Buffer overflow in the Polycom SoundPoint IP 601 SIP phone with BootROM 3.0.x+ and SIP version 1.6.3.0067 allows remote attackers to cause a denial of service (device hang or reboot) via an INVITE message with a long Via header.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.