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Elcom Community Manager 7.4.10 Shell Upload

Elcom Community Manager 7.4.10 Shell Upload
Posted Aug 25, 2012
Authored by Phil Taylor | Site senseofsecurity.com.au

Elcom Community Manager versions 7.4.10 from Elcom CMS suffers from a remote shell upload vulnerability.

tags | exploit, remote, shell
MD5 | 0a6a5af809a98ba6efe8dbc3032a685d

Elcom Community Manager 7.4.10 Shell Upload

Change Mirror Download
Elcom CMS - Community Manager Insecure File Upload Vulnerability - Security 
Advisory - SOS-12-008


Release Date. 24-Aug-2012
Last Update. -
Vendor Notification Date. 28-Oct-2011
Product. Elcom CMS - Community Manager
Platform. ASP.NET
Affected versions. Elcom Community Manager version 7.4.10 and
possibly others
Severity Rating. High
Impact. Exposure of system information
Exposure of sensitive information
System Access
Attack Vector. Remote with authentication
Solution Status. Fixed in version 7.5 and later (not verified by
SOS)
CVE reference. CVE - not yet assigned

Details.
The https://[server]/UploadStyleSheet.aspx script does not validate the file
type passed in the parameter "myfile0" on the server side allowing the
uploading and execution of ASPX files. An attacker can upload an ASPX web
shell and execute commands with web server user privileges.

Proof of Concept (port scanning).
A shell uploaded using the vulnerable
(https://[server]/UploadStyleSheet.aspx) script can be accessed at the
following location: https://[server]/UserUploadedStyles/shell.aspx

Solution.
Upgrade to version 7.5 or later.

Discovered by.
Phil Taylor and Nadeem Salim from Sense of Security Labs.

About us.
Sense of Security is a leading provider of information security and
risk management solutions. Our team has expert skills in assessment
and assurance, strategy and architecture, and deployment through to
ongoing management. We are Australia's premier application penetration
testing firm and trusted IT security advisor to many of the country's
largest organisations.

Sense of Security Pty Ltd
Level 8, 66 King St
Sydney NSW 2000
AUSTRALIA

T: +61 (0)2 9290 4444
F: +61 (0)2 9290 4455
W: http://www.senseofsecurity.com.au/consulting/penetration-testing
E: info@senseofsecurity.com.au
Twitter: @ITsecurityAU

The latest version of this advisory can be found at:
http://www.senseofsecurity.com.au/advisories/SOS-12-008.pdf

Other Sense of Security advisories can be found at:
http://www.senseofsecurity.com.au/research/it-security-advisories.php

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