Cisco IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability

# SPDX-FileCopyrightText: 2017 Greenbone AG
# Some text descriptions might be excerpted from (a) referenced
# source(s), and are Copyright (C) by the respective right holder(s).
#
# SPDX-License-Identifier: GPL-2.0-only

CPE = "cpe:/o:cisco:ios_xe";

if (description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.106671");
  script_xref(name:"CISA", value:"Known Exploited Vulnerability (KEV) catalog");
  script_xref(name:"URL", value:"https://www.cisa.gov/known-exploited-vulnerabilities-catalog");
  script_cve_id("CVE-2017-3881");
  script_tag(name:"cvss_base", value:"10.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_version("2023-07-14T16:09:27+0000");

  script_name("Cisco IOS XE Software Cluster Management Protocol Remote Code Execution Vulnerability");

  script_xref(name:"URL", value:"https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170317-cmp");

  script_tag(name:"vuldetect", value:"Checks if a vulnerable version is present on the target host.");

  script_tag(name:"solution", value:"See the referenced vendor advisory for a solution.");

  script_tag(name:"summary", value:"A vulnerability in the Cisco Cluster Management Protocol (CMP) processing
code in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a reload of an
affected device or remotely execute code with elevated privileges.");

  script_tag(name:"insight", value:"The Cluster Management Protocol utilizes Telnet internally as a signaling
and command protocol between cluster members. The vulnerability is due to the combination of two factors:

  - The failure to restrict the use of CMP-specific Telnet options only to internal, local communications between
cluster members and instead accept and process such options over any Telnet connection to an affected device, and

  - The incorrect processing of malformed CMP-specific Telnet options.

An attacker could exploit this vulnerability by sending malformed CMP-specific Telnet options while establishing
a Telnet session with an affected Cisco device configured to accept Telnet connections.");

  script_tag(name:"impact", value:"An exploit could allow an attacker to execute arbitrary code and obtain full
control of the device or cause a reload of the affected device.");

  script_tag(name:"qod_type", value:"package");
  script_tag(name:"solution_type", value:"VendorFix");

  script_tag(name:"last_modification", value:"2023-07-14 16:09:27 +0000 (Fri, 14 Jul 2023)");
  script_tag(name:"severity_vector", value:"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_tag(name:"severity_origin", value:"NVD");
  script_tag(name:"severity_date", value:"2020-08-07 20:08:00 +0000 (Fri, 07 Aug 2020)");
  script_tag(name:"creation_date", value:"2017-03-20 11:02:32 +0700 (Mon, 20 Mar 2017)");
  script_category(ACT_GATHER_INFO);
  script_family("CISCO");
  script_copyright("Copyright (C) 2017 Greenbone AG");
  script_dependencies("gb_cisco_ios_xe_consolidation.nasl");
  script_mandatory_keys("cisco/ios_xe/detected");

  exit(0);
}

include("host_details.inc");
include("version_func.inc");

if (!version = get_app_version(cpe: CPE, nofork: TRUE))
  exit(0);

affected = make_list(
  '2.2.0',
  '2.2.1',
  '2.2.2',
  '2.2.3',
  '2.3.0',
  '2.3.1',
  '2.3.1t',
  '2.3.2',
  '2.4.0',
  '2.4.1',
  '2.4.2',
  '2.4.3',
  '2.5.0',
  '2.5.1',
  '2.6.0',
  '2.6.1',
  '3.1.0SG',
  '3.1.1SG',
  '3.2.0SG',
  '3.2.0XO',
  '3.2.10SG',
  '3.2.11SG',
  '3.2.1SG',
  '3.2.2SG',
  '3.2.3SG',
  '3.2.4SG',
  '3.2.5SG',
  '3.2.6SG',
  '3.2.7SG',
  '3.2.8SG',
  '3.2.9SG',
  '3.3.0SG',
  '3.3.0SQ',
  '3.3.0XO',
  '3.3.1SG',
  '3.3.1SQ',
  '3.3.1XO',
  '3.3.2SG',
  '3.3.2XO',
  '3.4.0SG',
  '3.4.0SQ',
  '3.4.1SG',
  '3.4.1SQ',
  '3.4.2SG',
  '3.4.3SG',
  '3.4.4SG',
  '3.4.5SG',
  '3.4.6SG',
  '3.4.7SG',
  '3.4.7a.SG',
  '3.4.8SG',
  '3.4.9SG',
  '3.5.0E',
  '3.5.0SQ',
  '3.5.1E',
  '3.5.1SQ',
  '3.5.2E',
  '3.5.2SQ',
  '3.5.3E',
  '3.5.3SQ',
  '3.5.4SQ',
  '3.5.5SQ',
  '3.5.7SQ',
  '3.6.0E',
  '3.6.1E',
  '3.6.2E',
  '3.6.2a.E',
  '3.6.3E',
  '3.6.4E',
  '3.6.5E',
  '3.6.5a.E',
  '3.6.5b.E',
  '3.6.6E',
  '3.7.0E',
  '3.7.1E',
  '3.7.2E',
  '3.7.3E',
  '3.7.4E',
  '3.7.5E',
  '3.8.0E',
  '3.8.0EX',
  '3.8.1E',
  '3.8.1S',
  '3.8.2E',
  '3.8.3E',
  '3.9.0E',
  '3.9.1E');

foreach af (affected) {
  if (version == af) {
    report = report_fixed_ver(installed_version: version, fixed_version: "See advisory");
    security_message(port: 0, data: report);
    exit(0);
  }
}

exit(99);