EulerOS 2.0 SP2 : ntp (EulerOS-SA-2019-2446)

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

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

if (description)
{
  script_id(131600);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/08");

  script_cve_id("CVE-2015-5146", "CVE-2015-7973", "CVE-2016-2517");
  script_bugtraq_id(75589);

  script_name(english:"EulerOS 2.0 SP2 : ntp (EulerOS-SA-2019-2446)");

  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 ntp packages installed, the EulerOS
installation on the remote host is affected by the following
vulnerabilities :

  - NTP before 4.2.8p7 and 4.3.x before 4.3.92 allows
    remote attackers to cause a denial of service (prevent
    subsequent authentication) by leveraging knowledge of
    the controlkey or requestkey and sending a crafted
    packet to ntpd, which changes the value of trustedkey,
    controlkey, or requestkey. NOTE: this vulnerability
    exists because of a CVE-2016-2516
    regression.(CVE-2016-2517)

  - NTP before 4.2.8p6 and 4.3.x before 4.3.90, when
    configured in broadcast mode, allows man-in-the-middle
    attackers to conduct replay attacks by sniffing the
    network.(CVE-2015-7973)

  - ntpd in ntp before 4.2.8p3 with remote configuration
    enabled allows remote authenticated users with
    knowledge of the configuration password and access to a
    computer entrusted to perform remote configuration to
    cause a denial of service (service crash) via a NULL
    byte in a crafted configuration directive
    packet.(CVE-2015-5146)

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-2019-2446
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?e2a35bb4");
  script_set_attribute(attribute:"solution", value:
"Update the affected ntp packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/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:H/PR:N/UI:N/S:U/C:N/I:L/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-2015-7973");

  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:"2019/12/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/12/04");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ntp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:huawei:euleros:ntpdate");
  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) 2019-2024 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 !~ "^(2)$") audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2");

uvp = get_kb_item("Host/EulerOS/uvp_version");
if (!empty_or_null(uvp)) audit(AUDIT_OS_NOT, "EulerOS 2.0 SP2", "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 = ["ntp-4.2.6p5-25.1.h21",
        "ntpdate-4.2.6p5-25.1.h21"];

foreach (pkg in pkgs)
  if (rpm_check(release:"EulerOS-2.0", sp:"2", reference:pkg)) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    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, "ntp");
}