iDefense Security Advisory 05.24.11 - Remote exploitation of a stack buffer overflow vulnerability in IBM Corp.'s Lotus Notes could allow an attacker to execute arbitrary code in the context of the current user. The vulnerability occurs during the processing of header information contained within a LZH archive file. A length calculation may cause an integer value to underflow and result in a large length value. A memory copy operation using the length value may cause LZH data to overflow the bounds of a stack buffer. This condition may lead to arbitrary code execution. Lotus Notes versions 6.0, 6.5, 7.0, 8.0, 8.5 are vulnerable.
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