From 2c93f0a98f0f6380fd07ea17fd16afa2c6e4925b Mon Sep 17 00:00:00 2001 From: canyonknight 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 Signed-off-by: Lukas Fleischer --- web/html/pkgsubmit.php | 14 +++++++++++--- 1 file changed, 11 insertions(+), 3 deletions(-) (limited to 'web/html/pkgsubmit.php') diff --git a/web/html/pkgsubmit.php b/web/html/pkgsubmit.php index 539f056..c566cb4 100644 --- a/web/html/pkgsubmit.php +++ b/web/html/pkgsubmit.php @@ -27,9 +27,16 @@ if ($uid): if (isset($_REQUEST['pkgsubmit'])) { + # Make sure authenticated user submitted the package themselves + if (!check_token()) { + $error = __("Invalid token for user action."); + } + # Before processing, make sure we even have a file - if ($_FILES['pfile']['size'] == 0){ - $error = __("Error - No file uploaded"); + if (!$error) { + if ($_FILES['pfile']['size'] == 0){ + $error = __("Error - No file uploaded"); + } } # Check whether the file is gzip'ed @@ -448,7 +455,8 @@ html_header("Submit"); ?>
-
+
+ ' />
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