diff options
| author | canyonknight <canyonknight@gmail.com> | 2012-06-23 14:40:11 -0400 |
|---|---|---|
| committer | Lukas Fleischer <archlinux@cryptocrack.de> | 2012-06-24 10:59:23 +0200 |
| commit | 2c93f0a98f0f6380fd07ea17fd16afa2c6e4925b (patch) | |
| tree | dc5fd78a8cb46cd1475b45eeaa6544fbdeb23280 /web/html/addvote.php | |
| parent | bfb25807c49d3f35cdce91947a442455e1940392 (diff) | |
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>
Diffstat (limited to 'web/html/addvote.php')
| -rw-r--r-- | web/html/addvote.php | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/web/html/addvote.php b/web/html/addvote.php index f0e7d31..a5ec4a1 100644 --- a/web/html/addvote.php +++ b/web/html/addvote.php @@ -16,7 +16,11 @@ if (isset($_COOKIE["AURSID"])) { if ($atype == "Trusted User" OR $atype == "Developer") { $dbh = db_connect(); - if (!empty($_POST['addVote'])) { + if (!empty($_POST['addVote']) && !check_token()) { + $error = __("Invalid token for user action."); + } + + if (!empty($_POST['addVote']) && check_token()) { $error = ""; if (!empty($_POST['user'])) { @@ -99,6 +103,7 @@ if ($atype == "Trusted User" OR $atype == "Developer") { <b><?php print __('Proposal') ?></b><br /> <textarea name='agenda' rows='25' cols='80'><?php if (!empty($_POST['agenda'])) { print htmlentities($_POST['agenda']); } ?></textarea><br /> <input type='hidden' name='addVote' value='1' /> +<input type='hidden' name='token' value='<?php print htmlspecialchars($_COOKIE['AURSID']) ?>' /> <input type='submit' class='button' value='<?php print __('Submit'); ?>' /> </p> </form> |