gst-ffmpeg: Security Advisory - ffmpeg - CVE-2013-0869

The field_end function in libavcodec/h264.c in FFmpeg before 1.1.2
allows remote attackers to have an unspecified impact via crafted H.264
data, related to an SPS and slice mismatch and an out-of-bounds array
access.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0869

(From OE-Core rev: 464123172c92d92fa08e2125c04653590ad654c7)

Signed-off-by: Yue Tao <Yue.Tao@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-h264-skip-error-concealment-when-SPS-and-slices-are-.patch

@@ -0,0 +1,33 @@
+gst-ffmpeg: h264: skip error concealment when SPS and slices are
+ mismatching
+
+Fixes out of array accesses
+
+Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
+Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
+(cherry picked from commit 695af8eed642ff0104834495652d1ee784a4c14d)
+
+Upstream-Status: Backport
+
+Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
+Signed-off-by: Yue Tao <yue.tao@windriver.com>
+---
+ libavcodec/h264.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/libavcodec/h264.c b/libavcodec/h264.c
+index da144db..0aab4e7 100644
+--- a/gst-libs/ext/libav/libavcodec/h264.c
++++ b/gst-libs/ext/libav/libavcodec/h264.c
+@@ -2351,7 +2351,7 @@ static int field_end(H264Context *h, int in_setup)
+      * past end by one (callers fault) and resync_mb_y != 0
+      * causes problems for the first MB line, too.
+      */
+-    if (!FIELD_PICTURE)
++    if (!FIELD_PICTURE && h->current_slice && !h->sps.new)
+         ff_er_frame_end(s);
+ 
+     ff_MPV_frame_end(s);
+-- 
+1.7.5.4
+

meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb

@@ -54,6 +54,7 @@ SRC_URI = "http://gstreamer.freedesktop.org/src/${BPN}/${BPN}-${PV}.tar.bz2 \
            file://0001-lavf-compute-probe-buffer-size-more-reliably.patch \
            file://0001-ffserver-set-oformat.patch \
            file://0001-h264-set-parameters-from-SPS-whenever-it-changes.patch \
+           file://0001-h264-skip-error-concealment-when-SPS-and-slices-are-.patch \
            ${@bb.utils.contains('PACKAGECONFIG', 'libav9', 'file://libav-9.patch', '', d)} \ 
 "