Secunia Research has discovered a vulnerability in Adobe Shockwave Player, which may be exploited by malicious people to compromise a user's system. The vulnerability is caused by a logic error in TextXtra.x32 when parsing "DEMX" chunks. This can be exploited to cause a heap-based buffer overflow via a specially crafted Director file as a function does not reallocate a buffer to contain a section of data as expected, but another function to still copy chunk data into the insufficiently sized buffer. Successful exploitation allows execution of arbitrary code.
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