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Asterisk IAX2 Firmware Provisioning Packet Amplification Remote Denial of Service Vulnerability

Asterisk servers may be used to carry out remote denial-of-service attacks. This issue is caused by a flaw in the IAX2 firmware download protocol.

Successful exploits result in packet-amplification attacks. Malicious users can cause Asterisk servers to send large numbers of unwanted firmware packets to arbitrary addresses, potentially denying service to computers and networks because of flooding.