Xen 3.0.3 pygrub TOOLS/PYGRUB/SRC/GRUBCONF.PY Local Command Injection Vulnerability

2014-07-01T00:00:00
ID SSV:83995
Type seebug
Reporter Root
Modified 2014-07-01T00:00:00

Description

No description provided by source.

                                        
                                            
                                                source: http://www.securityfocus.com/bid/25825/info

Xen is prone to a local command-injection vulnerability that can lead to privilege escalation.

This issue occurs because the application fails to validate input in the 'tools/pygrub/src/GrubConf.py' script.

This vulnerability affects Xen 3.0.3; other versions may be affected as well. 

An attacker can exploit this issue by including Python commands in a configuration file using filesystem utilities. The following proof of concept is available:

Change the 'default' statement in grub.conf to:
default "+str(0*os.system(" insert evil command here "))+"