From 2d792a108434d9ea59ebf75ae09fb69cbab6fb71 Mon Sep 17 00:00:00 2001
From: Frédéric Buclin <LpSolit@gmail.com>
Date: Wed, 28 Dec 2011 23:11:44 +0100
Subject: Bug 711714: (CVE-2011-3667) [SECURITY] The
 User.offer_account_by_email WebService method lets you create new user
 accounts independently of the value of
 Bugzilla::Auth::Verify::*::user_can_create_account r=glob a=LpSolit

---
 Bugzilla/User.pm                 | 37 +++++++++++++++++++++++++++++++++++++
 Bugzilla/WebService/Constants.pm |  1 +
 Bugzilla/WebService/User.pm      | 26 +++++++-------------------
 3 files changed, 45 insertions(+), 19 deletions(-)

(limited to 'Bugzilla')

diff --git a/Bugzilla/User.pm b/Bugzilla/User.pm
index ccb73cb66..5f430833b 100644
--- a/Bugzilla/User.pm
+++ b/Bugzilla/User.pm
@@ -1965,6 +1965,32 @@ sub is_available_username {
     return 1;
 }
 
+sub check_account_creation_enabled {
+    my $self = shift;
+
+    # If we're using e.g. LDAP for login, then we can't create a new account.
+    $self->authorizer->user_can_create_account
+      || ThrowUserError('auth_cant_create_account');
+
+    Bugzilla->params->{'createemailregexp'}
+      || ThrowUserError('account_creation_disabled');
+}
+
+sub check_and_send_account_creation_confirmation {
+    my ($self, $login) = @_;
+
+    $login = $self->check_login_name_for_creation($login);
+    my $creation_regexp = Bugzilla->params->{'createemailregexp'};
+
+    if ($login !~ /$creation_regexp/i) {
+        ThrowUserError('account_creation_restricted');
+    }
+
+    # Create and send a token for this new account.
+    require Bugzilla::Token;
+    Bugzilla::Token::issue_new_user_account_token($login);
+}
+
 # This is used in a few performance-critical areas where we don't want to
 # do check() and pull all the user data from the database.
 sub login_to_id {
@@ -2516,6 +2542,17 @@ Params: login_name - B<Required> The login name for the new user.
 Takes a username as its only argument. Throws an error if there is no
 user with that username. Returns a C<Bugzilla::User> object.
 
+=item C<check_account_creation_enabled>
+
+Checks that users can create new user accounts, and throws an error
+if user creation is disabled.
+
+=item C<check_and_send_account_creation_confirmation($login)>
+
+If the user request for a new account passes validation checks, an email
+is sent to this user for confirmation. Otherwise an error is thrown
+indicating why the request has been rejected.
+
 =item C<is_available_username>
 
 Returns a boolean indicating whether or not the supplied username is
diff --git a/Bugzilla/WebService/Constants.pm b/Bugzilla/WebService/Constants.pm
index 123b14d68..ab3111eed 100644
--- a/Bugzilla/WebService/Constants.pm
+++ b/Bugzilla/WebService/Constants.pm
@@ -130,6 +130,7 @@ use constant WS_ERROR_CODE => {
     # User errors are 500-600.
     account_exists        => 500,
     illegal_email_address => 501,
+    auth_cant_create_account    => 501,
     account_creation_disabled   => 501,
     account_creation_restricted => 501,
     password_too_short    => 502,
diff --git a/Bugzilla/WebService/User.pm b/Bugzilla/WebService/User.pm
index 2d9276cc3..f8704a947 100644
--- a/Bugzilla/WebService/User.pm
+++ b/Bugzilla/WebService/User.pm
@@ -28,7 +28,6 @@ use Bugzilla::Error;
 use Bugzilla::Group;
 use Bugzilla::User;
 use Bugzilla::Util qw(trim);
-use Bugzilla::Token;
 use Bugzilla::WebService::Util qw(filter validate);
 
 # Don't need auth to login
@@ -91,19 +90,8 @@ sub offer_account_by_email {
     my $email = trim($params->{email})
         || ThrowCodeError('param_required', { param => 'email' });
 
-    my $createexp = Bugzilla->params->{'createemailregexp'};
-    if (!$createexp) {
-        ThrowUserError("account_creation_disabled");
-    }
-    elsif ($email !~ /$createexp/i) {
-        ThrowUserError("account_creation_restricted");
-    }
-
-    $email = Bugzilla::User->check_login_name_for_creation($email);
-
-    # Create and send a token for this new account.
-    Bugzilla::Token::issue_new_user_account_token($email);
-
+    Bugzilla->user->check_account_creation_enabled;
+    Bugzilla->user->check_and_send_account_creation_confirmation($email);
     return undef;
 }
 
@@ -396,14 +384,14 @@ This is the recommended way to create a Bugzilla account.
 
 =over
 
-=item 500 (Illegal Email Address)
+=item 500 (Account Already Exists)
 
-This Bugzilla does not allow you to create accounts with the format of
-email address you specified. Account creation may be entirely disabled.
+An account with that email address already exists in Bugzilla.
 
-=item 501 (Account Already Exists)
+=item 501 (Illegal Email Address)
 
-An account with that email address already exists in Bugzilla.
+This Bugzilla does not allow you to create accounts with the format of
+email address you specified. Account creation may be entirely disabled.
 
 =back
 
-- 
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