Secunia Security Advisory - Alexander Concha has reported a vulnerability in WordPress MU, which can be exploited by malicious users to bypass certain security restrictions and to compromise a vulnerable system.
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TITLE:
WordPress MU File Upload and Security Bypass
SECUNIA ADVISORY ID:
SA28789
VERIFY ADVISORY:
http://secunia.com/advisories/28789/
CRITICAL:
Moderately critical
IMPACT:
Security Bypass, System access
WHERE:
>From remote
SOFTWARE:
WordPress MU 1.x
http://secunia.com/product/14628/
DESCRIPTION:
Alexander Concha has reported a vulnerability in WordPress MU, which
can be exploited by malicious users to bypass certain security
restrictions and to compromise a vulnerable system.
The wp-admin/options.php script does not properly restrict changes to
options. This can be exploited to e.g. upload and execute arbitrary
PHP code.
Successful exploitation requires valid user credentials and having
"manage_options" capabilities. Successful exploitation for file
uploading also requires "upload_files" capabilities.
The vulnerability is reported in version 1.3.1. Prior versions may
also be affected.
SOLUTION:
Update to version 1.3.2 or later.
PROVIDED AND/OR DISCOVERED BY:
Alexander Concha
ORIGINAL ADVISORY:
WordPress MU:
http://mu.wordpress.org/forums/topic.php?id=7534&page&replies=1
Alexander Concha:
http://www.buayacorp.com/files/wordpress/wordpress-mu-options-overwrite.html
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