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| author | 孙浩(晓黑) <tony.sh@alibaba-inc.com> | 2017-08-29 23:59:21 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-09-01 03:04:24 +0200 |
| commit | 74c067e95572dd4bfb069123f44d68b8a12e1991 (patch) | |
| tree | a0a26fe259be521867b15c3fff0d3ed73cf52460 | |
| parent | c6d3640cf71ce1ada67a5d488fc4db92f84a0dd6 (diff) | |
| download | ffmpeg-74c067e95572dd4bfb069123f44d68b8a12e1991.tar.gz | |
avformat/mxfdec: Fix DoS issues in mxf_read_index_entry_array()
Fixes: 20170829A.mxf
Co-Author: 张洪亮(望初)" <wangchu.zhl@alibaba-inc.com>
Found-by: Xiaohei and Wangchu from Alibaba Security Team
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 900f39692ca0337a98a7cf047e4e2611071810c2)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mxfdec.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 173a769ada..ae518f9a88 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -887,6 +887,8 @@ static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *seg segment->nb_index_entries = avio_rb32(pb); length = avio_rb32(pb); + if(segment->nb_index_entries && length < 11) + return AVERROR_INVALIDDATA; if (!(segment->temporal_offset_entries=av_calloc(segment->nb_index_entries, sizeof(*segment->temporal_offset_entries))) || !(segment->flag_entries = av_calloc(segment->nb_index_entries, sizeof(*segment->flag_entries))) || @@ -897,6 +899,8 @@ static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *seg } for (i = 0; i < segment->nb_index_entries; i++) { + if(avio_feof(pb)) + return AVERROR_INVALIDDATA; segment->temporal_offset_entries[i] = avio_r8(pb); avio_r8(pb); /* KeyFrameOffset */ segment->flag_entries[i] = avio_r8(pb); |