Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : FreeRDP vulnerabilities (USN-8004-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8004-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(297801);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/04/30");

  script_cve_id(
    "CVE-2026-23530",
    "CVE-2026-23531",
    "CVE-2026-23532",
    "CVE-2026-23533",
    "CVE-2026-23534"
  );
  script_xref(name:"USN", value:"8004-1");
  script_xref(name:"IAVA", value:"2026-A-0099-S");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : FreeRDP vulnerabilities (USN-8004-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by
multiple vulnerabilities as referenced in the USN-8004-1 advisory.

    Kim Dong Han discovered that FreeRDP did not correctly validate the size of certain variables, which could
    cause a buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute
    arbitrary code.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/notices/USN-8004-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:P");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-23534");

  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:"2026/01/19");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/02/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/02/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-shadow-x11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-wayland");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:freerdp2-x11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-client2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-client2-2t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-server2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-server2-2t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow-subsystem2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow-subsystem2-2t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp-shadow2-2t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libfreerdp2-2t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libuwac0-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libuwac0-0t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libuwac0-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr-tools2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr-tools2-2t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr2-2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr2-2t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwinpr2-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:winpr-utils");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl", "ubuntu_pro_sub_detect.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04 / 22.04 / 24.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);
var ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '18.04', 'pkgname': 'freerdp2-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'freerdp2-shadow-x11', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'freerdp2-wayland', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'freerdp2-x11', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libfreerdp-client2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libfreerdp-server2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libfreerdp-shadow-subsystem2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libfreerdp-shadow2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libfreerdp2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libuwac0-0', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libuwac0-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libwinpr-tools2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libwinpr2-2', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'libwinpr2-dev', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '18.04', 'pkgname': 'winpr-utils', 'pkgver': '2.2.0+dfsg1-0ubuntu0.18.04.4+esm3', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'freerdp2-dev', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'freerdp2-shadow-x11', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'freerdp2-wayland', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'freerdp2-x11', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libfreerdp-client2-2', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libfreerdp-server2-2', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libfreerdp-shadow-subsystem2-2', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libfreerdp-shadow2-2', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libfreerdp2-2', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libuwac0-0', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libuwac0-dev', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libwinpr-tools2-2', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libwinpr2-2', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'libwinpr2-dev', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '20.04', 'pkgname': 'winpr-utils', 'pkgver': '2.6.1+dfsg1-0ubuntu0.20.04.2+esm1', 'ubuntu_pro': TRUE},
    {'osver': '22.04', 'pkgname': 'freerdp2-dev', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'freerdp2-shadow-x11', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'freerdp2-wayland', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'freerdp2-x11', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libfreerdp-client2-2', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libfreerdp-server2-2', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libfreerdp-shadow-subsystem2-2', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libfreerdp-shadow2-2', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libfreerdp2-2', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libuwac0-0', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libuwac0-dev', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libwinpr-tools2-2', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libwinpr2-2', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'libwinpr2-dev', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '22.04', 'pkgname': 'winpr-utils', 'pkgver': '2.6.1+dfsg1-3ubuntu2.8', 'ubuntu_pro': FALSE},
    {'osver': '24.04', 'pkgname': 'freerdp2-dev', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'freerdp2-shadow-x11', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'freerdp2-wayland', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'freerdp2-x11', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libfreerdp-client2-2t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libfreerdp-server2-2t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libfreerdp-shadow-subsystem2-2t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libfreerdp-shadow2-2t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libfreerdp2-2t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libuwac0-0t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libuwac0-dev', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libwinpr-tools2-2t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libwinpr2-2t64', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'libwinpr2-dev', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE},
    {'osver': '24.04', 'pkgname': 'winpr-utils', 'pkgver': '2.11.5+dfsg1-1ubuntu0.1~esm3', 'ubuntu_pro': TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  var pro_required = NULL;
  if (!empty_or_null(package_array['ubuntu_pro'])) pro_required = package_array['ubuntu_pro'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) {
        flag++;
        if (!ubuntu_pro_detected && !pro_caveat_needed) pro_caveat_needed = pro_required;
    }
  }
}

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'freerdp2-dev / freerdp2-shadow-x11 / freerdp2-wayland / etc');
}