From 983f90ef1819a0d4d3a5685b8a617a18eaecbd4b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=E5=AD=99=E6=B5=A9=20and=20=E5=BC=A0=E6=B4=AA=E4=BA=AE=28?= =?UTF-8?q?=E6=9C=9B=E5=88=9D=29?= Date: Fri, 25 Aug 2017 01:15:27 +0200 Subject: [PATCH] avformat/cinedec: Fix DoS due to lack of eof check Fixes: loop.cine Found-by: Xiaohei and Wangchu from Alibaba Security Team Signed-off-by: Michael Niedermayer (cherry picked from commit 7e80b63ecd259d69d383623e75b318bf2bd491f6) Signed-off-by: Michael Niedermayer --- libavformat/cinedec.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/libavformat/cinedec.c b/libavformat/cinedec.c index 0583ce020a..22af00771c 100644 --- a/libavformat/cinedec.c +++ b/libavformat/cinedec.c @@ -267,8 +267,12 @@ static int cine_read_header(AVFormatContext *avctx) /* parse image offsets */ avio_seek(pb, offImageOffsets, SEEK_SET); - for (i = 0; i < st->duration; i++) + for (i = 0; i < st->duration; i++) { + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; + av_add_index_entry(st, avio_rl64(pb), i, 0, 0, AVINDEX_KEYFRAME); + } return 0; }