ping.php in Global Console Manager 16 (GCM16) and Global Console Manager 32 (GCM32) before 1.20.0.22575 on the IBM Avocent 1754 KVM switch allows remote authenticated users to execute arbitrary commands via shell metacharacters in the (1) count or (2) size parameter.
https://exchange.xforce.ibmcloud.com/vulnerabilities/85367
http://www.ibm.com/support/entry/portal/docdisplay?lndocid=MIGR-5093509
http://www.bitcloud.es/2013/08/vulnerabilidad-en-kvms-gcm1632-de-ibm.html