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Category:   Application (VoIP)  >   Asterisk Vendors:   Digium (Linux Support Services)
Asterisk IAX2 Call Number Consumption Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1022819
SecurityTracker URL:  http://securitytracker.com/id/1022819
CVE Reference:   CVE-2009-2346   (Links to External Site)
Date:  Sep 4 2009
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.2 prior to 1.2.35, 1.4 prior to 1.4.26.2, 1.6.0 prior to 1.6.0.15, 1.6.1 prior to 1.6.1.6
Description:   A vulnerability was reported in Asterisk. A remote user can cause denial of service conditions.

A remote user can consume all available IAX2 call numbers to prevent additional calls from being accepted.

The vendor was notified on June 22, 2008.

Noam Rathaus and Blake Cornell separately reported this vulnerability.

Impact:   A remote user can prevent the target system from accepting calls.
Solution:   The vendor issued a fix (1.2.35, 1.4.26.2, 1.6.0.15, 1.6.1.6).

The vendor's advisory is available at:

http://downloads.asterisk.org/pub/security/AST-2009-006.html

Vendor URL:  downloads.asterisk.org/pub/security/AST-2009-006.html (Links to External Site)
Cause:   Resource error
Underlying OS:  Linux (Any), UNIX (Any)

Message History:   None.


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