Multiple stack-based buffer overflows in Novell GroupWise Messenger (GWIM) Client before 2.0.3 HP1 for Windows allow remote attackers to execute arbitrary code via "spoofed server responses" that contain a long string after the NMASZTRANSACTIONID field name.
The server process in Novell Messenger 2.1 and 2.2.x before 2.2.1, and Novell GroupWise Messenger 2.04 and earlier, allows remote attackers to read from arbitrary memory locations via a crafted command.
Novell GroupWise Messenger (GWIM) before 2.0.3 Hot Patch 1 allows remote attackers to cause a denial of service (crash) via a long user ID, possibly involving a popup alert. NOTE: it is not clear whether this issue crosses privilege boundaries.