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Category:   Application (VoIP)  >   Asterisk Vendors:   Digium (Linux Support Services)
Asterisk Lets Remote Users Bypass Host-based Access Controls in Certain Cases
SecurityTracker Alert ID:  1019110
SecurityTracker URL:
CVE Reference:   CVE-2007-6430   (Links to External Site)
Date:  Dec 18 2007
Impact:   Host/resource access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to 1.4.16
Description:   A vulnerability was reported in Asterisk. A remote user can bypass access controls in certain cases.

When a "realtime" database-based registration is processed and the username is correct and there is no password, the system does not check the IP address. A remote user can impersonate arbitrary users that rely on host-based authentication without a password.

Both the SIP and IAX protocols are affected.

The vendor was notified on October 30, 2007.

Tilghman Lesher reported this vulnerability.

Impact:   A remote user can bypass access controls in certain cases.
Solution:   The vendor has issued a fixed version (1.4.16).

The Asterisk advisory is available at:

Vendor URL: (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.

 Source Message Contents

Subject:  AST-2007-027 - Database matching order permits host-based authentication to be ignored


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