Test ID:	1.3.6.1.4.1.25623.1.0.900293
Category:	General
Title:	Asterisk SIP REGISTER Response Username Enumeration Vulnerability (AST-2011-011)
Summary:	Asterisk Server is prone to username enumeration vulnerability.
Description:	Summary: Asterisk Server is prone to username enumeration vulnerability. Vulnerability Insight: The problem is that different responses are being sent when using a valid or an invalid username in REGISTER messages. This can be exploited to determine valid usernames by sending specially crafted REGISTER messages. Vulnerability Impact: Successful exploitation will allow attacker to obtain valid username that could aid in further attacks. Affected Software/OS: Asterisk Business Edition versions C.3.x and Asterisk Open Source versions 1.4.x, 1.6.2.x, 1.8.x. Solution: Updates are available. Please see the referenced AST advisory for more information. CVSS Score: 5.0 CVSS Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Cross-Ref:	Common Vulnerability Exposure (CVE) ID: CVE-2011-2536 http://www.securitytracker.com/id?1025734
Copyright	Copyright (C) 2011 Greenbone AG

This is only one of 145615 vulnerability tests in our test suite. Find out more about running a complete security audit. To run a free test of this vulnerability against your system, register below.