A vulnerability has been reported in Siemens C450IP / C475IP, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error in the processing of SIP messages. This can be exploited to disconnect all active calls and reboot the device via a specially crafted UDP packet sent to port 5060.
Solution: Restrict network access to the device.
Provided and/or discovered by: sky & Any
Original Advisory: http://milw0rm.com/exploits/7220
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Subject: Siemens C450IP / C475IP Denial of Service Vulnerability
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