Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2024-522)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Amazon Linux 2023 Security Advisory ALAS2023-2024-522.
##

include('compat.inc');

if (description)
{
  script_id(190736);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/20");

  script_cve_id(
    "CVE-2023-6377",
    "CVE-2023-6478",
    "CVE-2023-6816",
    "CVE-2024-0229",
    "CVE-2024-0408",
    "CVE-2024-0409",
    "CVE-2024-21885",
    "CVE-2024-21886"
  );

  script_name(english:"Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2024-522)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Amazon Linux 2023 host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2024-522 advisory.

  - 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-2023-6377)

  - 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-2023-6478)

  - A flaw was found in X.Org server. Both DeviceFocusEvent and the XIQueryPointer reply contain a bit for
    each logical button currently down. Buttons can be arbitrarily mapped to any value up to 255, but the
    X.Org Server was only allocating space for the device's particular number of buttons, leading to a heap
    overflow if a bigger value was used. (CVE-2023-6816)

  - 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-2024-0229)

  - 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-2024-0408)

  - 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-2024-0409)

  - 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-2023-6377) (CVE-2024-21885,
    CVE-2024-21886)

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://alas.aws.amazon.com/AL2023/ALAS-2024-522.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-6377.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-6478.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2023-6816.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-0229.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-0408.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-0409.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-21885.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/cve/html/CVE-2024-21886.html");
  script_set_attribute(attribute:"see_also", value:"https://alas.aws.amazon.com/faqs.html");
  script_set_attribute(attribute:"solution", value:
"Run 'dnf update xorg-x11-server --releasever 2023.3.20240219' to update your system.");
  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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2023-6816");

  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:"2023/12/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/02/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/02/20");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xdmx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xdmx-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xephyr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xephyr-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xnest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xnest-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xorg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xorg-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xvfb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-Xvfb-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-debuginfo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-debugsource");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:amazon:linux:xorg-x11-server-source");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:amazon:linux:2023");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/AmazonLinux/release", "Host/AmazonLinux/rpm-list");

  exit(0);
}

include("rpm.inc");

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);

var alas_release = get_kb_item("Host/AmazonLinux/release");
if (isnull(alas_release) || !strlen(alas_release)) audit(AUDIT_OS_NOT, "Amazon Linux");
var os_ver = pregmatch(pattern: "^AL(A|\d+|-\d+)", string:alas_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "Amazon Linux");
os_ver = os_ver[1];
if (os_ver != "-2023")
{
  if (os_ver == 'A') os_ver = 'AMI';
  audit(AUDIT_OS_NOT, "Amazon Linux 2023", "Amazon Linux " + os_ver);
}

if (!get_kb_item("Host/AmazonLinux/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

var pkgs = [
    {'reference':'xorg-x11-server-common-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-common-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-debugsource-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-debugsource-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-devel-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-devel-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-source-1.20.14-30.amzn2023.0.1', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xdmx-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xdmx-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xdmx-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xdmx-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xephyr-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xephyr-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xephyr-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xephyr-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xnest-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xnest-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xnest-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xnest-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xorg-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xorg-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xorg-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xorg-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xvfb-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xvfb-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xvfb-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'aarch64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xvfb-debuginfo-1.20.14-30.amzn2023.0.1', 'cpu':'x86_64', 'release':'AL-2023', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  var exists_check = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (!empty_or_null(package_array['exists_check'])) exists_check = package_array['exists_check'];
  if (reference && _release && (!exists_check || rpm_exists(release:_release, rpm:exists_check))) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) 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");
}