Security Vulnerability - GroupWise 8 Internet Agent Weekday RRULE (VCALENDAR) Vulnerability

  • 7009212
  • 19-Aug-2011
  • 26-Apr-2012


Novell GroupWise 8
Novell GroupWise 8 Internet Agent
Affected versions: GroupWise 8.0x up to (and including) 8.02HP2


The GroupWise Internet Agent (GWIA) has a vulnerability in the way that it parses a weekday calendar recurrence (RRULE) variable within a received VCALENDAR message, which could potentially allow an unauthenticated remote attacker to execute arbitrary code on vulnerable installations of GWIA.  This vulnerability affects GWIA running on all supported server OS platforms (Windows, SuSE Linux, & NetWare).
These vulnerabilities were discovered and reported by Anonymous working with TippingPoint's Zero Day Initiative (, ZDI-CAN-1187) and also by Anonymous working with Verisign's iDefense Labs (, V-yl5u7zhuzu


To resolve this issue, apply GroupWise 8.0 Hot Patch 3 (HP3) or later.
Previous versions of GroupWise are likely also vulnerable but are no longer supported. Customers on earlier versions of GroupWise should, at a minimum, upgrade their GWIAs and associated Domains to version 8.02HP3 in order to secure their system.


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