Cayman DSL Router Unauthenticated Access - Nessus

High   Plugin ID: 10345

This page contains detailed information about the Cayman DSL Router Unauthenticated Access Nessus plugin including available exploits and PoCs found on GitHub, in Metasploit or Exploit-DB for verifying of this vulnerability.

Table Of Contents
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Plugin Overview

ID: 10345
Name: Cayman DSL Router Unauthenticated Access
Filename: passwordless_cayman_router.nasl
Vulnerability Published: 1999-01-01
This Plugin Published: 2000-03-12
Last Modification Time: 2018-08-13
Plugin Version: 1.16
Plugin Type: remote
Plugin Family: Misc.
Dependencies: find_service1.nasl

Vulnerability Information

Severity: High
Vulnerability Published: 1999-01-01
Patch Published: N/A
CVE [?]: CVE-1999-0508
CPE [?]: N/A

Synopsis

It is possible to log in to the remote router without any password.

Description

The remote router has no password. An intruder may connect to it and disable it easily.

Solution

Set a strong password.

Public Exploits

Target Network Port(s): 23
Target Asset(s): Services/telnet
Exploit Available: True (Metasploit Framework)
Exploit Ease: Exploits are available

Here's the list of publicly known exploits and PoCs for verifying the Cayman DSL Router Unauthenticated Access vulnerability:

  1. Metasploit: auxiliary/scanner/snmp/snmp_login
    [SNMP Community Scanner]
  2. Metasploit: auxiliary/scanner/snmp/snmp_login
    [SNMP Community Login Scanner]

Before running any exploit against any system, make sure you are authorized by the owner of the target system(s) to perform such activity. In any other case, this would be considered as an illegal activity.

Risk Information

CVSS V2 Vector [?]: AV:N/AC:L/Au:N/C:P/I:P/A:P
CVSS Base Score:7.5 (High)
Impact Subscore:6.4
Exploitability Subscore:10.0
CVSS Temporal Score:NA (None)
CVSS Environmental Score:NA (None)
Modified Impact Subscore:NA
Overall CVSS Score:7.5 (High)

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Plugin Source

This is the passwordless_cayman_router.nasl nessus plugin source code. This script is Copyright (C) 2000-2018 Tenable Network Security, Inc. 

#
# (C) Tenable Network Security, Inc.
#


include("compat.inc");

if(description)
{
 script_id(10345);
 script_version ("1.16");

 script_cve_id("CVE-1999-0508");

 script_name(english:"Cayman DSL Router Unauthenticated Access");
 
 script_set_attribute(attribute:"synopsis", value:
"It is possible to log in to the remote router without any
password." );
 script_set_attribute(attribute:"description", value:
"The remote router has no password. An intruder
may connect to it and disable it easily." );
 script_set_attribute(attribute:"solution", value:
"Set a strong password." );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"metasploit_name", value:'SNMP Community Scanner');
  script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
 script_set_attribute(attribute:"plugin_publication_date", value: "2000/03/12");
 script_cvs_date("Date: 2018/08/13 14:32:36");
 script_set_attribute(attribute:"vuln_publication_date", value: "1999/01/01");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_end_attributes();

 script_summary(english:"Notifies that the remote cayman router has no password");
 script_category(ACT_GATHER_INFO);
 script_copyright(english:"This script is Copyright (C) 2000-2018 Tenable Network Security, Inc.");
 script_family(english:"Misc.");
 script_dependencie("find_service1.nasl");
 script_require_ports("Services/telnet", 23);
 exit(0);
}

#
# The script code starts here
#
include('telnet_func.inc');
port = get_kb_item("Services/telnet");
if(!port) port = 23;

if(get_port_state(port))
{
 buf = get_telnet_banner(port:port);
 if ( ! buf || "Terminal shell" >!< buf ) exit(0);
 soc = open_sock_tcp(port);
 if(soc)
 {
  buf = telnet_negotiate(socket:soc);
  if("Terminal shell" >< buf)
  	{
	 r = recv(socket:soc, length:2048);
	 b = buf + r;
	 if("completed login" >< b)security_hole(port);
	}
  close(soc);
 }
}

The latest version of this script can be found in these locations depending on your platform:

  • Linux / Unix:
    /opt/nessus/lib/nessus/plugins/passwordless_cayman_router.nasl
  • Windows:
    C:\ProgramData\Tenable\Nessus\nessus\plugins\passwordless_cayman_router.nasl
  • Mac OS X:
    /Library/Nessus/run/lib/nessus/plugins/passwordless_cayman_router.nasl

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How to Run

Here is how to run the Cayman DSL Router Unauthenticated Access as a standalone plugin via the Nessus web user interface (https://localhost:8834/):

  1. Click to start a New Scan.
  2. Select Advanced Scan.
  3. Navigate to the Plugins tab.
  4. On the top right corner click to Disable All plugins.
  5. On the left side table select Misc. plugin family.
  6. On the right side table select Cayman DSL Router Unauthenticated Access plugin ID 10345.
  7. Specify the target on the Settings tab and click to Save the scan.
  8. Run the scan.

Here are a few examples of how to run the plugin in the command line. Note that the examples below demonstrate the usage on the Linux / Unix platform.

Basic usage:

/opt/nessus/bin/nasl passwordless_cayman_router.nasl -t <IP/HOST>

Run the plugin with audit trail message on the console:

/opt/nessus/bin/nasl -a passwordless_cayman_router.nasl -t <IP/HOST>

Run the plugin with trace script execution written to the console (useful for debugging):

/opt/nessus/bin/nasl -T - passwordless_cayman_router.nasl -t <IP/HOST>

Run the plugin with using a state file for the target and updating it (useful for running multiple plugins on the target):

/opt/nessus/bin/nasl -K /tmp/state passwordless_cayman_router.nasl -t <IP/HOST>

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References

See also: Similar and related Nessus plugins:
  • 10747 - 3Com Superstack 3 Switch Multiple Default Accounts
  • 18415 - Bay Networks Accelar 1200 Switch Default Password (password) for 'usrname' Account
  • 18414 - Allied Telesyn Router/Switch Default Password
  • 18413 - Allied Telesyn Router/Switch Web Interface Default Password
  • 17638 - Avaya P330 Stackable Switch Default Password
  • 10961 - AirConnect Default Password
  • 11202 - Enhydra Multiserver Default Password
  • 10820 - F5 Device Default Support Password
  • 10995 - Sun JavaServer Default Admin Password
  • 10998 - Shiva LanRover Blank Password
  • 10999 - Linksys Router Default Password
  • 11203 - Motorola Vanguard with No Password (telnet check)
  • 10798 - Symantec pcAnywhere Service Unrestricted Access
  • 10778 - SiteScope Web Service Unpassworded Access
  • 11004 - Ipswitch WhatsUp Gold Default Admin Account
  • 30213 - MikroTik RouterOS with Blank Password (telnet check)
  • 40354 - OpenWrt Router with a Blank Password (telnet check)
  • 10483 - PostgreSQL Default Unpassworded Account
  • 10500 - Shiva Integrator Default Password

Version

This page has been produced using Nessus Professional 10.1.2 (#68) LINUX, Plugin set 202205072148.
Plugin file passwordless_cayman_router.nasl version 1.16. For more plugins, visit the Nessus Plugin Library.

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