From 2c93f0a98f0f6380fd07ea17fd16afa2c6e4925b Mon Sep 17 00:00:00 2001
From: canyonknight <canyonknight@gmail.com>
Date: Sat, 23 Jun 2012 14:40:11 -0400
Subject: Implement token system to fix CSRF vulnerabilities

Specially crafted pages can force authenticated users to unknowingly perform
actions on the AUR website despite being on an attacker's website. This
cross-site request forgery (CSRF) vulnerability applies to all POST data on
the AUR.

Implement a token system using a double submit cookie. Have a hidden form
value on every page containing POST forms. Use the newly added check_token() to
verify the token sent via POST matches the "AURSID" cookie value. Random
nature of the token limits potential for CSRF.

Signed-off-by: canyonknight <canyonknight@gmail.com>
Signed-off-by: Lukas Fleischer <archlinux@cryptocrack.de>
---
 web/template/pkg_comments.php | 1 +
 1 file changed, 1 insertion(+)

(limited to 'web/template/pkg_comments.php')

diff --git a/web/template/pkg_comments.php b/web/template/pkg_comments.php
index aed9ca8b..9dd50041 100644
--- a/web/template/pkg_comments.php
+++ b/web/template/pkg_comments.php
@@ -15,6 +15,7 @@ while (list($indx, $carr) = each($comments)) { ?>
 		$durl.= '<fieldset style="display:inline;">';
 		$durl.= '<input type="hidden" name="action" value="do_DeleteComment" />';
 		$durl.= '<input type="hidden" name="comment_id" value="'.$carr['ID'].'" />';
+		$durl.= '<input type="hidden" name="token" value="'.htmlspecialchars($_COOKIE['AURSID']).'" />';
 		$durl.= '<input type="image" src="images/x.png" ';
 		$durl.= ' alt="'.__("Delete comment").'" name="submit" value="1" ';
 		$durl.= ' />&nbsp;';
-- 
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