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gst-ffmpeg: fix CVE-2013-3674

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The cdg_decode_frame function in cdgraphics.c in libavcodec in FFmpeg before
1.2.1 does not validate the presence of non-header data in a buffer, which
allows remote attackers to cause a denial of service (out-of-bounds array
access and application crash) via crafted CD Graphics Video data.

http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-3674

(From OE-Core master rev: f1721553a873b242bc26ad3e4d618aea39dfd507)

(From OE-Core rev: 23f323b80cbef122a4ed0897dfff54bb1b0b8ec0)

Signed-off-by: Ming Liu <ming.liu@windriver.com>
Signed-off-by: Jeff Polk <jeff.polk@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ming Liu
2013-11-21 01:05:05 -06:00
committed by Richard Purdie
parent 90f366ec75
commit 1d31f44f8c
2 changed files with 27 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/gst-ffmpeg-CVE-2013-3674.patch Normal file
View File

@@ -0,0 +1,26 @@
avcodec/cdgraphics: check buffer size before use
Fixes out of array accesses
Backported from:http://git.videolan.org/?p=ffmpeg.git;a=commit;h=ad002e1a13a8df934bd6cb2c84175a4780ab8942
Upstream-status: Backport
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Ming Liu <ming.liu@windriver.com>
diff -urpN a/gst-libs/ext/libav/libavcodec/cdgraphics.c b/gst-libs/ext/libav/libavcodec/cdgraphics.c
--- a/gst-libs/ext/libav/libavcodec/cdgraphics.c 2013-07-18 13:17:08.399876575 +0800
+++ b/gst-libs/ext/libav/libavcodec/cdgraphics.c 2013-07-18 13:18:05.880502267 +0800
@@ -291,7 +291,9 @@ static int cdg_decode_frame(AVCodecConte
inst = bytestream_get_byte(&buf);
inst &= CDG_MASK;
buf += 2; /// skipping 2 unneeded bytes
- bytestream_get_buffer(&buf, cdg_data, buf_size - CDG_HEADER_SIZE);
+
+ if (buf_size > CDG_HEADER_SIZE)
+ bytestream_get_buffer(&buf, cdg_data, buf_size - CDG_HEADER_SIZE);
if ((command & CDG_MASK) == CDG_COMMAND) {
switch (inst) {

1
meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb
View File

@@ -21,6 +21,7 @@ SRC_URI = "http://gstreamer.freedesktop.org/src/${BPN}/${BPN}-${PV}.tar.bz2 \
file://configure-fix.patch \
file://h264_qpel_mmx.patch \
file://libav_e500mc.patch \
file://gst-ffmpeg-CVE-2013-3674.patch \
"
SRC_URI[md5sum] = "7f5beacaf1312db2db30a026b36888c4"