Oracle Linux 7 : Xorg (ELSA-2019-2079)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2019-2079.
##

include('compat.inc');

if (description)
{
  script_id(180786);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/07");

  script_cve_id(
    "CVE-2018-14598",
    "CVE-2018-14599",
    "CVE-2018-14600",
    "CVE-2018-15853",
    "CVE-2018-15854",
    "CVE-2018-15855",
    "CVE-2018-15856",
    "CVE-2018-15857",
    "CVE-2018-15859",
    "CVE-2018-15861",
    "CVE-2018-15862",
    "CVE-2018-15863",
    "CVE-2018-15864"
  );

  script_name(english:"Oracle Linux 7 : Xorg (ELSA-2019-2079)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2019-2079 advisory.

  - An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can
    send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed
    later on, leading to DoS (segmentation fault). (CVE-2018-14598)

  - An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable
    to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other
    impact. (CVE-2018-14599)

  - Endless recursion exists in xkbcomp/expr.c in xkbcommon and libxkbcommon before 0.8.1, which could be used
    by local attackers to crash xkbcommon users by supplying a crafted keymap file that triggers boolean
    negation. (CVE-2018-15853)

  - Unchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL
    pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because the XkbFile for an
    xkb_geometry section was mishandled. (CVE-2018-15855)

  - An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a
    variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading
    to DoS or remote code execution. (CVE-2018-14600)

  - Unchecked NULL pointer usage in xkbcommon before 0.8.1 could be used by local attackers to crash (NULL
    pointer dereference) the xkbcommon parser by supplying a crafted keymap file, because geometry tokens were
    desupported incorrectly. (CVE-2018-15854)

  - An infinite loop when reaching EOL unexpectedly in compose/parser.c (aka the keymap parser) in xkbcommon
    before 0.8.1 could be used by local attackers to cause a denial of service during parsing of crafted
    keymap files. (CVE-2018-15856)

  - Unchecked NULL pointer usage when parsing invalid atoms in ExprResolveLhs in xkbcomp/expr.c in xkbcommon
    before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by
    supplying a crafted keymap file, because lookup failures are mishandled. (CVE-2018-15859)

  - Unchecked NULL pointer usage in ResolveStateAndPredicate in xkbcomp/compat.c in xkbcommon before 0.8.2
    could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a
    crafted keymap file with a no-op modmask expression. (CVE-2018-15863)

  - An invalid free in ExprAppendMultiKeysymList in xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be
    used by local attackers to crash xkbcommon keymap parsers or possibly have unspecified other impact by
    supplying a crafted keymap file. (CVE-2018-15857)

  - Unchecked NULL pointer usage in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used
    by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap
    file that triggers an xkb_intern_atom failure. (CVE-2018-15861)

  - Unchecked NULL pointer usage in LookupModMask in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by
    local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap
    file with invalid virtual modifiers. (CVE-2018-15862)

  - Unchecked NULL pointer usage in resolve_keysym in xkbcomp/parser.y in xkbcommon before 0.8.2 could be used
    by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap
    file, because a map access attempt can occur for a map that was never created. (CVE-2018-15864)

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://linux.oracle.com/errata/ELSA-2019-2079.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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-2018-14600");

  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:"2018/08/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/09/07");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:7");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdm-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdm-pam-extensions-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libX11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libX11-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libX11-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libxkbcommon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libxkbcommon-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libxkbcommon-x11");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:libxkbcommon-x11-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mesa-libGLw");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mesa-libGLw-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-drv-ati");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-drv-vesa");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-drv-wacom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-drv-wacom-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-Xdmx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-Xephyr");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-Xnest");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-Xorg");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-Xvfb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-Xwayland");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:xorg-x11-server-source");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item('Host/OracleLinux')) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_release = get_kb_item("Host/RedHat/release");
if (isnull(os_release) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_release)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_ver = pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux) .*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
os_ver = os_ver[1];
if (! preg(pattern:"^7([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Oracle Linux 7', 'Oracle Linux ' + os_ver);

if (!get_kb_item('Host/RedHat/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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var pkgs = [
    {'reference':'libX11-common-1.6.7-2.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-source-1.20.4-7.el7', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gdm-3.28.2-16.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-devel-3.28.2-16.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-pam-extensions-devel-3.28.2-16.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'libX11-1.6.7-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libX11-devel-1.6.7-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-0.7.1-3.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-devel-0.7.1-3.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-x11-0.7.1-3.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-x11-devel-0.7.1-3.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'mesa-libGLw-8.0.0-5.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'mesa-libGLw-devel-8.0.0-5.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-ati-19.0.1-2.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-wacom-0.36.1-3.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-wacom-devel-0.36.1-3.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xdmx-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xephyr-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xnest-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xorg-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xvfb-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xwayland-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-common-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-devel-1.20.4-7.el7', 'cpu':'aarch64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gdm-3.28.2-16.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-devel-3.28.2-16.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-pam-extensions-devel-3.28.2-16.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'libX11-1.6.7-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libX11-devel-1.6.7-2.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-0.7.1-3.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-devel-0.7.1-3.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-x11-0.7.1-3.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-x11-devel-0.7.1-3.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'mesa-libGLw-8.0.0-5.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'mesa-libGLw-devel-8.0.0-5.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-wacom-devel-0.36.1-3.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-devel-1.20.4-7.el7', 'cpu':'i686', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'gdm-3.28.2-16.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-devel-3.28.2-16.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'gdm-pam-extensions-devel-3.28.2-16.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
    {'reference':'libX11-1.6.7-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libX11-devel-1.6.7-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-0.7.1-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-devel-0.7.1-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-x11-0.7.1-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'libxkbcommon-x11-devel-0.7.1-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'mesa-libGLw-8.0.0-5.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'mesa-libGLw-devel-8.0.0-5.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-ati-19.0.1-2.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-vesa-2.4.0-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-wacom-0.36.1-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-drv-wacom-devel-0.36.1-3.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xdmx-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xephyr-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xnest-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xorg-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xvfb-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-Xwayland-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-common-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', 'rpm_spec_vers_cmp':TRUE},
    {'reference':'xorg-x11-server-devel-1.20.4-7.el7', 'cpu':'x86_64', 'release':'7', '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 = 'EL' + 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) {
    if (exists_check) {
        if (rpm_exists(release:_release, rpm:exists_check) && 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++;
    } else {
        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, 'gdm / gdm-devel / gdm-pam-extensions-devel / etc');
}