[OE-core] [PATCH 04/12] ffmpeg: fix for Security Advisory CVE-2013-0868
Saul Wold
sgw at linux.intel.com
Mon May 19 15:39:55 UTC 2014
On 05/15/2014 07:12 PM, rongqing.li at windriver.com wrote:
> From: Yue Tao <Yue.Tao at windriver.com>
>
> libavcodec/huffyuvdec.c in FFmpeg before 1.1.2 allows remote attackers
> to have an unspecified impact via crafted Huffyuv data, related to an
> out-of-bounds write and (1) unchecked return codes from the init_vlc
> function and (2) len==0 cases.
>
> http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0868
>
> Signed-off-by: Yue Tao <Yue.Tao at windriver.com>
> Signed-off-by: Roy Li <rongqing.li at windriver.com>
> ---
> ...01-huffyuvdec-Check-init_vlc-return-codes.patch | 87 ++++++++++++++++++++
> .../0001-huffyuvdec-Skip-len-0-cases.patch | 59 +++++++++++++
> .../gstreamer/gst-ffmpeg_0.10.13.bb | 2 +
> 3 files changed, 148 insertions(+)
> create mode 100644 meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Check-init_vlc-return-codes.patch
> create mode 100644 meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Skip-len-0-cases.patch
>
> diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Check-init_vlc-return-codes.patch b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Check-init_vlc-return-codes.patch
> new file mode 100644
> index 0000000..e859e44
> --- /dev/null
> +++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Check-init_vlc-return-codes.patch
> @@ -0,0 +1,87 @@
> +From b666debffec1fcbb19ef377635a53b9a58bca8a4 Mon Sep 17 00:00:00 2001
> +From: Michael Niedermayer <michaelni at gmx.at>
> +Date: Tue, 29 Jan 2013 18:29:41 +0100
> +Subject: [PATCH] huffyuvdec: Check init_vlc() return codes.
> +
> +Upstream-Status: Backport
> +
> +Commit b666debffec1fcbb19ef377635a53b9a58bca8a4 release/1.0
> +
> +Prevents out of array writes
> +
> +Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
> +Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> +(cherry picked from commit f67a0d115254461649470452058fa3c28c0df294)
> +
> +Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> +---
> + libavcodec/huffyuv.c | 14 ++++++++++----
> + 1 file changed, 10 insertions(+), 4 deletions(-)
> +
> +diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c
> +index 58da789..993e524 100644
> +--- a/gst-libs/ext/libav/libavcodec/huffyuv.c
> ++++ b/gst-libs/ext/libav/libavcodec/huffyuv.c
> +@@ -33,6 +33,7 @@
> + #include "put_bits.h"
> + #include "dsputil.h"
> + #include "thread.h"
> ++#include "libavutil/avassert.h"
> +
> + #define VLC_BITS 11
> +
> +@@ -287,6 +287,7 @@ static void generate_joint_tables(HYuvCo
> + int len1 = s->len[p][u];
> + if (len1 > limit || !len1)
> + continue;
> ++ av_assert0(i < (1 << VLC_BITS));
> + len[i] = len0 + len1;
> + bits[i] = (s->bits[0][y] << len1) + s->bits[p][u];
> + symbols[i] = (y<<8) + u;
> +@@ -320,6 +321,7 @@ static void generate_joint_tables(HYuvCo
> + int len2 = s->len[2][r&255];
> + if (len2 > limit1 || !len2)
> + continue;
> ++ av_assert0(i < (1 << VLC_BITS));
> + len[i] = len0 + len1 + len2;
> + bits[i] = (code << len2) + s->bits[2][r&255];
> + if(s->decorrelate){
> +@@ -343,6 +345,7 @@ static void generate_joint_tables(HYuvCo
> + static int read_huffman_tables(HYuvContext *s, const uint8_t *src, int length){
> + GetBitContext gb;
> + int i;
> ++ int ret;
> +
> + init_get_bits(&gb, src, length*8);
> +
> +@@ -353,7 +356,9 @@ static int read_huffman_tables(HYuvConte
> + return -1;
> + }
> + free_vlc(&s->vlc[i]);
> +- init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0);
> ++ if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
> ++ s->bits[i], 4, 4, 0)) < 0)
> ++ return ret;
> + }
> +
> + generate_joint_tables(s);
> +@@ -365,6 +370,7 @@ static int read_old_huffman_tables(HYuvC
> + #if 1
> + GetBitContext gb;
> + int i;
> ++ int ret;
> +
> + init_get_bits(&gb, classic_shift_luma, sizeof(classic_shift_luma)*8);
> + if(read_len_table(s->len[0], &gb)<0)
> +@@ -385,7 +391,9 @@ static int read_old_huffman_tables(HYuvC
> +
> + for(i=0; i<3; i++){
> + free_vlc(&s->vlc[i]);
> +- init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1, s->bits[i], 4, 4, 0);
> ++ if ((ret = init_vlc(&s->vlc[i], VLC_BITS, 256, s->len[i], 1, 1,
> ++ s->bits[i], 4, 4, 0)) < 0)
> ++ return ret;
> + }
> +
> + generate_joint_tables(s);
> +--
> diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Skip-len-0-cases.patch b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Skip-len-0-cases.patch
> new file mode 100644
> index 0000000..68bc966
> --- /dev/null
> +++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-huffyuvdec-Skip-len-0-cases.patch
> @@ -0,0 +1,59 @@
> +From db0f7f7394e1f994ed38db043f78ed0f10bde0da Mon Sep 17 00:00:00 2001
> +From: Michael Niedermayer <michaelni at gmx.at>
> +Date: Tue, 29 Jan 2013 19:22:33 +0100
> +Subject: [PATCH] huffyuvdec: Skip len==0 cases
> +
> +Commit db0f7f7394e1f994ed38db043f78ed0f10bde0da release/1.0
> +
> +Fixes vlc decoding for hypothetical files that would contain such cases.
> +
> +Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> +(cherry picked from commit 0dfc01c2bbf4b71bb56201bc4a393321e15d1b31)
> +
Missing Upstream-Status
Sau!
> +Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> +---
> + libavcodec/huffyuv.c | 10 +++++-----
> + 1 file changed, 5 insertions(+), 5 deletions(-)
> +
> +diff --git a/libavcodec/huffyuv.c b/libavcodec/huffyuv.c
> +index 993e524..72ed351 100644
> +--- a/gst-libs/ext/libav/libavcodec/huffyuv.c
> ++++ b/gst-libs/ext/libav/libavcodec/huffyuv.c
> +@@ -281,11 +281,11 @@ static void generate_joint_tables(HYuvCo
> + for(i=y=0; y<256; y++){
> + int len0 = s->len[0][y];
> + int limit = VLC_BITS - len0;
> +- if(limit <= 0)
> ++ if(limit <= 0 || !len0)
> + continue;
> + for(u=0; u<256; u++){
> + int len1 = s->len[p][u];
> +- if(len1 > limit)
> ++ if (len1 > limit || !len1)
> + continue;
> + len[i] = len0 + len1;
> + bits[i] = (s->bits[0][y] << len1) + s->bits[p][u];
> +@@ -308,17 +308,17 @@ static void generate_joint_tables(HYuvCo
> + for(i=0, g=-16; g<16; g++){
> + int len0 = s->len[p0][g&255];
> + int limit0 = VLC_BITS - len0;
> +- if(limit0 < 2)
> ++ if (limit0 < 2 || !len0)
> + continue;
> + for(b=-16; b<16; b++){
> + int len1 = s->len[p1][b&255];
> + int limit1 = limit0 - len1;
> +- if(limit1 < 1)
> ++ if (limit1 < 1 || !len1)
> + continue;
> + code = (s->bits[p0][g&255] << len1) + s->bits[p1][b&255];
> + for(r=-16; r<16; r++){
> + int len2 = s->len[2][r&255];
> +- if(len2 > limit1)
> ++ if (len2 > limit1 || !len2)
> + continue;
> + len[i] = len0 + len1 + len2;
> + bits[i] = (code << len2) + s->bits[2][r&255];
> +--
> +1.8.5.2.233.g932f7e4
> +
> diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb b/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb
> index 05cc404..847b927 100644
> --- a/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb
> +++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb
> @@ -26,6 +26,8 @@ SRC_URI = "http://gstreamer.freedesktop.org/src/${BPN}/${BPN}-${PV}.tar.bz2 \
> file://0001-avformat-mpegtsenc-Check-data-array-size-in-mpegts_w.patch \
> file://0001-vqavideo-check-chunk-sizes-before-reading-chunks.patch \
> file://0001-avcodec-msrle-use-av_image_get_linesize-to-calculate.patch \
> + file://0001-huffyuvdec-Skip-len-0-cases.patch \
> + file://0001-huffyuvdec-Check-init_vlc-return-codes.patch \
> "
>
> SRC_URI[md5sum] = "7f5beacaf1312db2db30a026b36888c4"
>
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