VoIP security solutions from Cisco
by Lin Freestone
February 16, 2008
Cisco has brought out two security solutions to defend against potentially dangerous exploits via its VoIP kit, including the possibility of malicious code being injected into vulnerable networks.
Vulnerabilities in Cisco IP Phones and its Unified Communications Manager call management software are covered.
A range of Cisco 7900 Series IP Phones are subject to multiple flaws. Some of these may be vulnerable to attacks involving the execution of arbitrary code. Malicious DNS responses, a bug on the phone's SSH server and flaws in the handling of MIME on SIP messages all create buffer overflow risks.
Other bugs can cause vulnerable phones to crash. The bugs affect ranges of Cisco Unified IP Phone devices running both SIP firmware and SCCP firmware.
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