iDefense Security Advisory 09.26.11 - Remote exploitation of a heap overflow 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 time zone description field (TZNAME). A heap based buffer overflow can be triggered by supplying an excessively long string when copying the time zone name. Novell GroupWise 8.0x up to (and including) 8.02HP2 are vulnerable.
e41ab71e11203562d3548c254ffc04693eed7151c500e97d4f2b72313daa62d2Secunia Research has discovered a vulnerability in Novell GroupWise, which can be exploited by malicious people to compromise a vulnerable system. The vulnerability is caused by an integer truncation error in NgwiCalVTimeZoneBody::ParseSelf() within gwwww1.dll when GroupWise Internet Agent parses "TZNAME" variables in VCALENDAR data. This can be exploited to cause a heap-based buffer overflow via a specially crafted e-mail containing an overly long "TZNAME" property value. Successful exploitation may allow execution of arbitrary code.
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