CVE-2022-47095: Buffer overflow in hevc_parse_vps_extension function of media_tools/av_parsers.c · Issue #2346 · gpac/gpac

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Description

Buffer overflow in hevc_parse_vps_extension function of media_tools/av_parsers.c

for (i = 0; i < (num_scalability_types - splitting_flag); i++) { dimension_id_len[i] = 1 + gf_bs_read_int_log_idx(bs, 3, "dimension_id_len_minus1", i); // overflow at dimension_id_len }

Version info

MP4Box - GPAC version 2.1-DEV-rev574-g9d5bb184b-master
(c) 2000-2022 Telecom Paris distributed under LGPL v2.1+ - http://gpac.io

Please cite our work in your research:
    GPAC Filters: https://doi.org/10.1145/3339825.3394929
    GPAC: https://doi.org/10.1145/1291233.1291452

GPAC Configuration: --enable-sanitizer
Features: GPAC_CONFIG_LINUX GPAC_64_BITS GPAC_HAS_IPV6 GPAC_HAS_SSL GPAC_HAS_SOCK_UN GPAC_MINIMAL_ODF GPAC_HAS_QJS GPAC_HAS_LINUX_DVB  GPAC_DISABLE_3D

Reproduce

compile and run

./configure --enable-sanitizer
make
./MP4Box import -add poc_bof6.mp4

Crash reported by sanitizer

[Core] exp-golomb read failed, not enough bits in bitstream !
[HEVC] Warning: Error parsing NAL unit
media_tools/av_parsers.c:7633:19: runtime error: index 16 out of bounds for type 'u8 [16]'

POC

poc_bof6.zip

Impact

Potentially causing DoS and RCE

Credit

Xdchase