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CYBSEC Advisory#2010-0604 InterScan Web Security 5.0 Local Privilege Escalation
From: "Cybsec - Security Systems" <capacitacion () cybsec com>
Date: Wed, 23 Jun 2010 11:37:49 -0300

Advisory Name: Local Privilege Escalation in InterScan Web Security Virtual Apliance 5.0


Internal Cybsec Advisory Id: 2010-0604


Vulnerability Class: Local Privilege Escalation


Release Date: 22-06-2010


Affected Applications: InterScan Web Security Virtual Aplliance 5.0. Other versions may be affected 


Affected Platforms: Red Hat nash 5.1


Local / Remote: Local 


Severity:  Medium - CVSS: 6.8 (AV:L/AC:L/Au:S/C:C/I:C/A:C)


Researcher: Ivan Huertas 


Vendor Status: Patched


Reference to Vulnerability Disclosure Policy: http://www.cybsec.com/vulnerability_policy.pdf


Vulnerability Description: 


InterScan Web Security Virtual Appliance has a shell called "uihelper" that has suid bit on. So it could be possible to 
execute commands as root. Also using the vulnerability "Arbitrary File Upload" remote  commands could be run as root. 




* In order to run commands as root:


$/usr/iwss/AdminUi/uihelper whoami




Any user, can escalate privileges and execute arbitrary commands with root user rights. 




Apply the patch that can be found in 



Vendor Response:


2009-03-26 - Vulnerability was identified

2010-04-09 - Vendor contacted

2010-04-15 - Vendor response

2010-06-21 - Vendor released fixed version

2010-06-22 - Vulnerability published


Contact Information:


For more information regarding the vulnerability feel free to contact the researcher at 

ihuertas <at> cybsec <dot> com



About CYBSEC S.A. Security Systems 


Since 1996 CYBSEC S.A. is devoted exclusively to provide professional services specialized in Computer Security. More 
than 150 clients around the globe validate our quality and professionalism. 


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Our services are strictly focused on Information Security, protecting our clients from emerging security threats, 
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