ffmpeg | branch: release/2.2 | Katerina Barone-Adesi <kateri...@gmail.com> | Tue Sep 16 01:40:24 2014 +0200| [d14696c99ccac12a052ce10e70859ffc0293ed6a] | committer: Diego Biurrun
apetag: Fix APE tag size check The size variable is (correctly) unsigned, but is passed to several functions which take signed parameters, such as avio_read, sometimes after having numbers added to it. So ensure that size remains within the bounds that these functions can handle. (cherry picked from commit b45ab61b24a8f2aeafdd4451491b1b30b7875ee5) Signed-off-by: Diego Biurrun <di...@biurrun.de> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=d14696c99ccac12a052ce10e70859ffc0293ed6a --- libavformat/apetag.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/libavformat/apetag.c b/libavformat/apetag.c index d4be91c..9616c2c 100644 --- a/libavformat/apetag.c +++ b/libavformat/apetag.c @@ -55,8 +55,10 @@ static int ape_tag_read_field(AVFormatContext *s) av_log(s, AV_LOG_WARNING, "Invalid APE tag key '%s'.\n", key); return -1; } - if (size >= UINT_MAX) - return -1; + if (size > INT32_MAX - FF_INPUT_BUFFER_PADDING_SIZE) { + av_log(s, AV_LOG_ERROR, "APE tag size too large.\n"); + return AVERROR_INVALIDDATA; + } if (flags & APE_TAG_FLAG_IS_BINARY) { uint8_t filename[1024]; enum AVCodecID id; _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
