The OpenBlob function in blob.c in GraphicsMagick before 1.3.24 and ImageMagick allows remote attackers to execute arbitrary code via a | (pipe) character at the start of a filename.
git.imagemagick.org/repos/ImageMagick/commit/40639d173aa8c76b850d625c630b711fee4dcfb8
hg.code.sf.net/p/graphicsmagick/code/file/41876934e762/ChangeLog
hg.code.sf.net/p/graphicsmagick/code/rev/ae3928faa858
lists.opensuse.org/opensuse-security-announce/2016-06/msg00008.html
lists.opensuse.org/opensuse-security-announce/2016-06/msg00009.html
lists.opensuse.org/opensuse-security-announce/2016-06/msg00011.html
lists.opensuse.org/opensuse-security-announce/2016-06/msg00021.html
lists.opensuse.org/opensuse-security-announce/2016-06/msg00030.html
lists.opensuse.org/opensuse-security-announce/2016-06/msg00032.html
lists.opensuse.org/opensuse-security-announce/2016-06/msg00047.html
www.debian.org/security/2016/dsa-3591
www.debian.org/security/2016/dsa-3746
www.openwall.com/lists/oss-security/2016/05/29/7
www.openwall.com/lists/oss-security/2016/05/30/1
www.oracle.com/technetwork/topics/security/bulletinjul2016-3090568.html
www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.html
www.securityfocus.com/bid/90938
www.securitytracker.com/id/1035984
www.securitytracker.com/id/1035985
www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.397749
www.ubuntu.com/usn/USN-2990-1
access.redhat.com/errata/RHSA-2016:1237