Lame
Personal Rating: Very Easy
Enumeration
I ran an extensive nmap scan:
sudo nmap -A -p- <IP>
Starting Nmap 7.92 ( https://nmap.org ) at 2021-10-05 09:48 CEST
Nmap scan report for 10.10.10.3
Host is up (0.19s latency).
Not shown: 996 filtered tcp ports (no-response)
PORT STATE SERVICE VERSION
21/tcp open ftp vsftpd 2.3.4
| ftp-syst:
| STAT:
| FTP server status:
| Connected to 10.10.16.2
| Logged in as ftp
| TYPE: ASCII
| No session bandwidth limit
| Session timeout in seconds is 300
| Control connection is plain text
| Data connections will be plain text
| vsFTPd 2.3.4 - secure, fast, stable
|_End of status
|_ftp-anon: Anonymous FTP login allowed (FTP code 230)
22/tcp open ssh OpenSSH 4.7p1 Debian 8ubuntu1 (protocol 2.0)
| ssh-hostkey:
| 1024 60:0f:cf:e1:c0:5f:6a:74:d6:90:24:fa:c4:d5:6c:cd (DSA)
|_ 2048 56:56:24:0f:21:1d:de:a7:2b:ae:61:b1:24:3d:e8:f3 (RSA)
139/tcp open netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
445/tcp open netbios-ssn Samba smbd 3.0.20-Debian (workgroup: WORKGROUP)
Warning: OSScan results may be unreliable because we could not find at least 1 open and 1 closed port
Aggressive OS guesses: Linux 2.6.23 (92%), Belkin N300 WAP (Linux 2.6.30) (92%), Control4 HC-300 home controller (92%), Dell Integrated Remote Access Controller (iDRAC5) (92%), Dell Integrated Remote Access Controller (iDRAC6) (92%), Linksys WET54GS5 WAP, Tranzeo TR-CPQ-19f WAP, or Xerox WorkCentre Pro 265 printer (92%), Linux 2.4.21 - 2.4.31 (likely embedded) (92%), Citrix XenServer 5.5 (Linux 2.6.18) (92%), Linux 2.6.18 (ClarkConnect 4.3 Enterprise Edition) (92%), Linux 2.6.8 - 2.6.30 (92%)
No exact OS matches for host (test conditions non-ideal).
Network Distance: 2 hops
Service Info: OSs: Unix, Linux; CPE: cpe:/o:linux:linux_kernel
Host script results:
| smb-security-mode:
| account_used: <blank>
| authentication_level: user
| challenge_response: supported
|_ message_signing: disabled (dangerous, but default)
|_smb2-time: Protocol negotiation failed (SMB2)
| smb-os-discovery:
| OS: Unix (Samba 3.0.20-Debian)
| Computer name: lame
| NetBIOS computer name:
| Domain name: hackthebox.gr
| FQDN: lame.hackthebox.gr
|_ System time: 2021-10-05T03:51:17-04:00
|_clock-skew: mean: 2h01m51s, deviation: 2h49m43s, median: 1m50s
TRACEROUTE (using port 445/tcp)
HOP RTT ADDRESS
1 194.07 ms 10.10.16.1
2 273.26 ms 10.10.10.3The anonymous FTP login was a dead end as there was only an empty folder. Running further enumeration on the smb port shew very interesting results though:
| LAME\user (RID: 3002)
| Full name: just a user,111,,
| Flags: Normal user account
| LAME\msfadmin (RID: 3000)
| Full name: msfadmin,,,
| Flags: Normal user account
| smb-ls: Volume \\10.10.10.3\tmp
| SIZE TIME FILENAME
| <DIR> 2021-10-05T08:12:02 .
| <DIR> 2020-10-31T06:33:58 ..
| <DIR> 2021-10-05T07:47:13 vmware-root
| 0 2021-10-05T07:48:19 5563.jsvc_up
| 1600 2021-10-05T07:47:13 vgauthsvclog.txt.0
| \\10.10.10.3\ADMIN$:
| Type: STYPE_IPC
| Comment: IPC Service (lame server (Samba 3.0.20-Debian))
| Users: 1
| Max Users: <unlimited>
| Path: C:\tmp
| Anonymous access: <none>
| \\10.10.10.3\IPC$:
| Type: STYPE_IPC
| Comment: IPC Service (lame server (Samba 3.0.20-Debian))
| Users: 1
| Max Users: <unlimited>
| Path: C:\tmp
| Anonymous access: READ/WRITE
| \\10.10.10.3\opt:
| Type: STYPE_DISKTREE
| Comment:
| Users: 1
| Max Users: <unlimited>
| Path: C:\tmp
| Anonymous access: <none>
| \\10.10.10.3\print$:
| Type: STYPE_DISKTREE
| Comment: Printer Drivers
| Users: 1
| Max Users: <unlimited>
| Path: C:\var\lib\samba\printers
| Anonymous access: <none>
| \\10.10.10.3\tmp:
| Type: STYPE_DISKTREE
| Comment: oh noes!
| Users: 1
| Max Users: <unlimited>
| Path: C:\tmp
|_ Anonymous access: READ/WRITESMB Exploits w/ Metasploit
Searching for a useful module in msfconsole, I tried multi/samba/usermap_script, which worked.
Then I found a CVE for the smb verison on the server, Samba 3.0.20-Debia. The according metasploit module gave me a root shell immediately. This could have been done with a PoC from searchsploit or exploitdb.
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