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omadec: check GEOB sizes against buffer size

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: David Goldwich <david.goldwich@gmail.com>
CC:libav-stable@libav.org
Signed-off-by: Anton Khirnov <anton@khirnov.net>
This commit is contained in:
Michael Niedermayer 2013-10-24 15:24:25 +02:00 committed by Anton Khirnov
parent 97f50e92b5
commit 1c736bedd9
1 changed files with 5 additions and 0 deletions
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5
libavformat/omadec.c
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@ -237,6 +237,11 @@ static int decrypt_init(AVFormatContext *s, ID3v2ExtraMeta *em, uint8_t *header)
av_log(s, AV_LOG_ERROR, "Invalid encryption header\n");
return AVERROR_INVALIDDATA;
}
if (OMA_ENC_HEADER_SIZE + oc->k_size + oc->e_size + oc->i_size + 8 > geob->datasize ||
OMA_ENC_HEADER_SIZE + 48 > geob->datasize) {
av_log(s, AV_LOG_ERROR, "Too little GEOB data\n");
return AVERROR_INVALIDDATA;
}
oc->rid = AV_RB32(&gdata[OMA_ENC_HEADER_SIZE + 28]);
av_log(s, AV_LOG_DEBUG, "RID: %.8x\n", oc->rid);