ImageMagick is vulnerable to denial of service (DoS) attacks. Attackers can trigger a flaw in coders/tiff.c which allows them to cause a NULL pointer dereference, leading to a crash, using a malformed image file.
www.debian.org/security/2016/dsa-3726
www.openwall.com/lists/oss-security/2016/11/19/7
www.openwall.com/lists/oss-security/2016/11/23/4
www.securityfocus.com/bid/94489
blogs.gentoo.org/ago/2016/11/19/imagemagick-null-pointer-must-never-be-null-tiff-c/
github.com/asarubbo/poc/blob/master/00049-imagemagick-pointernerverbenull
github.com/ImageMagick/ImageMagick/commit/b61d35eaccc0a7ddeff8a1c3abfcd0a43ccf210b
github.com/ImageMagick/ImageMagick/issues/298
www.openwall.com/lists/oss-security/2016/11/23/4