XMLRPC.iPIMethods Vulnerability

Posted by Shugo Maeda on 1 Jul 2005

On Fri Jun 17 2005, a vulnerability of XMLRPC.iPIMethods was reported in [ruby-core:05237]. Remote attackers can execute arbitrary commands by this vulnerability.

Affected Programs

Programs providing XML-RPC services by XMLRPC.iPIMethods are affected.

Fix

This vulnerability was already fixed in both the CVS HEAD and the ruby_1_8 branch.

Please apply this patch for ruby-1.8.2.

• www.ruby-lang.org/patches/ruby-1.8.2-xmlrpc-ipimethods-fix.diff

--- ruby-1.8.2/lib/xmlrpc/utils.rb.orig 2003-08-15 02:20:14.000000000 +0900
+++ ruby-1.8.2/lib/xmlrpc/utils.rb      2005-07-01 16:33:19.243521736 +0900
@@ -138,7 +138,7 @@
 
     def get_methods(obj, delim=".")
       prefix = @prefix + delim
-      obj.class.public_instance_methods.collect { |name|
+      obj.class.public_instance_methods(false).collect { |name|
         [prefix + name, obj.method(name).to_proc, nil, nil] 
       }
     end