lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Mon, 16 Apr 2012 13:11:55 -0600
From: Kurt Seifried <kseifried@...hat.com>
To: MustLive <mustlive@...security.com.ua>
Cc: full-disclosure@...ts.grok.org.uk, submissions@...ketstormsecurity.org
Subject: Re: DoS vulnerability in WordPress

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

On 04/15/2012 02:55 PM, MustLive wrote:
> DoS (WASC-10):
> 
> By constantly sending requests to script 
> http://site/wp-admin/maint/repair.php (functions "Repair Database"
> and "Repair and Optimize Database") it's possible to create
> overload at the site (and the whole server). And the more data in
> site's DB, the more load from every request.
> 
> http://site/wp-admin/maint/repair.php?repair=1&_wpnonce=a4ca36d5ff
> 
> http://site/wp-admin/maint/repair.php?repair=2&_wpnonce=a4ca36d5ff
> 
> The attack will work at turned on WP_ALLOW_REPAIR in
> wp-config.php. Protection against CSRF (tokens) is bypassing,
> because for using of this functionality the authorization isn't
> required. So it's possible to get _wpnonce remotely and to conduct
> DoS attack.

This appears to be intended functionality, by default I get:

"To allow use of this page to automatically repair database problems,
please add the following line to your wp-config.php file. Once this
line is added to your config, reload this page.
define('WP_ALLOW_REPAIR', true);"

So either an admin has to specifically configure this to allow it
anonymously, or exploitation requires administrative access. I don't
see any trust boundary being violated here.


- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
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=yegM
-----END PGP SIGNATURE-----

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.grok.org.uk/full-disclosure-charter.html
Hosted and sponsored by Secunia - http://secunia.com/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux - Powered by OpenVZ