Integer overflow in the read_SubStreamsInfo function in archive_read_support_format_7zip.c in libarchive before 3.2.1 allows remote attackers to execute arbitrary code via a 7zip file with a large number of substreams, which triggers a heap-based buffer overflow. A vulnerability was found in libarchive's handling of 7zip data. A specially crafted 7zip file can cause a integer overflow resulting in memory corruption that can lead to code execution.
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