EulerOS 2.0 SP5 : libxkbcommon (EulerOS-SA-2020-2554)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#

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

if (description)
{
  script_id(144269);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/02/01");

  script_cve_id("CVE-2018-15854", "CVE-2018-15855", "CVE-2018-15856");

  script_name(english:"EulerOS 2.0 SP5 : libxkbcommon (EulerOS-SA-2020-2554)");

  script_set_attribute(attribute:"synopsis", value:
"The remote EulerOS host is missing multiple security updates.");
  script_set_attribute(attribute:"description", value:
"According to the versions of the libxkbcommon packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :

  - 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)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.");
  # https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2020-2554
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?d8d6f171");
  script_set_attribute(attribute:"solution", value:
"Update the affected libxkbcommon packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:N/I:N/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:N/I:N/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-2018-15856");

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

  script_set_attribute(attribute:"patch_publication_date", value:"2020/12/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2020/12/15");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxkbcommon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxkbcommon-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:libxkbcommon-x11");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:huawei:euleros:2.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2020-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/EulerOS/release", "Host/EulerOS/rpm-list", "Host/EulerOS/sp");
  script_exclude_keys("Host/EulerOS/uvp_version");

  exit(0);
}

include("audit.inc");
include("global_settings.inc");
include("rpm.inc");

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

release = get_kb_item("Host/EulerOS/release");
if (isnull(release) || release !~ "^EulerOS") audit(AUDIT_OS_NOT, "EulerOS");
if (release !~ "^EulerOS release 2\.0(\D|$)") audit(AUDIT_OS_NOT, "EulerOS 2.0");

sp = get_kb_item("Host/EulerOS/sp");
if (isnull(sp) || sp !~ "^(5)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP5", "EulerOS UVP " + uvp);

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

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$" && "aarch64" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "EulerOS", cpu);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_ARCH_NOT, "i686 / x86_64", cpu);

flag = 0;

pkgs = ["libxkbcommon-0.7.1-1.h3.eulerosv2r7",
        "libxkbcommon-devel-0.7.1-1.h3.eulerosv2r7",
        "libxkbcommon-x11-0.7.1-1.h3.eulerosv2r7"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"5", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_NOTE,
    extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libxkbcommon");
}