Multiple stack-based buffer overflows in the jclient._Java_novell_jclient_JClient_defineClass@20 function in jclient.dll in the Tomcat web server in Novell iManager 2.7, 2.7.3, and 2.7.3 FTF2 allow remote authenticated users to execute arbitrary code via the (1) EnteredClassID or (2) NewClassName parameter to nps/servlet/webacc.