Mozilla: Out-of-bounds read in ConvolvePixel (MFSA 2017-11, MFSA 2017-12)

An out-of-bounds read while processing SVG content in "ConvolvePixel". This results in a crash and also allows for otherwise inaccessible memory being copied into SVG graphic content, which could then displayed. This vulnerability affects Thunderbird 52.1, Firefox ESR 45.9, Firefox ESR 52.1, and...