Show plain JSON{"containers": {"cna": {"affected": [{"product": "FFMPEG", "vendor": "FFMPEG", "versions": [{"lessThan": "unspecified", "status": "affected", "version": "5.1", "versionType": "custom"}, {"lessThan": "unspecified", "status": "affected", "version": "ab77b878f1205225c6de1370fb0e998dbcc8bc69", "versionType": "custom"}, {"lessThan": "c953baa084607dd1d84c3bfcce3cf6a87c3e6e05", "status": "affected", "version": "unspecified", "versionType": "custom"}]}], "datePublic": "2022-08-27T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "A heap out-of-bounds memory write exists in FFMPEG since version 5.1. The size calculation in `build_open_gop_key_points()` goes through all entries in the loop and adds `sc->ctts_data[i].count` to `sc->sample_offsets_count`. This can lead to an integer overflow resulting in a small allocation with `av_calloc()`. An attacker can cause remote code execution via a malicious mp4 file. 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