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The remote VoIP service can be abused to conduct an amplification
attack against third-party hosts.
The version of Asterisk running on the remote host does not properly
validate an IAX2 handshake. By spoofing NEW and ACK messages, an
unauthenticated, remote attacker may be able to leverage this issue to
flood a third-party host with packets from the affected host containing
See also :
Upgrade to Asterisk 1.4.20 / 1.2.28, Asterisk Business Edition C.1.8.1
/ B.2.5.2, AsteriskNOW 1.0.3, s800i (Asterisk Appliance) 22.214.171.124 or
Risk factor :
Medium / CVSS Base Score : 5.0
CVSS Temporal Score : 4.3
Public Exploit Available : true
Family: Denial of Service
Nessus Plugin ID: 32132 (asterisk_iax2_spoofed_handshake.nasl)
Bugtraq ID: 28901
CVE ID: CVE-2008-1897CVE-2008-1923
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