VUPEN Vulnerability Research Team discovered a critical vulnerability in Novell GroupWise. The vulnerability is caused by a buffer overflow error in the "NgwIRecurByWeekdayParam::bywdaylist()" function within the "gwwww1.dll" component when processing a malformed "RRULE" property in a Calendar, which could be exploited by remote unauthenticated attackers to compromise a vulnerable server via a specially crafted email message. Versions 8.0.2 SP2 Hot Patch 2 and below are affected.
e9739b7f115e53c739cde3bd056999eafde0be533a0e278ee536f5712c2718be