From: Yue Tao <[email protected]> The decode_mb function in libavcodec/error_resilience.c in FFmpeg before 0.10 allows remote attackers to have an unspecified impact via vectors related to an uninitialized block index, which triggers an out-of-bound write.
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-3941 Signed-off-by: Yue Tao <[email protected]> Signed-off-by: Roy Li <[email protected]> --- ...-error-concealment-initialize-block-index.patch | 29 ++++++++++++++++++++ .../gstreamer/gst-ffmpeg_0.10.13.bb | 1 + 2 files changed, 30 insertions(+) create mode 100644 meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-error-concealment-initialize-block-index.patch diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-error-concealment-initialize-block-index.patch b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-error-concealment-initialize-block-index.patch new file mode 100644 index 0000000..bd11c88 --- /dev/null +++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-error-concealment-initialize-block-index.patch @@ -0,0 +1,29 @@ +gst-ffmpeg: error concealment: initialize block index. + +Fixes CVE-2011-3941 (out of bounds write) + +Upstream-Status: Pending + +Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind +Signed-off-by: Michael Niedermayer <[email protected]> +--- + libavcodec/error_resilience.c | 3 +++ + 1 files changed, 3 insertions(+), 0 deletions(-) + +diff --git a/libavcodec/error_resilience.c b/libavcodec/error_resilience.c +index 8bb5d0c..d55c000 100644 +--- a/gst-libs/ext/libav/libavcodec/error_resilience.c ++++ b/gst-libs/ext/libav/libavcodec/error_resilience.c +@@ -45,6 +45,9 @@ static void decode_mb(MpegEncContext *s, int ref){ + s->dest[1] = s->current_picture.data[1] + (s->mb_y * (16>>s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16>>s->chroma_x_shift); + s->dest[2] = s->current_picture.data[2] + (s->mb_y * (16>>s->chroma_y_shift) * s->uvlinesize) + s->mb_x * (16>>s->chroma_x_shift); + ++ ff_init_block_index(s); ++ ff_update_block_index(s); ++ + if(CONFIG_H264_DECODER && s->codec_id == CODEC_ID_H264){ + H264Context *h= (void*)s; + h->mb_xy= s->mb_x + s->mb_y*s->mb_stride; +-- +1.7.5.4 + 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 c3681b6..dd07435 100644 --- a/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb +++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb @@ -49,6 +49,7 @@ SRC_URI = "http://gstreamer.freedesktop.org/src/${BPN}/${BPN}-${PV}.tar.bz2 \ file://0001-huffyuvdec-check-width-more-completely-avoid-out-of-.patch \ file://0001-smackerdec-Check-that-the-last-indexes-are-within-th.patch \ file://0001-avcodec-dsputil-fix-signedness-in-sizeof-comparissio.patch \ + file://0001-error-concealment-initialize-block-index.patch \ " SRC_URI[md5sum] = "7f5beacaf1312db2db30a026b36888c4" -- 1.7.10.4 -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
