PALS Library System pals-cgi program allows remote attackers to execute arbitrary commands via shell metacharacters in the documentName parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/6102
https://euvd.enisa.europa.eu/vulnerability/EUVD-2001-0216
http://www.securityfocus.com/bid/2372
http://archives.neohapsis.com/archives/bugtraq/2001-02/0220.html