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avformat/ipmovie: Check palette size in OPCODE_SET_PALETTE 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-12-18 23:46:37 +01:00
parent 947e40b9fe
commit 4e575adeff
1 changed files with 2 additions and 1 deletions
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libavformat/ipmovie.c
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@ -465,7 +465,8 @@ static int process_ipmovie_chunk(IPMVEContext *s, AVIOContext *pb,
first_color = AV_RL16(&scratch[0]);
last_color = first_color + AV_RL16(&scratch[2]) - 1;
/* sanity check (since they are 16 bit values) */
if ((first_color > 0xFF) || (last_color > 0xFF)) {
if ( (first_color > 0xFF) || (last_color > 0xFF)
|| (last_color - first_color + 1)*3 + 4 > opcode_size) {
av_dlog(NULL, "demux_ipmovie: set_palette indexes out of range (%d -> %d)\n",
first_color, last_color);
chunk_type = CHUNK_BAD;