This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Shockwave. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the DIRAPIX module responsible for parsing the RIFF-based Director file format. When handling the mmap chunk, the process trusts the chunk size immediately following the fourCC value. It is passed to Ordinal1111 exported by the IML32X module which is responsible for allocating a heap buffer for processing the rest of the chunk. If an incorrect size is provided, later memory copies can corrupt data beyond the allocated buffer. This can be abused to execute remote code under the context of the user running the web browser.
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