From 21bfff85c408e66237be0b5eed231d4dd5503881 Mon Sep 17 00:00:00 2001 From: Brian Wolff Date: Mon, 13 Jun 2016 03:07:48 -0400 Subject: [PATCH 09/10] SECURITY: Do not allow users to undelete a page they can't edit or create If the page exists, it only checks edit rights, otherwise it checks both edit and create rights. This would only matter on wikis that have a non-default rights configuration where there are users with undelete rights but a restriction level enabled that prevents them from creating/editing pages (or they otherwise aren't allowed to edit/create) It should be noted that the error messages aren't used in the normal UI currently, but they could be in the future, and extensions could potentially be using them (The backend functions return them, but the UI functions in Special:Undelete ignore them) Bug: T108138 Change-Id: I164b80534cf89e0afca264e9de07431484af8508 --- RELEASE-NOTES-1.27 | 2 ++ includes/Title.php | 13 ++++++++++++- includes/api/ApiUndelete.php | 7 ++++--- languages/i18n/en.json | 4 +++- languages/i18n/qqq.json | 4 +++- 5 files changed, 24 insertions(+), 6 deletions(-) diff --git a/RELEASE-NOTES-1.27 b/RELEASE-NOTES-1.27 index b2ce3a5..30d621f 100644 --- a/RELEASE-NOTES-1.27 +++ b/RELEASE-NOTES-1.27 @@ -38,6 +38,8 @@ was released. in it's fallback chain when trying to work out where to write the cache. * (T48143) SECURITY: Spam blacklist ineffective on encoded URLs inside file inclusion syntax's link parameter. +* (T108138) SECURITY: Sysops can undelete pages, although the page is protected against + it. == MediaWiki 1.27.1 == diff --git a/includes/Title.php b/includes/Title.php index 6ba53d6..850478c 100644 --- a/includes/Title.php +++ b/includes/Title.php @@ -2300,7 +2300,18 @@ class Title implements LinkTarget { ) { $errors[] = [ 'delete-toobig', $wgLang->formatNum( $wgDeleteRevisionsLimit ) ]; } - } + } elseif ( $action === 'undelete' ) { + if ( count( $this->getUserPermissionsErrorsInternal( 'edit', $user, $rigor, true ) ) ) { + // Undeleting implies editing + $errors[] = [ 'undelete-cantedit' ]; + } + if ( !$this->exists() + && count( $this->getUserPermissionsErrorsInternal( 'create', $user, $rigor, true ) ) + ) { + // Undeleting where nothing currently exists implies creating + $errors[] = [ 'undelete-cantcreate' ]; + } + } return $errors; } diff --git a/includes/api/ApiUndelete.php b/includes/api/ApiUndelete.php index e24f2ce..e201c4e 100644 --- a/includes/api/ApiUndelete.php +++ b/includes/api/ApiUndelete.php @@ -34,9 +34,6 @@ class ApiUndelete extends ApiBase { $params = $this->extractRequestParams(); $user = $this->getUser(); - if ( !$user->isAllowed( 'undelete' ) ) { - $this->dieUsageMsg( 'permdenied-undelete' ); - } if ( $user->isBlocked() ) { $this->dieBlocked( $user->getBlock() ); @@ -47,6 +44,10 @@ class ApiUndelete extends ApiBase { $this->dieUsageMsg( [ 'invalidtitle', $params['title'] ] ); } + if ( !$titleObj->userCan( 'undelete', $user, 'secure' ) ) { + $this->dieUsageMsg( 'permdenied-undelete' ); + } + // Check if user can add tags if ( !is_null( $params['tags'] ) ) { $ableToTag = ChangeTags::canAddTagsAccompanyingChange( $params['tags'], $user ); diff --git a/languages/i18n/en.json b/languages/i18n/en.json index 10e504a..88361e3 100644 --- a/languages/i18n/en.json +++ b/languages/i18n/en.json @@ -4174,5 +4174,7 @@ "rawhtml-notallowed": "<html> tags cannot be used outside of normal pages.", "gotointerwiki": "Leaving {{SITENAME}}", "gotointerwiki-invalid": "The specified title was invalid.", - "gotointerwiki-external": "You are about to leave {{SITENAME}} to visit [[$2]] which is a separate website.\n\n[$1 Click here to continue on to $1]." + "gotointerwiki-external": "You are about to leave {{SITENAME}} to visit [[$2]] which is a separate website.\n\n[$1 Click here to continue on to $1].", + "undelete-cantedit": "You cannot undelete this page as you are not allowed to edit this page.", + "undelete-cantcreate": "You cannot undelete this page as there is no existing page with this name and you are not allowed to create this page." } diff --git a/languages/i18n/qqq.json b/languages/i18n/qqq.json index a43c8ff..00c4188 100644 --- a/languages/i18n/qqq.json +++ b/languages/i18n/qqq.json @@ -4352,5 +4352,7 @@ "rawhtml-notallowed": "Error message given when $wgRawHtml = true; is set and a user uses an <html> tag in a system message or somewhere other than a normal page.", "gotointerwiki": "{{doc-special|GoToInterwiki}}\n\nSpecial:GoToInterwiki is a warning page displayed before redirecting users to external interwiki links. Its triggered by people going to something like [[Special:Search/google:foo]].", "gotointerwiki-invalid": "Message shown on Special:GoToInterwiki if given an invalid title.", - "gotointerwiki-external": "Message shown on Special:GoToInterwiki if given a external interwiki link (e.g. [[Special:GoToInterwiki/Google:Foo]]). $1 is the full url the user is trying to get to. $2 is the text of the interwiki link (e.g. \"Google:foo\")." + "gotointerwiki-external": "Message shown on Special:GoToInterwiki if given a external interwiki link (e.g. [[Special:GoToInterwiki/Google:Foo]]). $1 is the full url the user is trying to get to. $2 is the text of the interwiki link (e.g. \"Google:foo\").", + "undelete-cantedit": "Shown if the user tries to undelete a page that they cannot edit", + "undelete-cantcreate": "Shown if the user tries to undelete a page which currently does not exist, and they are not allowed to create it. This could for example happen on a wiki with custom protection levels where the page name has been create-protected and the user has the right to undelete but not the right to edit protected pages." } -- 2.9.3