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Implement token system to fix CSRF vulnerabilities

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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>
This commit is contained in:
canyonknight 2012-06-23 14:40:11 -04:00 • committed by Lukas Fleischer
parent bfb25807c4
commit 2c93f0a98f
13 changed files with 82 additions and 46 deletions
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1
web/template/pkg_search_results.php
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@ -114,6 +114,7 @@ for ($i = 0; $row = mysql_fetch_assoc($result); $i++) {
<input type='text' id='merge_Into' name='merge_Into' />
<input type='checkbox' name='confirm_Delete' value='1' /> <?php print __("Confirm") ?>
<?php endif; ?>
<input type='hidden' name='token' value='<?php print htmlspecialchars($_COOKIE['AURSID']) ?>' />
<input type='submit' class='button' style='width: 80px' value='<?php print __("Go") ?>' />
</div>
<?php endif; # if ($SID) ?>