Multiple vulnerabilities have been identified in Cisco Unified IP Phones, which could be exploited by attackers to cause a denial of service or take complete control of an affected device.
The first issue is caused by a buffer overflow error when parsing DNS responses, which could be exploited by attackers to crash an affected device or execute arbitrary code.
The second vulnerability is caused by an error when handling large ICMP echo request packets, which could be exploited to reboot a vulnerable device, creating a denial of service condition.
The third issue is caused by an error when handling a specially crafted HTTP request sent to port 80/TCP, which could be exploited to reboot a vulnerable device, creating a denial of service condition.
The fourth issue is caused by a buffer overflow error in the internal Secure Shell (SSH) server when processing malformed packets, which could be exploited by unauthenticated attackers to crash a vulnerable device or execute arbitrary code.
The fifth vulnerability is caused by a buffer overflow error when handling SIP messages with malformed Multipurpose Internet Mail Extensions (MIME) encoded data, which could be exploited by attackers to crash a vulnerable device or execute arbitrary code.
The sixth issue is caused by a buffer overflow error in the internal telnet server (disabled by default) when processing malformed packets, which could be exploited by attackers to crash a vulnerable device or execute arbitrary code.
The seventh vulnerability is caused by a heap overflow error when handling a malformed challenge/response message from a SIP proxy, which could be exploited by attackers to crash a vulnerable device or execute arbitrary code.
Credits
Vulnerabilities reported by Jon Griffin and Mustaque Ahamad of the School (Computer Science at the Georgia Institute of Technology), Sven Weizenegger (T-Systems), and the vendor.
ChangeLog
2008-02-14 : Initial release
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