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TITLE:
Feng Office Community Edition Cross-Site Scripting and Arbitrary File
Upload

SECUNIA ADVISORY ID:
SA43912

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/43912/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=43912

RELEASE DATE:
2011-03-28

DISCUSS ADVISORY:
http://secunia.com/advisories/43912/#comments

AVAILABLE ON SITE AND IN CUSTOMER AREA:
 * Last Update
 * Popularity
 * Comments
 * Criticality Level
 * Impact
 * Where
 * Solution Status
 * Operating System / Software
 * CVE Reference(s)

http://secunia.com/advisories/43912/

ONLY AVAILABLE IN CUSTOMER AREA:
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 * Secunia Analysis
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https://ca.secunia.com/?page=viewadvisory&vuln_id=43912

ONLY AVAILABLE WITH SECUNIA CSI AND SECUNIA PSI:
 * AUTOMATED SCANNING

http://secunia.com/vulnerability_scanning/personal/
http://secunia.com/vulnerability_scanning/corporate/wsus_sccm_3rd_third_party_patching/

DESCRIPTION:
John Leitch has discovered multiple vulnerabilities in Feng Office
Community Edition, which can be exploited by malicious people to
conduct cross-site scripting attacks and compromise a vulnerable
system.

1) Input passed via the "filename" and "slimContent" POST parameters
to public/assets/javascript/slimey/save.php is not properly sanitised
before being returned to the user. This can be exploited to execute
arbitrary HTML and script code in a user's browser session in context
of an affected site.

2) The public/assets/javascript/ckeditor/ck_upload_handler.php script
does not properly validate uploaded files, which can be exploited to
upload files with arbitrary extensions.

Successful exploitation of this vulnerability allows the execution of
arbitrary PHP code, but requires knowledge of the generated file name
(e.g. via enabled directory listings).

The vulnerabilities are confirmed in version 1.7.4 Community Edition.
Other versions may also be affected.

SOLUTION:
Edit the source code to ensure that input is properly sanitised.
Restrict access to the
public/assets/javascript/ckeditor/ck_upload_handler.php (e.g. via
.htaccess) or disable directory listings.

PROVIDED AND/OR DISCOVERED BY:
John Leitch, AutoSec Tools.

ORIGINAL ADVISORY:
AutoSec Tools:
http://www.autosectools.com/Advisories/FengOffice.1.7.4_Reflected.Cross-site.Scripting_148.html
http://www.autosectools.com/Advisories/FengOffice.1.7.4_Arbitrary.Upload_149.html

OTHER REFERENCES:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

DEEP LINKS:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED DESCRIPTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXTENDED SOLUTION:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

EXPLOIT:
Further details available in Customer Area:
http://secunia.com/products/corporate/EVM/

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