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The remote VoIP service can be abused to conduct an amplification
attack against third-party hosts.
The firmware download protocol implemented in the version of Asterisk
running on the remote host does not initiate a handshake. By spoofing
an IAX2 FWDOWNL request, an unauthenticated, remote attacker may be able
to leverage this issue to flood a third-party host with unwanted
firmware packets from the affected host.
See also :
Upgrade to Asterisk Open Source 18.104.22.168 / 1.2.30, Asterisk Business
Edition C.2.0.3 / C.1.10.3 / B.2.5.4, s800i (Asterisk Appliance) 22.214.171.124
Risk factor :
Medium / CVSS Base Score : 5.0
CVSS Temporal Score : 4.1
Public Exploit Available : true
Family: Denial of Service
Nessus Plugin ID: 33564 (asterisk_iax2_spoofed_fwdownl.nasl)
Bugtraq ID: 30350
CVE ID: CVE-2008-3264
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