Tenable Nessus Agent < 8.3.1 Multiple Vulnerabilities (TNS-2021-15)

2021-09-09T00:00:00
ID TENABLE_NESSUS_AGENT_TNS_2021_15.NASL
Type nessus
Reporter This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2021-09-20T00:00:00

Description

According to its self-reported version, the Tenable Nessus agent running on the remote host is prior to 8.3.1. It is, therefore, affected by multiple privilege escalation vulnerabilities which could allow an allow an authenticated, local administrator to run specific executables on the Nessus Agent host.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

                                        
                                            #%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
##

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(153159);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/09/20");

  script_cve_id("CVE-2021-20117", "CVE-2021-20118");
  script_xref(name:"IAVA", value:"2021-A-0409");

  script_name(english:"Tenable Nessus Agent < 8.3.1 Multiple Vulnerabilities (TNS-2021-15)");

  script_set_attribute(attribute:"synopsis", value:
"An instance of Nessus Agent installed on the remote system is affected by a multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version, the Tenable Nessus agent running on the remote host is prior to 8.3.1. It is,
therefore, affected by multiple privilege escalation vulnerabilities which could allow an allow an authenticated, local
administrator to run specific executables on the Nessus Agent host.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://www.tenable.com/security/tns-2021-15");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Tenable Nessus Agent version 8.3.1 or later.");
  script_set_attribute(attribute:"agent", value:"all");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-20118");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/09/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/09/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/09/09");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:tenable:nessus_agent");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("tenable_nessus_agent_installed_win.nbin", "nessus_agent_installed_macos.nbin", "nessus_agent_installed_linux.nbin");
  script_require_keys("installed_sw/Tenable Nessus Agent");

  exit(0);
}

include('vcf.inc');

var app_info = vcf::get_app_info(app:'Tenable Nessus Agent');

var constraints = [
  { 'fixed_version':'8.3.1' }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);