The EPSF pipe support in enscript 1.6.3 allows remote attackers or local users to execute arbitrary commands via shell metacharacters.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9658
https://exchange.xforce.ibmcloud.com/vulnerabilities/19012
http://www.vupen.com/english/advisories/2009/1297
http://www.us-cert.gov/cas/techalerts/TA09-133A.html
http://www.securityfocus.com/bid/12329
http://www.securityfocus.com/archive/1/435199/100/0/threaded
http://www.securityfocus.com/archive/1/419768/100/0/threaded
http://www.redhat.com/support/errata/RHSA-2005-040.html
http://www.mandriva.com/security/advisories?name=MDKSA-2005:033
http://www.gentoo.org/security/en/glsa/glsa-200502-03.xml
http://www.debian.org/security/2005/dsa-654
http://support.apple.com/kb/HT3549
http://securitytracker.com/id?1012965
http://secunia.com/advisories/35074
http://lists.apple.com/archives/security-announce/2009/May/msg00002.html