Multiple stack-based buffer overflows in Novell GroupWise before 8.02HP allow remote attackers to execute arbitrary code via a long HTTP Host header to (1) gwpoa.exe in the Post Office Agent, (2) gwmta.exe in the Message Transfer Agent, (3) gwia.exe in the Internet Agent, (4) the WebAccess Agent, or (5) the Monitor Agent.
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.