ffmpeg:ffmpeg_AV_CODEC_ID_WMV3IMAGE_fuzzer: Index-out-of-bounds in vc1_decode_ac_coeff

2019-08-10T05:03:19
ID OSSFUZZ-16331
Type ossfuzz
Reporter Google
Modified 2019-10-02T15:40:18

Description

Project: https://git.ffmpeg.org/ffmpeg.git

Detailed report: https://oss-fuzz.com/testcase?key=5672735195267072

Project: ffmpeg Fuzzing engine: libFuzzer Fuzz target: ffmpeg_AV_CODEC_ID_WMV3IMAGE_fuzzer Job Type: libfuzzer_ubsan_ffmpeg Platform Id: linux

Crash Type: Index-out-of-bounds Crash Address: Crash State: vc1_decode_ac_coeff vc1_decode_i_block vc1_decode_i_blocks

Sanitizer: undefined (UBSAN)

Recommended Security Severity: Medium

Regressed: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_ffmpeg&range=201906140151:201906150149

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5672735195267072

Issue filed automatically.

See https://github.com/google/oss-fuzz/blob/master/docs/reproducing.md for instructions to reproduce this bug locally.

This bug is subject to a 90 day disclosure deadline. If 90 days elapse without an upstream patch, then the bug report will automatically become visible to the public.