The convert-fcrontab program in fcron 3.0.0 might allow local users to gain privileges via a long command-line argument, which causes Linux glibc to report heap memory corruption, possibly because a strcpy in the strdup2 function can "overwrite some data."
https://exchange.xforce.ibmcloud.com/vulnerabilities/24444
https://bugs.trustix.org/show_bug.cgi?id=1754
http://www.vupen.com/english/advisories/2006/0435
http://www.trustix.org/errata/2006/0036
http://www.securityfocus.com/bid/16467
http://www.securityfocus.com/archive/1/423697/100/0/threaded
http://secunia.com/advisories/18719
http://fcron.free.fr/news.php#a20060206a.xml
http://fcron.free.fr/doc/en/changes.html
http://archives.neohapsis.com/archives/fulldisclosure/2006-01/0999.html