TITLE:
WordPress PHP Code Injection Vulnerability

SECUNIA ADVISORY ID:
SA20271

VERIFY ADVISORY:
http://secunia.com/advisories/20271/

CRITICAL:
Moderately critical

IMPACT:
System access

WHERE:
>From remote

SOFTWARE:
WordPress 2.x
http://secunia.com/product/6745/

DESCRIPTION:
rgod has discovered a vulnerability in WordPress, which can be
exploited by malicious users to compromise a vulnerable system.

Input passed to various fields when registering or updating the user
profile isn't properly sanitised before being stored in PHP scripts
in the wp-content/cache/userlogins/ and wp-content/cache/users/
directories inside the web root. This can be exploited to inject and
execute arbitrary PHP code via the newline character.

It is also possible to supply a spoofed IP address when registering
by setting the "PC_REMOTE_ADDR" HTTP header.

The vulnerability has been confirmed in version 2.0.2. Other versions
may also be affected.

SOLUTION:
Restrict web access to the wp-content/cache/userlogins/ and
wp-content/cache/users/ directories (e.g. with a .htaccess file).

PROVIDED AND/OR DISCOVERED BY:
rgod

ORIGINAL ADVISORY:
http://retrogod.altervista.org/wordpress_202_xpl.html

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