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Category:   Application (VoIP)  >   Asterisk Vendors:   Digium (Linux Support Services)
Asterisk Discloses Whether User Accounts Are Valid to Remote Users
SecurityTracker Alert ID:  1021549
SecurityTracker URL:
CVE Reference:   CVE-2009-0041   (Links to External Site)
Date:  Jan 9 2009
Impact:   Disclosure of system information
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.2.x prior to 1.2.31, 1.4.x prior to 1.4.23-rc4, 1.6.x prior to
Description:   A vulnerability was reported in Asterisk. A remote user can determine valid user accounts on the target system.

The IAX2 service responds differently to valid and invalid authentication attempts. A remote user can determine whether the specified user name exists on the target system or not.

The vendor was notified on October 15, 2008. reported this vulnerability.

Impact:   A remote user can determine valid user accounts on the target system.
Solution:   The vendor has issued a fix (1.2.31,,

The vendor's advisory is available at:

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

Message History:   None.

 Source Message Contents

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