The Windows Remote Desktop client for Windows installed on the remote host is affected by a remote code execution vulnerability. An attacker who successfully exploited the vulnerability could execute arbitrary code.
#%NASL_MIN_LEVEL 70300
##
# Tenable Network Security, Inc.
##
# The descriptive text and package checks in this plugin were
# extracted from the Microsoft Security Updates API. The text
# itself is copyright (C) Microsoft Corporation.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(152669);
script_version("1.3");
script_set_attribute(attribute:"plugin_modification_date", value:"2023/12/04");
script_cve_id("CVE-2021-34535");
script_name(english:"Remote Desktop client for Windows RCE (August 2021)");
script_set_attribute(attribute:"synopsis", value:
"The Windows app installed on the remote host is affected by a remote code
execution vulnerability.");
script_set_attribute(attribute:"description", value:
"The Windows Remote Desktop client for Windows installed on the remote
host is affected by a remote code execution vulnerability. An attacker who
successfully exploited the vulnerability could execute arbitrary code.");
# https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34535
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d2a45a5b");
# https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/windowsdesktop-whatsnew#updates-for-version-122223
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?bb5c6218");
script_set_attribute(attribute:"solution", value:
"Upgrade to client version 1.2.2223 or later.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
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:R/S:U/C:H/I:H/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-2021-34535");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2021/08/10");
script_set_attribute(attribute:"patch_publication_date", value:"2021/08/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/19");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2021-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("remote_desktop_installed.nbin");
script_require_keys("installed_sw/Microsoft Remote Desktop");
exit(0);
}
include('vcf.inc');
var appname = "Microsoft Remote Desktop";
var app_info = vcf::get_app_info(app:appname, win_local:TRUE);
vcf::check_granularity(app_info:app_info, sig_segments:3);
var constraints = [
{ 'fixed_version' : '1.2.2223.0' }
];
vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);