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login.php: Escape quotes in the referer field

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Replace special characters in the referer GET parameter using
htmlspecialchars() before inserting it into the login form fields to
prevent from XSS attacks.

Fixes FS#55286.

Signed-off-by: Lukas Fleischer <lfleischer@archlinux.org>
This commit is contained in:
Lukas Fleischer 2017-11-05 11:27:36 +01:00
parent 4efba18f86
commit e2fa5ea6fa
1 changed files with 1 additions and 1 deletions
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2
web/html/login.php
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@ -41,7 +41,7 @@ html_header('AUR ' . __("Login"));
<input type="submit" class="button" value="<?php print __("Login"); ?>" />
<a href="<?= get_uri('/passreset/') ?>">[<?= __('Forgot Password') ?>]</a>
<?php if (in_request('referer') !== ""): ?>
<input id="id_referer" type="hidden" name="referer" value="<?= in_request('referer') ?>" />
<input id="id_referer" type="hidden" name="referer" value="<?= htmlspecialchars(in_request('referer'), ENT_QUOTES) ?>" />
<?php elseif (isset($_SERVER['HTTP_REFERER'])): ?>
<input id="id_referer" type="hidden" name="referer" value="<?= htmlspecialchars($_SERVER['HTTP_REFERER'], ENT_QUOTES) ?>" />
<?php endif; ?>