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Category:   Application (VoIP)  >   Asterisk Vendors:   Digium (Linux Support Services)
Asterisk IAX2 Protocol Verification Bug Lets Remote Users Deny Service
SecurityTracker Alert ID:  1019918
SecurityTracker URL:
CVE Reference:   CVE-2008-1897   (Links to External Site)
Date:  Apr 23 2008
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.2.x prior to 1.2.28, 1.4.x prior to
Description:   A vulnerability was reported in Asterisk. A remote user can cause denial of service conditions.

A remote user can send a spoofed ACK response message to cause the target system to send audio connection packets to an arbitrary system, potentially causing denial of service conditions on the arbitrary system.

The original advisory is available at:

Joel R. Voss (aka Javantea) reported this vulnerability.

Impact:   A remote user can cause denial of service conditions on a target system via an intermediate system.
Solution:   The vendor has issued fixed versions (1.2.28,

The vendor's advisory is available at:

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

Message History:   None.

 Source Message Contents

[Original Message Not Available for Viewing]

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