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TITLE:
SilverStripe File Renaming Security Issue

SECUNIA ADVISORY ID:
SA40095

VERIFY ADVISORY:
Secunia.com
http://secunia.com/advisories/40095/
Customer Area (Credentials Required)
https://ca.secunia.com/?page=viewadvisory&vuln_id=40095

RELEASE DATE:
2010-06-10

DISCUSS ADVISORY:
http://secunia.com/advisories/40095/#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/40095/

ONLY AVAILABLE IN CUSTOMER AREA:
 * Authentication Level
 * Report Reliability
 * Secunia PoC
 * Secunia Analysis
 * Systems Affected
 * Approve Distribution
 * Remediation Status
 * Secunia CVSS Score
 * CVSS

https://ca.secunia.com/?page=viewadvisory&vuln_id=40095

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:
A security issue has been reported in SilverStripe, which can be
exploited by malicious users to compromise a vulnerable system.

The security issue is caused due an error while renaming uploaded
files. This can be exploited to rename and assign an arbitrary
extension to a file.

Successful exploitation requires "Files & Images" permissions and
allows to execute arbitrary PHP code if support for .htaccess files
is disabled or the "AllowOverride" directive does not specify
"FileInfo".

The security issue is confirmed in version 2.4.0. Other versions may
also be affected.

SOLUTION:
Grant only trusted users "Files & Images" permissions.

PROVIDED AND/OR DISCOVERED BY:
John Leitch

ORIGINAL ADVISORY:
http://cross-site-scripting.blogspot.com/2010/06/silverstripe-cms-240-arbitrary-upload.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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About:
This Advisory was delivered by Secunia as a free service to help
private users keeping their systems up to date against the latest
vulnerabilities.

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Definitions: (Criticality, Where etc.)
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Please Note:
Secunia recommends that you verify all advisories you receive by
clicking the link.
Secunia NEVER sends attached files with advisories.
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