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Ask the Team  Mailing Lists  Advertising Info  Advisories  About SecuriTeam  Blogs Brought to you by: Suppliers of: Website Testing Tools Network Testing Tools Software Testing Tools SecuriTeam in Your Inbox New vulnerability? New tool? Tell us (Our PGP key). CanSecWest 2012 2nd Annual Cyber Security Hack In Paris	SnortCenter Temporary File Vulnerability 6 Nov. 2002    Summary SnortCenter is a PHP based tool for aggregating many snort sensors into one place to make it easy to keep rules and configurations synchronized. A vulnerability causes temporary files to created by the program to be completely predictable, allowing local users to compromise the SnortCenter server.   Credit: The information has been provided by Clint Byrum. Website Security Scan Code Vulnerability Test Network Assessment Tool Detect hidden vulnerabilities Exhaustive automated testing Real-time, continuous security Get guidance from professionals of internal or 3rd party code. scanning for your entire network    Details Protect your website! Use an External Vulnerability Scanner! Nothing to install. First report in 1 hour! www.beyondsecurity.com/vulnerability-scanner Vulnerable systems:  * SnortCenter version 0.9.5 and prior Immune systems:  * SnortCenter version 0.9.6 Upon choosing to "push" the rules out to a particular sensor, a file is created in the temp directory with the same name as the sensor. So, if your sensor is named "hal" and you push the rules out to it, on the web server, a file is created /tmp/hal. With permissions 777. This means that *anyone* with access to the SnortCenter server's /tmp directory could read the sensor configuration files, among other fun /tmp games. Interesting bits in these files include the usernames/passwords/addresses of the alert database servers. Fix: Version 0.9.6 has been recently released, and should be upgraded to. Additionally Clint has attached a patch for 0.9.5 that uses a more random name (not sure of the security of php4's tempnam() function), and secure permissions on the file. You can get version 0.9.6 at SnortCenter's home page. Patch: --- snortcenter.orig/sensor.inc.php Sat Aug 24 06:26:14 2002 +++ snortcenter/sensor.inc.php Tue Oct  1 13:48:44 2002 @@ -19,6 +19,9 @@  ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */   + +global $senstmpfnam; +  function find_interface_pid($id,$db) {      $result = $db->acidExecute("select cmd_line, interface from sensor where id ='$id'");      $myrow = $result->acidFetchRow(); @@ -135,7 +138,7 @@  }    function create_config($sensor_export, $sensor_id, $db) { - +global $senstmpfnam;  sync_group($sensor_id,$db);    global $snortcenter_ver; @@ -145,7 +148,9 @@      $result = $db->acidExecute("select sensor_name from sensor where id='$sensor_id'");      $myrow = $result->acidFetchRow();      $sensor_name = $myrow[0]; -    echo "<FONT size=1>"; +    if($sensor_export != 'download') { +        echo "<FONT size=1>"; +    }      $result_id = $db->acidExecute("SELECT sid from rulechange where sensor_id='$sensor_id'");      while ($myrow = $result_id->acidFetchRow())      { @@ -155,10 +160,12 @@    if (($sensor_export == 'download') || ($sensor_export == 'push')){      if (strpos($_SERVER["SERVER_SOFTWARE"], "Win") !== false) { -        $fp = fopen ("c:/temp/$sensor_name", "w"); + $senstmpfnam = tempnam("c:/temp",$sensor_name); + $fp = fopen ($senstmpfnam, "w");      }      else { - $fp = fopen ("/tmp/$sensor_name", "w"); + $senstmpfnam = tempnam("/tmp",$sensor_name); + $fp = fopen ($senstmpfnam, "w");      }  }   @@ -685,7 +692,7 @@   if ($sensor_export == 'view') { echo "<BR>"; }  # }   -echo "</FONT>"; +if($sensor_export != 'download') { echo "</FONT>";}  }  return $sensor_name;  } --- snortcenter.orig/sensor.php Sat Aug 24 12:29:53 2002 +++ snortcenter/sensor.php Tue Oct  1 12:38:26 2002 @@ -130,11 +130,13 @@      $sensor_name = create_config("push", $id, $db);      if (strpos($_SERVER["SERVER_SOFTWARE"], "Win") !== false) {   if ($curl_path !='') { $curl_path = rtrim($curl_path,'\\') . '\\'; } - $filename= "c:/temp/$sensor_name"; + #$filename= "c:/temp/$sensor_name"; + $filename=$senstmpfnam;      }      else {   if ($curl_path !='') { $curl_path = rtrim($curl_path,'/') . '/'; } - $filename= "/tmp/$sensor_name"; + #$filename= "/tmp/$sensor_name"; + $filename=$senstmpfnam;      }      $r_option = find_interface_pid($id,$db);      exec($curl_path."curl -s -S --connect-timeout $curl_timeout -F \"interface=$myrow[interface]\" -F \"r_option=$r_option\" -F upload=@\"$filename\" $url 2>&1", $return_string); @@ -143,6 +145,7 @@      }      $cmd_err = push_cmd_line($id,$db);      $sensor_msg = "$line<BR>$cmd_err"; +    unlink($filename);  }     @@ -361,7 +364,7 @@  require('bottom.inc.php');    if ($sensor_ctl == 'download'){ -    echo '<SCRIPT language=javascript>setTimeout("location.href=\'dl.php?sensor_name='.$sensor_name.'\'",0);</SCRIPT>'; +    echo '<SCRIPT language=javascript>setTimeout("location.href=\'dl.php?sensor_name='.$sensor_name.'&id='.$id.'\'",0);</SCRIPT>';  }    ?> --- snortcenter.orig/dl.php Wed Aug  7 10:46:41 2002 +++ snortcenter/dl.php Tue Oct  1 13:50:00 2002 @@ -1,15 +1,16 @@  <?php  if ($sensor_name)  { +    include("config.php"); +    include("sensor.inc.php"); +    $db = NewACIDDBConnection($DBlib_path,$DBtype); +    $db->acidConnect($DB_dbname,$DB_host,$DB_port,$DB_user,$DB_password); +    create_config("download",$id,$db);      global $HTTP_USER_AGENT; -    if (strpos($_SERVER["SERVER_SOFTWARE"], "Win") !== false) { - $download="c:/temp/$sensor_name"; -    } -    else { - $download="/tmp/$sensor_name"; -    } +    global $senstmpfnam; +    #$download="/tmp/$sensor_name";      $name= $sensor_name. '.snort.conf'; -    $size=filesize($download); +    $size=filesize($senstmpfnam);        header("Content-Type: application/octet-steam");      header("Content-Type: application/force-download"); @@ -23,6 +24,7 @@  {      header("Content-Disposition: attachment; filename=".$name);  }     -    readfile($download); +    readfile($senstmpfnam); +    unlink($senstmpfnam);  }  ?>  Comments: blog comments powered by Disqus	All Sections Security News Unix focus Exploits Tools Windows focus Security Reviews  Related Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability Insight Control for Linux Multiple Vulnerabilities HP-UX Running NFS/ONCplus Denial of Service Vulnerability HP-UX Running BIND Denial of Service Vulnerability 2011 HP-UX Running XNTP Denial of Service Vulnerability HP-UX Denial of Service Vulnerability Webkit Detached Body Element Code Execution Vulnerability Mac OS X Compact Font Format Decoder Code Execution Vulnerability WebKit WBR Tag Removal Code Execution Vulnerability Webkit Undefined DOM Prototype Attach Code Execution Vulnerability Apple HFS Information Disclosure Vulnerability XPDF arbitrary Arbitrary Code Execution Vulnerabilities Hewlett-Packard Data Protector Client EXEC_CMD omni_chk_ds.sh Code Execution Vulnerability Red Hat OpenJDK IcedTea6 ClassLoader Code Execution Vulnerability HP-UX Apache Running Tomcat Servlet Engine Remote Modification and Denial of Service Vulnerabilities  Featured Articles ProFTPD Response Pool Use-After-Free Code Execution Vulnerability HP Data Protector Notebook Extension LogClientInstallation SQL Injection Vulnerabilty GE Proficy Historian ihDataArchiver.exe Trusted Header Size Code Execution Vulnerability Novell ZENWorks Software Packaging Antique ActiveX Control Code Execution Vulnerability Adobe Reader U3D IFF RGBA Parsing Code Execution Vulnerability Adobe Reader U3D PCX Parsing Code Execution Vulnerability Cisco Unified Service Monitor brstart add_dm Code Execution Vulnerability
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