RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

avformat/icodec: Check nb_pal 

Fixes: signed integer overflow: 538976288 * 4 cannot be represented in type 'int'
Fixes: 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_ICO_fuzzer-6690068904935424

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit db73ae0dc1)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-09-17 23:15:56 +02:00
parent b591a55e7a
commit 2cdc8254eb
No known key found for this signature in database
GPG Key ID: B18E8928B3948D64
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavformat/icodec.c
View File

@ -203,6 +203,9 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt)
AV_WL32(buf + 32, image->nb_pal);
}
if (image->nb_pal > INT_MAX / 4 - 14 - 40)
return AVERROR_INVALIDDATA;
AV_WL32(buf - 4, 14 + 40 + image->nb_pal * 4);
AV_WL32(buf + 8, AV_RL32(buf + 8) / 2);
}