SUSE SLES12 Security Update : libxkbcommon (SUSE-SU-2024:0037-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# SUSE update advisory SUSE-SU-2024:0037-1. The text itself
# is copyright (C) SUSE.
##

include('compat.inc');

if (description)
{
  script_id(187661);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/01/06");

  script_cve_id(
    "CVE-2018-15853",
    "CVE-2018-15854",
    "CVE-2018-15855",
    "CVE-2018-15856",
    "CVE-2018-15857",
    "CVE-2018-15858",
    "CVE-2018-15859",
    "CVE-2018-15861",
    "CVE-2018-15862",
    "CVE-2018-15863",
    "CVE-2018-15864"
  );
  script_xref(name:"SuSE", value:"SUSE-SU-2024:0037-1");

  script_name(english:"SUSE SLES12 Security Update : libxkbcommon (SUSE-SU-2024:0037-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote SUSE host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as
referenced in the SUSE-SU-2024:0037-1 advisory.

  - 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 geometry tokens were
    desupported incorrectly. (CVE-2018-15854)

  - 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 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)

  - 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 when handling invalid aliases in CopyKeyAliasesToKeymap in xkbcomp/keycodes.c
    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. (CVE-2018-15858)

  - 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 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 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)

  - 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://bugzilla.suse.com/1105832");
  # https://lists.suse.com/pipermail/sle-security-updates/2024-January/017591.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?8ac1cdcd");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15853");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15854");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15855");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15856");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15857");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15858");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15859");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15861");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15862");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15863");
  script_set_attribute(attribute:"see_also", value:"https://www.suse.com/security/cve/CVE-2018-15864");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/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: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-2018-15857");

  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:"2018/08/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/01/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/01/06");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxkbcommon-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxkbcommon-x11-0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxkbcommon-x11-0-32bit");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxkbcommon-x11-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxkbcommon0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:libxkbcommon0-32bit");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:12");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"SuSE 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/cpu", "Host/SuSE/release", "Host/SuSE/rpm-list");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item("Host/SuSE/release");
if (isnull(os_release) || os_release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
var os_ver = pregmatch(pattern: "^(SLE(S|D)(?:_SAP)?\d+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'SUSE');
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES12|SLES_SAP12)$", string:os_ver)) audit(AUDIT_OS_NOT, 'SUSE SLES12 / SLES_SAP12', 'SUSE (' + os_ver + ')');

if (!get_kb_item("Host/SuSE/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, 'SUSE (' + os_ver + ')', cpu);

var service_pack = get_kb_item("Host/SuSE/patchlevel");
if (isnull(service_pack)) service_pack = "0";
if (os_ver == "SLES12" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES12 SP5", os_ver + " SP" + service_pack);
if (os_ver == "SLES_SAP12" && (! preg(pattern:"^(5)$", string:service_pack))) audit(AUDIT_OS_NOT, "SLES_SAP12 SP5", os_ver + " SP" + service_pack);

var pkgs = [
    {'reference':'libxkbcommon-devel-0.6.1-9.3.1', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'libxkbcommon-x11-0-0.6.1-9.3.1', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'libxkbcommon-x11-0-32bit-0.6.1-9.3.1', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'libxkbcommon-x11-devel-0.6.1-9.3.1', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'libxkbcommon0-0.6.1-9.3.1', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'libxkbcommon0-32bit-0.6.1-9.3.1', 'sp':'5', 'release':'SLES_SAP12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['SLES_SAP-release-12.5']},
    {'reference':'libxkbcommon-devel-0.6.1-9.3.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-sdk-release-12.5', 'sles-release-12.5']},
    {'reference':'libxkbcommon-x11-devel-0.6.1-9.3.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sle-sdk-release-12.5', 'sles-release-12.5']},
    {'reference':'libxkbcommon-x11-0-0.6.1-9.3.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'libxkbcommon-x11-0-32bit-0.6.1-9.3.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'libxkbcommon0-0.6.1-9.3.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']},
    {'reference':'libxkbcommon0-32bit-0.6.1-9.3.1', 'sp':'5', 'release':'SLES12', 'rpm_spec_vers_cmp':TRUE, 'exists_check':['sles-release-12.5']}
];

var ltss_caveat_required = FALSE;
var flag = 0;
foreach var package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var exists_check = NULL;
  var rpm_spec_vers_cmp = 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['exists_check'])) exists_check = package_array['exists_check'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (reference && _release) {
    if (exists_check) {
      var check_flag = 0;
      foreach var check (exists_check) {
        if (!rpm_exists(release:_release, rpm:check)) continue;
        check_flag++;
      }
      if (!check_flag) continue;
    }
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, rpm_spec_vers_cmp:rpm_spec_vers_cmp)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      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, 'libxkbcommon-devel / libxkbcommon-x11-0 / libxkbcommon-x11-0-32bit / etc');
}