EulerOS 2.0 SP5 : ntp (EulerOS-SA-2019-1323)

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

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

if (description)
{
  script_id(124450);
  script_version("1.7");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/05/30");

  script_cve_id(
    "CVE-2015-7705",
    "CVE-2015-7850",
    "CVE-2015-7976",
    "CVE-2018-7185"
  );

  script_name(english:"EulerOS 2.0 SP5 : ntp (EulerOS-SA-2019-1323)");

  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 :

  - The rate limiting feature in NTP 4.x before 4.2.8p4 and
    4.3.x before 4.3.77 allows remote attackers to have
    unspecified impact via a large number of crafted
    requests.

  - Mitigation:Do not add the 'limited' configuration
    option to any restrict lines in the ntp.conf
    file.(CVE-2015-7705)

  - The protocol engine in ntp 4.2.6 before 4.2.8p11 allows
    a remote attackers to cause a denial of service
    (disruption) by continually sending a packet with a
    zero-origin timestamp and source IP address of the
    'other side' of an interleaved association causing the
    victim ntpd to reset its association(CVE-2018-7185)

  - The ntpq saveconfig command in NTP 4.1.2, 4.2.x before
    4.2.8p6, 4.3, 4.3.25, 4.3.70, and 4.3.77 does not
    properly filter special characters, which allows
    attackers to cause unspecified impact via a crafted
    filename.(CVE-2015-7976)

  - ntpd in NTP 4.2.x before 4.2.8p4, and 4.3.x before
    4.3.77 allows remote authenticated users to cause a
    denial of service (infinite loop or crash) by pointing
    the key file at the log file.

  - Mitigation:Disable NTP remote configuration or limit
    this feature to trusted users to effectively mitigate
    this risk(CVE-2015-7850)

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-2019-1323
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4a99aeb5");
  script_set_attribute(attribute:"solution", value:
"Update the affected ntp 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-2015-7705");

  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:"2019/04/20");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/05/01");

  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:"p-cpe:/a:huawei:euleros:sntp");
  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 !~ "^(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 = ["ntp-4.2.6p5-28.h8.eulerosv2r7",
        "ntpdate-4.2.6p5-28.h8.eulerosv2r7",
        "sntp-4.2.6p5-28.h8.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_HOLE,
    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");
}