avformat/mxfdec: check index entry array size

Signed-off-by: Marton Balint <cus@passwd.hu>
2 years ago · 6aff3c5e43
parent 757218564d
commit 6aff3c5e43
1 changed files with 5 additions and 1 deletions
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@ -1198,11 +1198,15 @@ static int mxf_read_essence_container_data(void *arg, AVIOContext *pb, int tag,
 static int mxf_read_index_entry_array(AVIOContext *pb, MXFIndexTableSegment *segment)
 {
    int i, length;
+    uint32_t nb_index_entries;

    if (segment->temporal_offset_entries)
        return AVERROR_INVALIDDATA;

-    segment->nb_index_entries = avio_rb32(pb);
+    nb_index_entries = avio_rb32(pb);
+    if (nb_index_entries > INT_MAX)
+        return AVERROR_INVALIDDATA;
+    segment->nb_index_entries = nb_index_entries;

    length = avio_rb32(pb);
    if(segment->nb_index_entries && length < 11)