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.
*CVSS:
| Base Score: | 7.5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 5.5 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Refer to AST-2007-027 for patch, upgrade, or suggested workaround information. See References.
References:
- AST-2007-027: Database matching order permits host-based authentication to be ignored.
- 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
- 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
- VUPEN/ADV-2007-4260: Asterisk Database Registrations Authentication Bypass Vulnerability
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
Reported:
Dec 18, 2007
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.