MiracleLinux 7 : unbound-1.4.20-26.el7 (AXSA:2015-838:01)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Miracle Linux Security Advisory AXSA:2015-838:01.
##

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

if (description)
{
  script_id(289261);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/16");

  script_cve_id("CVE-2014-8602");

  script_name(english:"MiracleLinux 7 : unbound-1.4.20-26.el7 (AXSA:2015-838:01)");

  script_set_attribute(attribute:"synopsis", value:
"The remote MiracleLinux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote MiracleLinux 7 host has packages installed that are affected by a vulnerability as referenced in the
AXSA:2015-838:01 advisory.

    Unbound is a validating, recursive, and caching DNS(SEC) resolver.
    The C implementation of Unbound is developed and maintained by NLnet
    Labs. It is based on ideas and algorithms taken from a java prototype
    developed by Verisign labs, Nominet, Kirei and ep.net.
    Unbound is designed as a set of modular components, so that also
    DNSSEC (secure DNS) validation and stub-resolvers (that do not run
    as a server, but are linked into an application) are easily possible.
    Security issues fixed with this release:
    CVE-2014-8602
    iterator.c in NLnet Labs Unbound before 1.5.1 does not limit
    delegation chaining, which allows remote attackers to cause a denial
    of service (memory and CPU consumption) via a large or infinite number
    of referrals.
    Fixed bugs:
    * Prior to this update, there was a mistake in the time configuration in the cron job invoking unbound-
    anchor to update the root zone key. Consequently, unbound-anchor was invoked once a month instead of every
    day, thus not complying with RFC 5011. The cron job has been replaced with a systemd timer unit that is
    invoked on a daily basis. Now, the root zone key validity is checked daily at a random time within a
    24-hour window, and compliance with RFC 5011 is ensured.
    * Previously, the unbound packages were installing their configuration file for the systemd-tmpfiles
    utility into the /etc/tmpfiles.d/ directory. As a consequence, changes to unbound made by the
    administrator in /etc/tmpfiles.d/ could be overwritten on package reinstallation or update. To fix this
    bug, unbound has been amended to install the configuration file into the /usr/lib/tmpfiles.d/ directory.
    As a result, the system administrator's configuration in /etc/tmpfiles.d/ is preserved, including any
    changes, on package reinstallation or update.
    * The unbound server default configuration included validation of DNS records using the DNSSEC Look-aside
    Validation (DLV) registry. The Internet Systems Consortium (ISC) plans to deprecate the DLV registry
    service as no longer needed, and unbound could execute unnecessary steps. Therefore, the use of the DLV
    registry has been removed from the unbound server default configuration. Now, unbound does not try to
    perform DNS records validation using the DLV registry.

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

Note that Nessus has not tested for this issue 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/6226");
  script_set_attribute(attribute:"solution", value:
"Update the affected unbound and / or unbound-libs packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/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:N/AC:L/PR:N/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-2014-8602");

  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:"Low");

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/12/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/11/30");
  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:unbound");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:unbound-libs");
  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':'unbound-1.4.20-26.el7', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'unbound-libs-1.4.20-26.el7', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'unbound-libs-1.4.20-26.el7', '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, 'unbound / unbound-libs');
}