Prevent from easily taking over an account by changing the password with
a stolen session ID.

Fixes FS#65325.

Signed-off-by: Lukas Fleischer <lfleisc...@archlinux.org>
---
 web/html/account.php               |  1 +
 web/html/register.php              |  2 ++
 web/lib/acctfuncs.inc.php          | 15 ++++++++++++--
 web/template/account_edit_form.php | 32 +++++++++++++++++++-----------
 4 files changed, 36 insertions(+), 14 deletions(-)

diff --git a/web/html/account.php b/web/html/account.php
index 1d59e9c..7c6c424 100644
--- a/web/html/account.php
+++ b/web/html/account.php
@@ -34,6 +34,7 @@ if ($action == "UpdateAccount") {
                        in_request("S"),
                        in_request("E"),
                        in_request("H"),
+                       in_request("PO"),
                        in_request("P"),
                        in_request("C"),
                        in_request("R"),
diff --git a/web/html/register.php b/web/html/register.php
index a426482..8174e34 100644
--- a/web/html/register.php
+++ b/web/html/register.php
@@ -26,6 +26,7 @@ if (in_request("Action") == "NewAccount") {
                in_request("H"),
                '',
                '',
+               '',
                in_request("R"),
                in_request("L"),
                in_request("TZ"),
@@ -54,6 +55,7 @@ if (in_request("Action") == "NewAccount") {
                        in_request("H"),
                        '',
                        '',
+                       '',
                        in_request("R"),
                        in_request("L"),
                        in_request("TZ"),
diff --git a/web/lib/acctfuncs.inc.php b/web/lib/acctfuncs.inc.php
index e754989..1de49b0 100644
--- a/web/lib/acctfuncs.inc.php
+++ b/web/lib/acctfuncs.inc.php
@@ -96,6 +96,7 @@ function 
display_account_form($A,$U="",$T="",$S="",$E="",$H="",$P="",$C="",$R=""
  * @param string $S Whether or not the account is suspended
  * @param string $E The e-mail address for the user
  * @param string $H Whether or not the e-mail address should be hidden
+ * @param string $PO The old password of the user
  * @param string $P The password for the user
  * @param string $C The confirmed password for the user
  * @param string $R The real name of the user
@@ -116,7 +117,7 @@ function 
display_account_form($A,$U="",$T="",$S="",$E="",$H="",$P="",$C="",$R=""
  *
  * @return array Boolean indicating success and message to be printed
  */
-function 
process_account_form($TYPE,$A,$U="",$T="",$S="",$E="",$H="",$P="",$C="",
+function 
process_account_form($TYPE,$A,$U="",$T="",$S="",$E="",$H="",$PO="",$P="",$C="",
                
$R="",$L="",$TZ="",$HP="",$I="",$K="",$PK="",$J="",$CN="",$UN="",$ON="",$UID=0,$N="",$captcha_salt="",$captcha="")
 {
        global $SUPPORTED_LANGS;
 
@@ -134,6 +135,7 @@ function 
process_account_form($TYPE,$A,$U="",$T="",$S="",$E="",$H="",$P="",$C=""
 
        if(isset($_COOKIE['AURSID'])) {
                $editor_user = uid_from_sid($_COOKIE['AURSID']);
+       $row = account_details(in_request("ID"), in_request("U"));
        }
        else {
                $editor_user = null;
@@ -159,9 +161,18 @@ function 
process_account_form($TYPE,$A,$U="",$T="",$S="",$E="",$H="",$P="",$C=""
                        . "</li>\n</ul>";
        }
 
-       if (!$error && $P && $C && ($P != $C)) {
+       if (!$error && $P && !$C) {
+               $error = __("Please confirm your new password.");
+       }
+       if (!$error && $P && !$PO) {
+               $error = __("Please enter your old password in order to set a 
new one.");
+       }
+       if (!$error && $P && $P != $C) {
                $error = __("Password fields do not match.");
        }
+       if (!$error && $P && check_passwd($UID, $PO) != 1) {
+               $error = __("The old password is invalid.");
+       }
        if (!$error && $P != '' && !good_passwd($P)) {
                $length_min = config_get_int('options', 'passwd_min_len');
                $error = __("Your password must be at least %s characters.",
diff --git a/web/template/account_edit_form.php 
b/web/template/account_edit_form.php
index 5e84aa7..25e9185 100644
--- a/web/template/account_edit_form.php
+++ b/web/template/account_edit_form.php
@@ -86,18 +86,6 @@
                        <input type="checkbox" name="H" id="id_hide" <?= $H ? 
'checked="checked"' : '' ?> />
                </p>
 
-               <?php if ($A == "UpdateAccount"): ?>
-               <p>
-                       <label for="id_passwd1"><?= __("Password") ?>:</label>
-                       <input type="password" size="30" name="P" 
id="id_passwd1" value="<?= $P ?>" />
-               </p>
-
-               <p>
-                       <label for="id_passwd2"><?= __("Re-type password") 
?>:</label>
-                       <input type="password" size="30" name="C" 
id="id_passwd2" value="<?= $C ?>" />
-               </p>
-               <?php endif; ?>
-
                <p>
                        <label for="id_realname"><?= __("Real Name") ?>:</label>
                        <input type="text" size="30" maxlength="32" name="R" 
id="id_realname" value="<?= htmlspecialchars($R,ENT_QUOTES) ?>" />
@@ -150,6 +138,26 @@
                </p>
        </fieldset>
 
+       <?php if ($A == "UpdateAccount"): ?>
+       <fieldset>
+               <legend><?= __("If you want to change your password, enter your 
current passport, your new password and confirm the new password by entering it 
again.") ?></legend>
+               <p>
+                       <label for="id_passwd_old"><?= __("Old password") 
?>:</label>
+                       <input type="password" size="30" name="PO" 
id="id_passwd_old" value="<?= $PO ?>" />
+               </p>
+
+               <p>
+                       <label for="id_passwd1"><?= __("Password") ?>:</label>
+                       <input type="password" size="30" name="P" 
id="id_passwd1" value="<?= $P ?>" />
+               </p>
+
+               <p>
+                       <label for="id_passwd2"><?= __("Re-type password") 
?>:</label>
+                       <input type="password" size="30" name="C" 
id="id_passwd2" value="<?= $C ?>" />
+               </p>
+       </fieldset>
+       <?php endif; ?>
+
        <fieldset>
                <legend><?= __("The following information is only required if 
you want to submit packages to the Arch User Repository.") ?></legend>
                <p>
-- 
2.25.0

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