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2003: 2,700 advisories published
2004: 3,100 advisories published
2005: 4,600 advisories published
2006: 5,300 advisories published

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TITLE:
WordPress Cookies Security Bypass Weakness

SECUNIA ADVISORY ID:
SA27714

VERIFY ADVISORY:
http://secunia.com/advisories/27714/

CRITICAL:
Not critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
Wordpress 1.x
http://secunia.com/product/3978/
WordPress 2.x
http://secunia.com/product/6745/

DESCRIPTION:
Steven J. Murdoch has discovered a weakness in WordPress, which can
be exploited by malicious people to bypass certain security
restrictions.

The weakness is caused due to the fact that it is possible to
construct the two authentication cookies ("wordpressuser_*" and
"wordpresspass_*") from the data in the "users" table.

Successful exploitation allows e.g. logging in as administrator, but
requires read access to the "users" table of the database.

NOTE: The weakness is reportedly being exploited in the wild.

The weakness is confirmed in version 2.3.1 and reported in all
previous versions down to and including 1.5.

SOLUTION:
Grant only trusted users read access to the "users" table.

Restrict access to the "wp-admin" directory (e.g. with ".htaccess").

PROVIDED AND/OR DISCOVERED BY:
Steven J. Murdoch

ORIGINAL ADVISORY:
http://www.cl.cam.ac.uk/~sjm217/advisories/wordpress-cookie-auth.txt

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About:
This Advisory was delivered by Secunia as a free service to help
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