TencentOS Server 3: xorg-x11-server (TSSA-2024:0215)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Tencent Linux Security Advisory TSSA-2024:0215.
##

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

if (description)
{
  script_id(238705);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/11/20");

  script_cve_id(
    "CVE-2023-5367",
    "CVE-2023-5380",
    "CVE-2023-6377",
    "CVE-2023-6478",
    "CVE-2024-0229",
    "CVE-2024-0408",
    "CVE-2024-0409",
    "CVE-2024-21885",
    "CVE-2024-21886"
  );

  script_name(english:"TencentOS Server 3: xorg-x11-server (TSSA-2024:0215)");

  script_set_attribute(attribute:"synopsis", value:
"The remote TencentOS Server 3 host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is,
therefore, affected by multiple vulnerabilities as referenced in the TSSA-2024:0215 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2023-5367:
    A out-of-bounds write flaw was found in the xorg-x11-server. This issue occurs due to an incorrect
    calculation of a buffer offset when copying data stored in the heap in the XIChangeDeviceProperty function
    in Xi/xiproperty.c and in RRChangeOutputProperty function in randr/rrproperty.c, allowing for possible
    escalation of privileges or denial of service.

    CVE-2023-5380:
    A use-after-free flaw was found in the xorg-x11-server. An X server crash may occur in a very specific and
    legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode) if
    the pointer is warped from within a window on one screen to the root window of the other screen and if the
    original window is destroyed followed by another window being destroyed.

    CVE-2023-6377:
    A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to
    a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or
    possible remote code execution in cases where X11 forwarding is involved.

    CVE-2023-6478:
    A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or
    RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive
    information.

    CVE-2024-0229:
    An out-of-bounds memory access flaw was found in the X.Org server. This issue can be triggered when a
    device frozen by a sync grab is reattached to a different master device. This issue may lead to an
    application crash, local privilege escalation (if the server runs with extended privileges), or remote
    code execution in SSH X11 forwarding environments.

    CVE-2024-0408:
    A flaw was found in the X.Org server. The GLX PBuffer code does not call the XACE hook when creating the
    buffer, leaving it unlabeled. When the client issues another request to access that resource (as with a
    GetGeometry) or when it creates another resource that needs to access that buffer, such as a GC, the
    XSELINUX code will try to use an object that was never labeled and crash because the SID is NULL.

    CVE-2024-0409:
    A flaw was found in the X.Org server. The cursor code in both Xephyr and Xwayland uses the wrong type of
    private at creation. It uses the cursor bits type with the cursor as private, and when initiating the
    cursor, that overwrites the XSELINUX context.

    CVE-2024-21885:
    A flaw was found in X.Org server. In the XISendDeviceHierarchyEvent function, it is possible to exceed the
    allocated array length when certain new device IDs are added to the xXIHierarchyInfo struct. This can
    trigger a heap buffer overflow condition, which may lead to an application crash or remote code execution
    in SSH X11 forwarding environments.

    CVE-2024-21886:
    A heap buffer overflow flaw was found in the DisableDevice function in the X.Org server. This issue may
    lead to an application crash or, in some circumstances, remote code execution in SSH X11 forwarding
    environments.

Tenable has extracted the preceding description block directly from the Tencent Linux 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://mirrors.tencent.com/tlinux/errata/tssa-20240215.xml");
  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:N/A:N");
  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:L/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-2023-6478");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2024-0409");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2024/05/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/05/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:tencent:tencentos_server:3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:tencent:tencentos_server:xorg-x11-server");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/etc/os-release", "Host/TencentOS/rpm-list", "Host/cpu");

  exit(0);
}


include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'TencentOS' >!< os_product) audit(AUDIT_OS_NOT, 'TencentOS');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'TencentOS');
if (! preg(pattern:"^3([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'TencentOS 3.x', 'TencentOS ' + os_version);

if (!get_kb_item('Host/TencentOS/rpm-list')) 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, 'TencentOS', cpu);

var constraints = [
  {
    'release': '3',
    'pkgs': [
      {'reference':'xorg-x11-server-common-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-common-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-debuginfo-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-debuginfo-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-debugsource-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-debugsource-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-devel-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-devel-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-source-1.20.11-22.tl3', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xdmx-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xdmx-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xdmx-debuginfo-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xdmx-debuginfo-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xephyr-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xephyr-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xephyr-debuginfo-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xephyr-debuginfo-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xnest-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xnest-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xnest-debuginfo-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xnest-debuginfo-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xorg-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xorg-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xorg-debuginfo-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xorg-debuginfo-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xvfb-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xvfb-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xvfb-debuginfo-1.20.11-22.tl3', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'xorg-x11-server-Xvfb-debuginfo-1.20.11-22.tl3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'xorg-x11-server-Xdmx / xorg-x11-server-Xdmx-debuginfo / xorg-x11-server-Xephyr / etc');
}