iDefense Security Advisory 09.26.11 - Remote exploitation of a memory corruption vulnerability in Novell Inc.'s GroupWise could allow an attacker to execute arbitrary code with the privileges of the affected service. This vulnerability is present in the calendar processing code, which resides within the GroupWise Internet Agent (GWIA) process. The vulnerability occurs when parsing a malformed calendar recurrence (RRULE) that recurs yearly. When adding a sequence of dates, it is possible to trigger an invalid array indexing vulnerability, and write beyond the bounds of a heap buffer. This can lead to the execution of arbitrary code. Novell GroupWise 8.0x up to (and including) 8.02HP2 are vulnerable.
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