From: Yue Tao <[email protected]> The ff_add_png_paeth_prediction function in libavcodec/pngdec.c in FFmpeg before 1.1.3 allows remote attackers to have an unspecified impact via a crafted PNG image, related to an out-of-bounds array access.
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-0875 Signed-off-by: Yue Tao <[email protected]> Signed-off-by: Roy Li <[email protected]> --- ...er-dont-access-out-of-array-elements-at-t.patch | 44 ++++++++++++++++++++ .../gstreamer/gst-ffmpeg_0.10.13.bb | 1 + 2 files changed, 45 insertions(+) create mode 100644 meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-pngdec-filter-dont-access-out-of-array-elements-at-t.patch diff --git a/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-pngdec-filter-dont-access-out-of-array-elements-at-t.patch b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-pngdec-filter-dont-access-out-of-array-elements-at-t.patch new file mode 100644 index 0000000..cea46f6 --- /dev/null +++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg-0.10.13/0001-pngdec-filter-dont-access-out-of-array-elements-at-t.patch @@ -0,0 +1,44 @@ +gst-ffmpeg: pngdec/filter: dont access out of array elements at the end + +Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind + +Upstream-Status: Pending + +Signed-off-by: Yue Tao <[email protected]> +--- + libavcodec/pngdec.c | 12 ++++-------- + 1 files changed, 4 insertions(+), 8 deletions(-) + +diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c +index 97c0ad1..193e35e 100644 +--- a/gst-libs/ext/libav/libavcodec/pngdec.c ++++ b/gst-libs/ext/libav/libavcodec/pngdec.c +@@ -190,7 +190,7 @@ void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w + if(bpp >= 2) g = dst[1];\ + if(bpp >= 3) b = dst[2];\ + if(bpp >= 4) a = dst[3];\ +- for(; i < size; i+=bpp) {\ ++ for(; i <= size - bpp; i+=bpp) {\ + dst[i+0] = r = op(r, src[i+0], last[i+0]);\ + if(bpp == 1) continue;\ + dst[i+1] = g = op(g, src[i+1], last[i+1]);\ +@@ -206,13 +206,9 @@ void ff_add_png_paeth_prediction(uint8_t *dst, uint8_t *src, uint8_t *top, int w + else if(bpp == 2) UNROLL1(2, op)\ + else if(bpp == 3) UNROLL1(3, op)\ + else if(bpp == 4) UNROLL1(4, op)\ +- else {\ +- for (; i < size; i += bpp) {\ +- int j;\ +- for (j = 0; j < bpp; j++)\ +- dst[i+j] = op(dst[i+j-bpp], src[i+j], last[i+j]);\ +- }\ +- } ++ for (; i < size; i++) {\ ++ dst[i] = op(dst[i-bpp], src[i], last[i]);\ ++ }\ + + /* NOTE: 'dst' can be equal to 'last' */ + static void png_filter_row(PNGDSPContext *dsp, uint8_t *dst, int filter_type, +-- +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 b4fc8c7..98f8103 100644 --- a/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb +++ b/meta/recipes-multimedia/gstreamer/gst-ffmpeg_0.10.13.bb @@ -37,6 +37,7 @@ SRC_URI = "http://gstreamer.freedesktop.org/src/${BPN}/${BPN}-${PV}.tar.bz2 \ file://0001-h264-correct-ref-count-check-and-limit-fix-out-of-ar.patch \ file://0001-roqvideodec-check-dimensions-validity.patch \ file://0001-aacdec-check-channel-count.patch \ + file://0001-pngdec-filter-dont-access-out-of-array-elements-at-t.patch \ " SRC_URI[md5sum] = "7f5beacaf1312db2db30a026b36888c4" -- 1.7.10.4 -- _______________________________________________ Openembedded-core mailing list [email protected] http://lists.openembedded.org/mailman/listinfo/openembedded-core
