Rockwell Automation Stratix and ArmorStratix Switches Improper Input Validation (CVE-2018-0173)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(501768);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/04");

  script_cve_id("CVE-2018-0173");
  script_xref(name:"CISA-KNOWN-EXPLOITED", value:"2022/03/17");

  script_name(english:"Rockwell Automation Stratix and ArmorStratix Switches Improper Input Validation (CVE-2018-0173)");

  script_set_attribute(attribute:"synopsis", value:
"The remote OT asset is affected by a vulnerability.");
  script_set_attribute(attribute:"description", value:
"A vulnerability in the Cisco IOS Software and Cisco IOS XE Software 
function that restores encapsulated option 82 information in DHCP Version 4 (DHCPv4) 
packets could allow an unauthenticated, remote attacker to cause an affected 
device to reload, resulting in a denial of service (DoS) condition. 
The vulnerability exists because the affected software performs 
incomplete input validation of encapsulated option 82 information 
that it receives in DHCPOFFER messages from DHCPv4 servers. 
An attacker could exploit this vulnerability by sending a crafted DHCPv4 
packet to an affected device, which the device would then forward to 
a DHCPv4 server. When the affected software processes the option 82 
information that is encapsulated in the response from the server, 
an error could occur. A successful exploit could allow the attacker 
to cause the affected device to reload, resulting in a DoS condition.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.");
  # https://www.cisa.gov/news-events/ics-advisories/icsa-18-107-04
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ce3d1989");
  # https://www.cisa.gov/news-events/ics-advisories/icsa-18-107-05
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?37660900");
  # https://www.rockwellautomation.com/en-us/support/advisory.PN1019.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?0baec066");
  # https://www.rockwellautomation.com/en-us/support/advisory.PN1021.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a252fb13");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-18-107-04");
  script_set_attribute(attribute:"see_also", value:"https://www.cisa.gov/news-events/ics-advisories/icsa-18-107-05");
  script_set_attribute(attribute:"solution", value:
"The following text was originally created by the Cybersecurity and Infrastructure Security Agency (CISA). The original
can be found at CISA.gov.

Rockwell Automation recommends users upgrade to FRN 15.2(6)E1 or later. Updated software can be downloaded at:

http://compatibility.rockwellautomation.com/Pages/MultiProductDownload.aspx?famID=15

Rockwell Automation has provided knowledge base article number 1073268 on their website at the following location to
address these vulnerabilities:

https://rockwellautomation.custhelp.com/app/answers/detail/a_id/1073268/ (login required)

Rockwell Automation also recommends implementing the following mitigations in addition to upgrading the software
version:

Cisco has released new Snort Rules at https://www.cisco.com/web/software/286271056/117258/sf-rules-2018-03-29-new.html
to help address the following vulnerabilities:

- CVE-2018-0171 - Snort Rule 46096 and 46097
- CVE-2018-0156 - Snort Rule 41725
- CVE-2018-0174 - Snort Rule 46120
- CVE-2018-0172 - Snort Rule 46104
- CVE-2018-0173 - Snort Rule 46119
- CVE-2018-0158 - Snort Rule 46110

Cisco adds the following notes for the Smart Install vulnerabilities (CVE-2018-0171 and CVE-2018-0156):

- Smart Install is turned off by express setup; however, upgraded switches but not re-setup may have it enabled.
- Disable the Smart Install feature with the no vstack configuration command if it is not needed or once setup is
complete.
- Users who do use the feature—and need to leave it enabled—can use ACLs to block incoming traffic on TCP port 4786.

CVE-2018-0167 and CVE-2018-0175 have no specific mitigations in place. See the following Cisco Vulnerability advisory
for more details:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp

Rockwell Automation also recommends users implement the following general security guidelines:

- Help minimize network exposure for all control system devices and/or systems, and confirm that they are not accessible
from the Internet.
- Locate control system networks and devices behind firewalls, and isolate them from the business network.
- When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may
have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as
secure as the connected devices.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-0173");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(755);

  script_set_attribute(attribute:"vuln_publication_date", value:"2018/03/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2018/03/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/15");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:rockwellautomation:allen-bradley_stratix_5400_industrial_managed_ethernet_switch");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:rockwellautomation:allen-bradley_stratix_5410_industrial_managed_ethernet_switch");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:rockwellautomation:allen-bradley_stratix_5700_industrial_managed_ethernet_switch");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:rockwellautomation:allen-bradley_stratix_8000_industrial_managed_ethernet_switch");
  script_set_attribute(attribute:"cpe", value:"cpe:/h:rockwellautomation:allen-bradley_stratix_8300_industrial_managed_ethernet_switch");
  script_set_attribute(attribute:"generated_plugin", value:"former");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Tenable.ot");

  script_copyright(english:"This script is Copyright (C) 2023-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_ot_api_integration.nasl");
  script_require_keys("Tenable.ot/Rockwell");

  exit(0);
}


include('tenable_ot_cve_funcs.inc');

get_kb_item_or_exit('Tenable.ot/Rockwell');

var asset = tenable_ot::assets::get(vendor:'Rockwell');

var vuln_cpes = {
    "cpe:/h:rockwellautomation:allen-bradley_stratix_5400_industrial_managed_ethernet_switch" :
        {"versionEndIncluding" : "15.2(6)E0a", "family" : "Stratix"},
    "cpe:/h:rockwellautomation:allen-bradley_stratix_5410_industrial_managed_ethernet_switch" :
        {"versionEndIncluding" : "15.2(6)E0a", "family" : "Stratix"},
    "cpe:/h:rockwellautomation:allen-bradley_stratix_5700_industrial_managed_ethernet_switch" :
        {"versionEndIncluding" : "15.2(6)E0a", "family" : "Stratix"},
    "cpe:/h:rockwellautomation:allen-bradley_stratix_8000_industrial_managed_ethernet_switch" :
        {"versionEndIncluding" : "15.2(6)E0a", "family" : "Stratix"},
    "cpe:/h:rockwellautomation:allen-bradley_stratix_8300_industrial_managed_ethernet_switch" :
        {"versionEndIncluding" : "15.2(4a)EA5", "family" : "Stratix"}
};

tenable_ot::cve::compare_and_report(asset:asset, cpes:vuln_cpes, severity:SECURITY_HOLE);