SIP channel driver in Asterisk Open Source 1.8.x before, 10.x before 10.12.2, and 11.x before 11.2.2&#59; Certified Asterisk 1.8.15 before 1.8.15-cert2&#59; Asterisk Business Edition (BE) C.3.x before C.3.8.1&#59; and Asterisk Digiumphones 10.x-digiumphones before 10.12.2-digiumphones exhibits different behavior for invalid INVITE, SUBSCRIBE, and REGISTER transactions depending on whether the user account exists, which allows remote attackers to enumerate account names by (1) reading HTTP status codes, (2) reading additional text in a 403 (aka Forbidden) response, or (3) observing whether certain retransmissions occur.

Find out more about CVE-2013-2264 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 2.6
Base Metrics AV:N/AC:H/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).