MiracleLinux 7 : chrony-2.1.1-1.0.1.el7.AXS7 (AXSA:2015-927:01)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Miracle Linux Security Advisory AXSA:2015-927:01.
##

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

if (description)
{
  script_id(289344);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/16");

  script_cve_id("CVE-2015-1821", "CVE-2015-1822", "CVE-2015-1853");

  script_name(english:"MiracleLinux 7 : chrony-2.1.1-1.0.1.el7.AXS7 (AXSA:2015-927:01)");

  script_set_attribute(attribute:"synopsis", value:
"The remote MiracleLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote MiracleLinux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the
AXSA:2015-927:01 advisory.

    A client/server for the Network Time Protocol, this program keeps your
    computer's clock accurate. It was specially designed to support
    systems with intermittent internet connections, but it also works well
    in permanently connected environments. It can use also hardware reference
    clocks, system real-time clock or manual input as time references.
    Security issues fixed with this release:
    CVE-2015-1821
    Heap-based buffer overflow in chrony before 1.31.1 allows remote
    authenticated users to cause a denial of service (chronyd crash) or
    possibly execute arbitrary code by configuring the (1) NTP or (2)
    cmdmon access with a subnet size that is indivisible by four and an
    address with a nonzero bit in the subnet remainder.
    CVE-2015-1822
    chrony before 1.31.1 does not initialize the last next pointer when
    saving unacknowledged replies to command requests, which allows remote
    authenticated users to cause a denial of service (uninitialized
    pointer dereference and daemon crash) or possibly execute arbitrary
    code via a large number of command requests.
    CVE-2015-1853
    ** RESERVED **
    This candidate has been reserved by an organization or individual that
    will use it when announcing a new security problem.  When the
    candidate has been publicized, the details for this candidate will be
    provided.
    Fixed bugs:
    * Updated to NTP version 4 (RFC 5905)
    * Added pool directive to specify pool of NTP servers
    * Added leapsecmode directive to select how to correct clock for leap second
    * Added smoothtime directive to smooth served time and enable leap smear
    * Added asynchronous name resolving with POSIX threads
    * Ready for year 2036 (next NTP era)
    * Improved clock control
    * Networking code reworked to open separate client sockets for each NTP server
    Fixed bugs:
    * The chronyd service previously assumed that network interfaces specified with the bindaddress
    directive were ready when the service was started. This could cause chronyd to fail to bind an NTP server
    socket to the interface if the interface was not ready. With this update, chronyd uses the IP_FREEBIND
    socket option, enabling it to bind to an interface later, not only when the service starts.
    Enhancements:
    * The chronyd service now supports four modes of handling leap seconds, configured using the leapsecmode
    option. The clock can be either stepped by the kernel (the default system mode), stepped by chronyd
    (step mode), slowly adjusted by slewing (slew mode), or the leap second can be ignored and corrected
    later in normal operation (ignore mode). If you select slewing, the correction will always start at
    00:00:00 UTC and will be applied at a rate specified in the maxslewrate option.

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

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://tsn.miraclelinux.com/en/node/6316");
  script_set_attribute(attribute:"solution", value:
"Update the affected chrony package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/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: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-2015-1822");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2015-1853");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/04/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/12/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/01/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:chrony");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:miracle:linux:7");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || 'MIRACLE LINUX' >!< os_product) audit(AUDIT_OS_NOT, 'MIRACLE LINUX');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'MIRACLE LINUX');
if (! preg(pattern:"^7([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'MiracleLinux 7.x', 'MIRACLE LINUX ' + os_version);

if (!get_kb_item('Host/MiracleLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'ppc' >!< cpu && 's390' >!< cpu && 'x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'MIRACLE LINUX', cpu);

var constraints = [
  {
    'release': '7',
    'pkgs': [
      {'reference':'chrony-2.1.1-1.0.1.el7.AXS7', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) 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, 'chrony');
}