In ImageMagick 7.0.7-23 Q16 x86_64 2018-01-24, there is a heap-based buffer over-read in ReadSUNImage in coders/sun.c, which allows attackers to cause a denial of service (application crash in SetGrayscaleImage in MagickCore/quantize.c) via a crafted SUN image file.
{
"versions": [
{
"introduced": "7.0.7-16"
},
{
"fixed": "7.0.7-21"
},
{
"introduced": "0"
},
{
"last_affected": "7.0.7-23"
}
]
}