[NT] Gafware's CFXImage Showtemp Program File Reading Vulnerability

From: support@securiteam.com
Date: 05/29/02 

From: support@securiteam.com
To: list@securiteam.com
Date: Wed, 29 May 2002 23:44:17 +0200 (CEST)

The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com
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  Gafware's CFXImage Showtemp Program File Reading Vulnerability
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SUMMARY

 <http://www.gafware.com> CFXImage is a custom ColdFusion tag for editing
and creating images. A security vulnerability in the product allows
attackers to view the content of files residing outside the normally
bounding HTML root directory.

DETAILS

Vulnerable systems:
CFXImage versions 1.6.6 and prior

Showtemp.cfm is part of the CFXImage documentation, the showtemp.cfm
program does not filter its input variables allowing directory transversal
and reading of files outside the web root.

Exploit:
Showtemp can be exploited to read the boot.ini file in the following
manner :
http://www.server.com/docs/showtemp.cfm?TYPE=JPEG&FILE=c:\boot.ini
Or
http://www.server.com/docs/showtemp.cfm?TYPE=JPEG&FILE=../../../../../../../../../..boot.ini%00

Severity:
Anonymous attackers can read any files on the server, if the web service's
account has the appropriate rights to read the file.

Vendor Status:
Vendor has a patched version available.

Fix:
As policy, all sample programs and documentation should be removed from
production servers. Otherwise, upgrade to the latest version of CFXImage,
which fixes this vulnerability.

ADDITIONAL INFORMATION

The information has been provided by
<mailto:richard.brain@procheckup.com> Richard Brain.

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