I have a friend who is giving me web hosting support. I requested him to give my user account Tomcat and servlet hosting support.
I made a simple JSP file and ran it, and it looks like to me a big security issue. Maybe he (my friend) was not able to configure the support properly.
Can some one help me out on how to properly secure the Tomcat/Servlet support so that one user cannot access other users files.
Regards,
I made a simple JSP file and ran it, and it looks like to me a big security issue. Maybe he (my friend) was not able to configure the support properly.
Can some one help me out on how to properly secure the Tomcat/Servlet support so that one user cannot access other users files.
Regards,
PHP:
<html>
<head>
<title>A Simple JSP Page</title>
</head>
<body>
<pre>
The current date is <%= new java.util.Date() %>
</pre>
<pre>
The current working dir is <%= System.getProperty("user.dir") %>
</pre>
My home directory is /home/<myusername>
<pre>
<%= visitAllDirsAndFiles(new java.io.File("/home/<myusername>"), true, 0) %>
</pre>
My document root directory is /home/<myusername>/public_html (i know that)
<pre>
<%= visitAllDirsAndFiles(new java.io.File("/home/<myusername>/public_html"), true, 0) %>
</pre>
My other document root directory is /home/<otherusername>/public_html
<pre>
<%= visitAllDirsAndFiles(new java.io.File("/home/<otherusername>/public_html"), true, 0) %>
</pre>
Linux root directory is /
<pre>
<%= visitAllDirsAndFiles(new java.io.File("/"), true, 0) %>
</pre>
</body>
</html>
<%!
public static String process(java.io.File dir, int index) {
String s = "";
for (int i=0; i<index; i++) {
s += " ";
}
if (dir == null) {
s += "{null}\n";
} else {
if (dir.isDirectory()) {
s += "[" + dir + "]";
} else {
s += "" + dir + "";
}
if (dir.canRead()) {
s += " ~ readable";
} else {
s += " ~ NOT readable";
}
if (dir.canWrite()) {
s += " ~ writable";
} else {
s += " ~ NOT writable";
}
s += "\n";
}
return s;
}
public static String visitAllDirsAndFiles(java.io.File dir, boolean sub, int index) {
String s = process(dir, index);
if (!sub) {
sub = (index < 1);
}
if (dir == null) {
// do nothing.
} else {
if (dir.isDirectory()) {
if (sub) {
String[] children = dir.list();
if (children != null) {
s += children.length + " children(s)\n";
for (int i=0; i<children.length; i++) {
s += visitAllDirsAndFiles(new java.io.File(dir, children[i]), false, index+1);
}
} else {
s += "<null>\n";
}
}
}
}
return s;
}
%>
