From 17ba719d9ba30c970f65747f42d5fbb1e447ca28 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Sun, 14 Dec 2014 21:01:59 +0100 Subject: [PATCH] mmvideo: check frame dimensions The frame size must be set by the caller and each dimension must be a multiple of 2. CC: libav-stable@libav.org Bug-ID: CVE-2014-8543 Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind --- libavcodec/mmvideo.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/libavcodec/mmvideo.c b/libavcodec/mmvideo.c index d80c832a31..25124a3edf 100644 --- a/libavcodec/mmvideo.c +++ b/libavcodec/mmvideo.c @@ -61,6 +61,13 @@ static av_cold int mm_decode_init(AVCodecContext *avctx) avctx->pix_fmt = AV_PIX_FMT_PAL8; + if (!avctx->width || !avctx->height || + (avctx->width & 1) || (avctx->height & 1)) { + av_log(avctx, AV_LOG_ERROR, "Invalid video dimensions: %dx%d\n", + avctx->width, avctx->height); + return AVERROR(EINVAL); + } + s->frame = av_frame_alloc(); if (!s->frame) return AVERROR(ENOMEM);