Asterisk database-based registration security bypass
| asterisk-registration-security-bypass (39124) |  Medium Risk |
Description:
Asterisk could allow a remote attacker to bypass security restrictions, caused by the failure to check IP addresses when processing a "realtime" database-based registration. By guessing the username of the victim, a remote attacker could exploit this vulnerability to bypass security restrictions and assume the identity of any user that depends on host-based authentication without a password.
Platforms Affected:
- Debian, Debian Linux 4.0
- Digium, Asterisk Business Edition B.x.x prior to B.2.3.6
- Digium, Asterisk Business Edition C.x.x prior to C.1.0-b8
- Digium, Asterisk Open Source 1.2.x prior to 1.2.26
- Digium, Asterisk Open Source 1.4.x prior to 1.4.16
- Gentoo, Linux
Remedy:
Refer to AST-2007-027 for patch, upgrade, or suggested workaround information. See References.
Consequences:
Bypass Security
References:
- AST-2007-027, Database matching order permits host-based authentication to be ignored at http://downloads.digium.com/pub/security/AST-2007-027.pdf.
- BID-26928: Asterisk Host-Based Authentication Security Bypass Vulnerability
- CVE-2007-6430: Asterisk Open Source 1.2.x before 1.2.26 and 1.4.x before 1.4.16, and Business Edition B.x.x before B.2.3.6 and C.x.x before C.1.0-beta8, when using database-based registrations (realtime) and host-based authentication, does not check the IP address when the username is correct and there is no password, which allows remote attackers to bypass authentication using a valid username.
- DSA-1525: asterisk -- several vulnerabilities
- FrSIRT/ADV-2007-4260: Asterisk Database Registrations Authentication Bypass Vulnerability
- GLSA-200804-13: Asterisk: Multiple vulnerabilities
- SA28149: Asterisk Registration Database Security Bypass
- SECTRACK ID: 1019110: Asterisk Lets Remote Users Bypass Host-based Access Controls in Certain Cases
- SUSE-SR:2008:005: SUSE Security Summary Report
Reported:
Dec 18, 2007
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