CVE-2009-4024
Argument injection vulnerability in the ping function in Ping.php in the Net_Ping package before 2.4.5 for PEAR allows remote attackers to execute arbitrary shell commands via the host parameter. NOTE: this has also been reported as a shell metacharacter problem.
Date published : 2009-11-28
http://www.securityfocus.com/bid/37093
http://blog.pear.php.net/2009/11/14/net_traceroute-and-net_ping-security-advisory/