A vulnerability has been identified in Asterisk, which could be exploited by attackers to bypass security restrictions. This issue is caused by an error in the the way database-based registrations (realtime) are handled, which could be exploited by attackers to impersonate any user using host-based authentication without a secret, simply by guessing the username of that user.
Credits
Vulnerability reported by Tilghman Lesher.
ChangeLog
2007-12-19 : Initial release
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