Metasploit Exploit und Payload (Samba)

Schwachstelle suchen

• Mittels nmap einen Port suchen. In diesem Fall Samba.
• Befehl: root@kali:~# nmap -sV 10.82.1.101

Starting Nmap 7.80 ( https://nmap.org ) at 2020-11-02 12:48 CET 
Nmap scan report for 10.82.1.101
Host is up (0.00015s latency).
Not shown: 977 closed ports
PORT     STATE SERVICE     VERSION
21/tcp   open  ftp         vsftpd 2.3.4
22/tcp   open  ssh         OpenSSH 4.7p1 Debian 8ubuntu1 (protocol 2.0)
23/tcp   open  telnet      Linux telnetd
25/tcp   open  smtp        Postfix smtpd
53/tcp   open  domain      ISC BIND 9.4.2
80/tcp   open  http        Apache httpd 2.2.8 ((Ubuntu) DAV/2)
111/tcp  open  rpcbind
139/tcp  open  netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
445/tcp  open  netbios-ssn Samba smbd 3.X - 4.X (workgroup: WORKGROUP)
512/tcp  open  exec        netkit-rsh rexecd
513/tcp  open  login
514/tcp  open  tcpwrapped
1099/tcp open  java-rmi    GNU Classpath grmiregistry
1524/tcp open  bindshell   Metasploitable root shell
2049/tcp open  rpcbind
2121/tcp open  ftp         ProFTPD 1.3.1
3306/tcp open  mysql       MySQL 5.0.51a-3ubuntu5
5432/tcp open  postgresql  PostgreSQL DB 8.3.0 - 8.3.7
5900/tcp open  vnc         VNC (protocol 3.3)
6000/tcp open  X11         (access denied)
6667/tcp open  irc         UnrealIRCd
8009/tcp open  ajp13       Apache Jserv (Protocol v1.3)
8180/tcp open  http        Apache Tomcat/Coyote JSP engine 1.1

Genaue Version

Durch nmap kann die genaue Version von Samba nicht gesehen werden. Deshalb wird ein Modul von Metasploit benötigt.

• Es wird folgender Befehl in der msfconsole abgesetzt um das Versions Module zu nutzen:
  • msf5 > use auxiliary/scanner/smb/smb_version

• Nun wird noch die RHOSTS (Die IP des Opfers) benötigt:
  • msf5 auxiliary(scanner/smb/smb_version) > set RHOSTS 10.82.1.101

• Durch den Befehl show options werden die momentanen Einstellung gezeigt:

msf5 auxiliary(scanner/smb/smb_version) > show options

Module options (auxiliary/scanner/smb/smb_version):
Name       Current Setting  Required  Description
  ----       ---------------  --------  -----------
RHOSTS     10.82.1.101      yes       The target host(s), range CIDR identifier, or hosts file with syntax 'file:<path>'
SMBDomain  .                no        The Windows domain to use for authentication
SMBPass                     no        The password for the specified username
SMBUser                     no        The username to authenticate as
THREADS    1                yes       The number of concurrent threads (max one per host)

• Durch das absetzen von dem Befehl run kann nun die genaue Samba Version ermittelt werden

msf5 auxiliary(scanner/smb/smb_version) > run

[*] 10.82.1.101:445       - Host could not be identified: Unix (Samba 3.0.20-Debian)

Angriff mittels passendem Samba Module

• Um nach Modulen zu suchen die wir nun für diese Version nutzen können muss folgender Befehl abgesetzt werden:

search Samba 3.0.20

Matching Modules
================
  #   Name                                                   Disclosure Date  Rank       Check  Description
  -   ----                                                   ---------------  ----       -----  -----------
  0   auxiliary/admin/http/wp_easycart_privilege_escalation  2015-02-25       normal     Yes    WordPress WP EasyCart Plugin Privilege Escalation
  1   auxiliary/admin/smb/samba_symlink_traversal                             normal     No     Samba Symlink Directory Traversal
  2   auxiliary/dos/samba/lsa_addprivs_heap                                   normal     No     Samba lsa_io_privilege_set Heap Overflow
  3   auxiliary/dos/samba/lsa_transnames_heap                                 normal     No     Samba lsa_io_trans_names Heap Overflow
  4   auxiliary/dos/samba/read_nttrans_ea_list                                normal     No     Samba read_nttrans_ea_list Integer Overflow
  5   auxiliary/scanner/rsync/modules_list                                    normal     No     List Rsync Modules
  6   auxiliary/scanner/smb/smb_uninit_cred                                   normal     Yes    Samba _netr_ServerPasswordSet Uninitialized Credential State
  7   exploit/freebsd/samba/trans2open                       2003-04-07       great      No     Samba trans2open Overflow (*BSD x86)
  8   exploit/linux/samba/chain_reply                        2010-06-16       good       No     Samba chain_reply Memory Corruption (Linux x86)
  9   exploit/linux/samba/is_known_pipename                  2017-03-24       excellent  Yes    Samba is_known_pipename() Arbitrary Module Load
  10  exploit/linux/samba/lsa_transnames_heap                2007-05-14       good       Yes    Samba lsa_io_trans_names Heap Overflow
  11  exploit/linux/samba/setinfopolicy_heap                 2012-04-10       normal     Yes    Samba SetInformationPolicy AuditEventsInfo Heap Overflow
  12  exploit/linux/samba/trans2open                         2003-04-07       great      No     Samba trans2open Overflow (Linux x86)
  13  exploit/multi/samba/nttrans                            2003-04-07       average    No     Samba 2.2.2 - 2.2.6 nttrans Buffer Overflow
  14  exploit/multi/samba/usermap_script                     2007-05-14       excellent  No     Samba "username map script" Command Execution
  15  exploit/osx/samba/lsa_transnames_heap                  2007-05-14       average    No     Samba lsa_io_trans_names Heap Overflow
  16  exploit/osx/samba/trans2open                           2003-04-07       great      No     Samba trans2open Overflow (Mac OS X PPC)