MiracleLinux 7 : libxml2-2.9.1-6.0.1.el7.AXS7.3 (AXSA:2016-545:01)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# Miracle Linux Security Advisory AXSA:2016-545:01.
##

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

if (description)
{
  script_id(289699);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/16");

  script_cve_id(
    "CVE-2016-1762",
    "CVE-2016-1833",
    "CVE-2016-1834",
    "CVE-2016-1835",
    "CVE-2016-1836",
    "CVE-2016-1837",
    "CVE-2016-1838",
    "CVE-2016-1839",
    "CVE-2016-1840",
    "CVE-2016-3627",
    "CVE-2016-3705",
    "CVE-2016-4447",
    "CVE-2016-4448",
    "CVE-2016-4449"
  );

  script_name(english:"MiracleLinux 7 : libxml2-2.9.1-6.0.1.el7.AXS7.3 (AXSA:2016-545:01)");

  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 packages installed that are affected by multiple vulnerabilities as referenced in the
AXSA:2016-545:01 advisory.

    This library allows to manipulate XML files. It includes support
    to read, modify and write XML and HTML files. There is DTDs support
    this includes parsing and validation even with complex DtDs, either
    at parse time or later once the document has been modified. The output
    can be a simple SAX stream or and in-memory DOM like representations.
    In this case one can use the built-in XPath and XPointer implementation
    to select sub nodes or ranges. A flexible Input/Output mechanism is
    available, with existing HTTP and FTP modules and combined to an
    URI library.
    Security issues fixed with this release:
    CVE-2016-1762
    libxml2 in Apple iOS before 9.3, OS X before 10.11.4, Safari before
    9.1, tvOS before 9.2, and watchOS before 2.2 allows remote attackers
    to execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document.
    CVE-2016-1833
    libxml2, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS
    before 9.2.1, and watchOS before 2.2.1, allows remote attackers to
    execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document, a different vulnerability than
    CVE-2016-1834, CVE-2016-1836, CVE-2016-1837, CVE-2016-1838,
    CVE-2016-1839, and CVE-2016-1840.
    CVE-2016-1834
    libxml2, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS
    before 9.2.1, and watchOS before 2.2.1, allows remote attackers to
    execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document, a different vulnerability than
    CVE-2016-1833, CVE-2016-1836, CVE-2016-1837, CVE-2016-1838,
    CVE-2016-1839, and CVE-2016-1840.
    CVE-2016-1835
    libxml2, as used in Apple iOS before 9.3.2 and OS X before 10.11.5,
    allows remote attackers to execute arbitrary code or cause a denial of
    service (memory corruption) via a crafted XML document.
    CVE-2016-1836
    libxml2, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS
    before 9.2.1, and watchOS before 2.2.1, allows remote attackers to
    execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document, a different vulnerability than
    CVE-2016-1833, CVE-2016-1834, CVE-2016-1837, CVE-2016-1838,
    CVE-2016-1839, and CVE-2016-1840.
    CVE-2016-1837
    libxml2, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS
    before 9.2.1, and watchOS before 2.2.1, allows remote attackers to
    execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document, a different vulnerability than
    CVE-2016-1833, CVE-2016-1834, CVE-2016-1836, CVE-2016-1838,
    CVE-2016-1839, and CVE-2016-1840.
    CVE-2016-1838
    libxml2, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS
    before 9.2.1, and watchOS before 2.2.1, allows remote attackers to
    execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document, a different vulnerability than
    CVE-2016-1833, CVE-2016-1834, CVE-2016-1836, CVE-2016-1837,
    CVE-2016-1839, and CVE-2016-1840.
    CVE-2016-1839
    libxml2, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS
    before 9.2.1, and watchOS before 2.2.1, allows remote attackers to
    execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document, a different vulnerability than
    CVE-2016-1833, CVE-2016-1834, CVE-2016-1836, CVE-2016-1837,
    CVE-2016-1838, and CVE-2016-1840.
    CVE-2016-1840
    libxml2, as used in Apple iOS before 9.3.2, OS X before 10.11.5, tvOS
    before 9.2.1, and watchOS before 2.2.1, allows remote attackers to
    execute arbitrary code or cause a denial of service (memory
    corruption) via a crafted XML document, a different vulnerability than
    CVE-2016-1833, CVE-2016-1834, CVE-2016-1836, CVE-2016-1837,
    CVE-2016-1838, and CVE-2016-1839.
    CVE-2016-3627
    The xmlStringGetNodeList function in tree.c in libxml2 2.9.3 and
    earlier, when used in recovery mode, allows context-dependent
    attackers to cause a denial of service (infinite recursion, stack
    consumption, and application crash) via a crafted XML document.
    CVE-2016-3705
    The (1) xmlParserEntityCheck and (2) xmlParseAttValueComplex functions
    in parser.c in libxml2 2.9.3 do not properly keep track of the
    recursion depth, which allows context-dependent attackers to cause a
    denial of service (stack consumption and application crash) via a
    crafted XML document containing a large number of nested entity
    references.
    CVE-2016-4447
    The xmlParseElementDecl function in parser.c in libxml2 before 2.9.4
    allows context-dependent attackers to cause a denial of service
    (heap-based buffer underread and application crash) via a crafted
    file, involving xmlParseName.
    CVE-2016-4448
    Format string vulnerability in libxml2 before 2.9.4 allows attackers
    to have unspecified impact via format string specifiers in unknown
    vectors.
    CVE-2016-4449
    XML external entity (XXE) vulnerability in the
    xmlStringLenDecodeEntities function in parser.c in libxml2 before
    2.9.4, when not in validating mode, allows context-dependent attackers
    to read arbitrary files or cause a denial of service (resource
    consumption) via unspecified vectors.

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/6971");
  script_set_attribute(attribute:"solution", value:
"Update the affected libxml2, libxml2-devel and / or libxml2-python packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-4448");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_set_attribute(attribute:"vendor_severity", value:"High");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/03/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/07/11");
  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:libxml2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:libxml2-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:miracle:linux:libxml2-python");
  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':'libxml2-2.9.1-6.0.1.el7.AXS7.3', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libxml2-2.9.1-6.0.1.el7.AXS7.3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libxml2-devel-2.9.1-6.0.1.el7.AXS7.3', 'cpu':'i686', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libxml2-devel-2.9.1-6.0.1.el7.AXS7.3', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libxml2-python-2.9.1-6.0.1.el7.AXS7.3', '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_HOLE,
      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, 'libxml2 / libxml2-devel / libxml2-python');
}