In ImageMagick 7.0.6-8, the WritePDFImage function in coders/pdf.c operates on an incorrect data structure in the dump uncompressed PseudoColor packets step, which allows attackers to cause a denial of service (assertion failure in WriteBlobStream in MagickCore/blob.c) via a crafted file. https://nvd.nist.gov/vuln/detail/CVE-2017-13132