In the function ReadTXTImage() in coders/txt.c in ImageMagick 7.0.6-10, an integer overflow might occur for the addition operation GetQuantumRange(depth)+1 when depth is large, producing a smaller value than expected. As a result, an infinite loop would occur for a crafted TXT file that claims a very large max_value value. https://nvd.nist.gov/vuln/detail/CVE-2017-14173
