From 96f24d1bee7fe7bac08e2b7c74db1a046c9dc0de 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 01:15:29 +0200 Subject: [PATCH] avformat/rl2: Fix DoS due to lack of eof check Fixes: loop.rl2 Found-by: Xiaohei and Wangchu from Alibaba Security Team Signed-off-by: Michael Niedermayer CVE: CVE-2017-14056 Upstream-Status: Backport Signed-off-by: Chen Qi --- libavformat/rl2.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/libavformat/rl2.c b/libavformat/rl2.c index 0bec8f1..eb1682d 100644 --- a/libavformat/rl2.c +++ b/libavformat/rl2.c @@ -170,12 +170,21 @@ static av_cold int rl2_read_header(AVFormatContext *s) } /** read offset and size tables */ - for(i=0; i < frame_count;i++) + for(i=0; i < frame_count;i++) { + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; chunk_size[i] = avio_rl32(pb); - for(i=0; i < frame_count;i++) + } + for(i=0; i < frame_count;i++) { + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; chunk_offset[i] = avio_rl32(pb); - for(i=0; i < frame_count;i++) + } + for(i=0; i < frame_count;i++) { + if (avio_feof(pb)) + return AVERROR_INVALIDDATA; audio_size[i] = avio_rl32(pb) & 0xFFFF; + } /** build the sample index */ for(i=0;i