McAfee VirusScan ASaP Lets Remote Users View Contents of Files on the Host
SecurityTracker Alert ID: 1001980|
SecurityTracker URL: http://securitytracker.com/id/1001980
(Links to External Site)
Date: Jul 12 2001
Disclosure of system information, Disclosure of user information|
Exploit Included: Yes |
Version(s): tested on NT Workstation 4.0, 2000 Professional|
McAfee's VirusScan ASaP anti-virus software for Windows reportedly contains a vulnerability that allows remote users to access and view files on the host.|
VirusScan ASaP reportedly uses peer-to-peer agent technology (called Rumor Technology) to distribute antivirus definitions from host to host. This agent software apparently includes a web server listening on port 6515 and designed to only serve files that are located in the \winnt\mycio\agent\rmrcache directory. The vulnerability allows remote users to use a specially crafted HTTP URL to obtain files located outside of the directory on the same drive that the anti-virus software is installed on. Because the web service runs in the Local system context, all files on the drive can be viewed.
For example, the following type of URL can be used:
The vendor has reportedly been notified.
A remote user can obtain any files located on the same drive that the anti-virus software is installed on.|
No solution was available at the time of this entry.|
Vendor URL: mycio.com/content/virusscan_asap/default.asp (Links to External Site)
Access control error, Input validation error|
|Underlying OS: Windows (Me), Windows (NT), Windows (95), Windows (98), Windows (2000)|
This archive entry has one or more follow-up message(s) listed below.|
Source Message Contents
Subject: McAfee ASaP Virusscan - myCIO HTTP Server Directory Traversal Vulnerabilty|
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-=[ SECURITY ADVISORY ]=-
McAfee ASaP Virusscan - myCIO HTTP Server Directory Traversal Vulnerabilty
Date: 28 June 2001
Affected: Any machine running the McAfee Agent ASaP VirusScan Software
Tested on: NT Workstation 4.0, 2000 Professional
McAfee ASap Virusscan is a Web-based, managed and updated Anti-Virus Service
for the Desktop Environment. On setup agent software is installed on the
client machine. This software incorporates what is known as "Rumour Technology"
that facilitates in the transfer of virus definitions between neigbouring
machines. This agent software runs as a service ("McAfee Agent") under
the local system account and uses a light weight HTTP server that listens
on port 6515.
This web server is restricted to serve files that are located under \winnt\mycio\agent\rmrcache
, however it is possible to break out of this by using a specially formatted
directory traversal URL. This means that an attacker can connect to the
webserver and view and/or download any file that resides on the target box.
Due to the fact that the service is running as local system NTFS permissions
To view the contents of WinNT/Repair enter the following URL into a web
HTTP://<Target IP Address>:6515/.../.../.../.../winnt/repair
Disable the McAfee Agent service or alternatively run it under a local user
account and set the NTFS permissions accordingly.
McAfee where notified of this issue 28-June-2001
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