RHEL 6 : xinetd (RHSA-2013:0499)

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Red Hat Security Advisory RHSA-2013:0499. The text 
# itself is copyright (C) Red Hat, Inc.
#

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

if (description)
{
  script_id(64751);
  script_version("1.17");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/11/04");

  script_cve_id("CVE-2012-0862");
  script_bugtraq_id(53720);
  script_xref(name:"RHSA", value:"2013:0499");

  script_name(english:"RHEL 6 : xinetd (RHSA-2013:0499)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing a security update for xinetd.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has a package installed that is affected by a vulnerability as referenced in
the RHSA-2013:0499 advisory.

    The xinetd package provides a secure replacement for inetd, the Internet
    services daemon. xinetd provides access control for all services based on
    the address of the remote host and/or on time of access, and can prevent
    denial-of-access attacks.

    When xinetd services are configured with the TCPMUX or TCPMUXPLUS type,
    and the tcpmux-server service is enabled, those services are accessible via
    port 1. It was found that enabling the tcpmux-server service (it is
    disabled by default) allowed every xinetd service, including those that are
    not configured with the TCPMUX or TCPMUXPLUS type, to be accessible via
    port 1. This could allow a remote attacker to bypass intended firewall
    restrictions. (CVE-2012-0862)

    Red Hat would like to thank Thomas Swan of FedEx for reporting this issue.

    This update also fixes the following bugs:

    * Prior to this update, a file descriptor array in the service.c source
    file was not handled as expected. As a consequence, some of the descriptors
    remained open when xinetd was under heavy load. Additionally, the system
    log was filled with a large number of messages that took up a lot of disk
    space over time. This update modifies the xinetd code to handle the file
    descriptors correctly and messages no longer fill the system log.
    (BZ#790036)

    * Prior to this update, services were disabled permanently when their CPS
    limit was reached. As a consequence, a failed bind operation could occur
    when xinetd attempted to restart the service. This update adds additional
    logic that attempts to restart the service. Now, the service is only
    disabled if xinetd cannot restart the service after 30 attempts.
    (BZ#809271)

    All users of xinetd are advised to upgrade to this updated package, which
    contains backported patches to correct these issues.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  # https://access.redhat.com/security/data/csaf/v2/advisories/2013/rhsa-2013_0499.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?cd5992c5");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2013:0499");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#low");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=790036");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=790940");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL xinetd package based on the guidance in RHSA-2013:0499.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");
  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-2012-0862");

  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:"2012/06/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2013/02/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/02/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:xinetd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:6");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Red Hat Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2013-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '6')) audit(AUDIT_OS_NOT, 'Red Hat 6.x', 'Red Hat ' + os_ver);

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

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

var constraints = [
  {
    'repo_relative_urls': [
      'content/dist/rhel/client/6/6Client/i386/debug',
      'content/dist/rhel/client/6/6Client/i386/optional/debug',
      'content/dist/rhel/client/6/6Client/i386/optional/os',
      'content/dist/rhel/client/6/6Client/i386/optional/source/SRPMS',
      'content/dist/rhel/client/6/6Client/i386/os',
      'content/dist/rhel/client/6/6Client/i386/source/SRPMS',
      'content/dist/rhel/client/6/6Client/x86_64/debug',
      'content/dist/rhel/client/6/6Client/x86_64/optional/debug',
      'content/dist/rhel/client/6/6Client/x86_64/optional/os',
      'content/dist/rhel/client/6/6Client/x86_64/optional/source/SRPMS',
      'content/dist/rhel/client/6/6Client/x86_64/os',
      'content/dist/rhel/client/6/6Client/x86_64/source/SRPMS',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/debug',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/optional/debug',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/optional/os',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/optional/source/SRPMS',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/os',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/scalablefilesystem/debug',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/scalablefilesystem/os',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/scalablefilesystem/source/SRPMS',
      'content/dist/rhel/computenode/6/6ComputeNode/x86_64/source/SRPMS',
      'content/dist/rhel/power/6/6Server/ppc64/debug',
      'content/dist/rhel/power/6/6Server/ppc64/optional/debug',
      'content/dist/rhel/power/6/6Server/ppc64/optional/os',
      'content/dist/rhel/power/6/6Server/ppc64/optional/source/SRPMS',
      'content/dist/rhel/power/6/6Server/ppc64/os',
      'content/dist/rhel/power/6/6Server/ppc64/source/SRPMS',
      'content/dist/rhel/server/6/6Server/i386/debug',
      'content/dist/rhel/server/6/6Server/i386/highavailability/debug',
      'content/dist/rhel/server/6/6Server/i386/highavailability/os',
      'content/dist/rhel/server/6/6Server/i386/highavailability/source/SRPMS',
      'content/dist/rhel/server/6/6Server/i386/loadbalancer/debug',
      'content/dist/rhel/server/6/6Server/i386/loadbalancer/os',
      'content/dist/rhel/server/6/6Server/i386/loadbalancer/source/SRPMS',
      'content/dist/rhel/server/6/6Server/i386/optional/debug',
      'content/dist/rhel/server/6/6Server/i386/optional/os',
      'content/dist/rhel/server/6/6Server/i386/optional/source/SRPMS',
      'content/dist/rhel/server/6/6Server/i386/os',
      'content/dist/rhel/server/6/6Server/i386/resilientstorage/debug',
      'content/dist/rhel/server/6/6Server/i386/resilientstorage/os',
      'content/dist/rhel/server/6/6Server/i386/resilientstorage/source/SRPMS',
      'content/dist/rhel/server/6/6Server/i386/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/debug',
      'content/dist/rhel/server/6/6Server/x86_64/highavailability/debug',
      'content/dist/rhel/server/6/6Server/x86_64/highavailability/os',
      'content/dist/rhel/server/6/6Server/x86_64/highavailability/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/loadbalancer/debug',
      'content/dist/rhel/server/6/6Server/x86_64/loadbalancer/os',
      'content/dist/rhel/server/6/6Server/x86_64/loadbalancer/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/optional/debug',
      'content/dist/rhel/server/6/6Server/x86_64/optional/os',
      'content/dist/rhel/server/6/6Server/x86_64/optional/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/os',
      'content/dist/rhel/server/6/6Server/x86_64/resilientstorage/debug',
      'content/dist/rhel/server/6/6Server/x86_64/resilientstorage/os',
      'content/dist/rhel/server/6/6Server/x86_64/resilientstorage/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/scalablefilesystem/debug',
      'content/dist/rhel/server/6/6Server/x86_64/scalablefilesystem/os',
      'content/dist/rhel/server/6/6Server/x86_64/scalablefilesystem/source/SRPMS',
      'content/dist/rhel/server/6/6Server/x86_64/source/SRPMS',
      'content/dist/rhel/system-z/6/6Server/s390x/debug',
      'content/dist/rhel/system-z/6/6Server/s390x/optional/debug',
      'content/dist/rhel/system-z/6/6Server/s390x/optional/os',
      'content/dist/rhel/system-z/6/6Server/s390x/optional/source/SRPMS',
      'content/dist/rhel/system-z/6/6Server/s390x/os',
      'content/dist/rhel/system-z/6/6Server/s390x/source/SRPMS',
      'content/dist/rhel/workstation/6/6Workstation/i386/debug',
      'content/dist/rhel/workstation/6/6Workstation/i386/optional/debug',
      'content/dist/rhel/workstation/6/6Workstation/i386/optional/os',
      'content/dist/rhel/workstation/6/6Workstation/i386/optional/source/SRPMS',
      'content/dist/rhel/workstation/6/6Workstation/i386/os',
      'content/dist/rhel/workstation/6/6Workstation/i386/source/SRPMS',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/debug',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/optional/debug',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/optional/os',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/optional/source/SRPMS',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/os',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/scalablefilesystem/debug',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/scalablefilesystem/os',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/scalablefilesystem/source/SRPMS',
      'content/dist/rhel/workstation/6/6Workstation/x86_64/source/SRPMS',
      'content/fastrack/rhel/client/6/i386/debug',
      'content/fastrack/rhel/client/6/i386/optional/debug',
      'content/fastrack/rhel/client/6/i386/optional/os',
      'content/fastrack/rhel/client/6/i386/optional/source/SRPMS',
      'content/fastrack/rhel/client/6/i386/os',
      'content/fastrack/rhel/client/6/i386/source/SRPMS',
      'content/fastrack/rhel/client/6/x86_64/debug',
      'content/fastrack/rhel/client/6/x86_64/optional/debug',
      'content/fastrack/rhel/client/6/x86_64/optional/os',
      'content/fastrack/rhel/client/6/x86_64/optional/source/SRPMS',
      'content/fastrack/rhel/client/6/x86_64/os',
      'content/fastrack/rhel/client/6/x86_64/source/SRPMS',
      'content/fastrack/rhel/computenode/6/x86_64/debug',
      'content/fastrack/rhel/computenode/6/x86_64/optional/debug',
      'content/fastrack/rhel/computenode/6/x86_64/optional/os',
      'content/fastrack/rhel/computenode/6/x86_64/optional/source/SRPMS',
      'content/fastrack/rhel/computenode/6/x86_64/os',
      'content/fastrack/rhel/computenode/6/x86_64/scalablefilesystem/debug',
      'content/fastrack/rhel/computenode/6/x86_64/scalablefilesystem/os',
      'content/fastrack/rhel/computenode/6/x86_64/scalablefilesystem/source/SRPMS',
      'content/fastrack/rhel/computenode/6/x86_64/source/SRPMS',
      'content/fastrack/rhel/power/6/ppc64/debug',
      'content/fastrack/rhel/power/6/ppc64/optional/debug',
      'content/fastrack/rhel/power/6/ppc64/optional/os',
      'content/fastrack/rhel/power/6/ppc64/optional/source/SRPMS',
      'content/fastrack/rhel/power/6/ppc64/os',
      'content/fastrack/rhel/power/6/ppc64/source/SRPMS',
      'content/fastrack/rhel/server/6/i386/debug',
      'content/fastrack/rhel/server/6/i386/highavailability/debug',
      'content/fastrack/rhel/server/6/i386/highavailability/os',
      'content/fastrack/rhel/server/6/i386/highavailability/source/SRPMS',
      'content/fastrack/rhel/server/6/i386/loadbalancer/debug',
      'content/fastrack/rhel/server/6/i386/loadbalancer/os',
      'content/fastrack/rhel/server/6/i386/loadbalancer/source/SRPMS',
      'content/fastrack/rhel/server/6/i386/optional/debug',
      'content/fastrack/rhel/server/6/i386/optional/os',
      'content/fastrack/rhel/server/6/i386/optional/source/SRPMS',
      'content/fastrack/rhel/server/6/i386/os',
      'content/fastrack/rhel/server/6/i386/resilientstorage/debug',
      'content/fastrack/rhel/server/6/i386/resilientstorage/os',
      'content/fastrack/rhel/server/6/i386/resilientstorage/source/SRPMS',
      'content/fastrack/rhel/server/6/i386/source/SRPMS',
      'content/fastrack/rhel/server/6/x86_64/debug',
      'content/fastrack/rhel/server/6/x86_64/highavailability/debug',
      'content/fastrack/rhel/server/6/x86_64/highavailability/os',
      'content/fastrack/rhel/server/6/x86_64/highavailability/source/SRPMS',
      'content/fastrack/rhel/server/6/x86_64/loadbalancer/debug',
      'content/fastrack/rhel/server/6/x86_64/loadbalancer/os',
      'content/fastrack/rhel/server/6/x86_64/loadbalancer/source/SRPMS',
      'content/fastrack/rhel/server/6/x86_64/optional/debug',
      'content/fastrack/rhel/server/6/x86_64/optional/os',
      'content/fastrack/rhel/server/6/x86_64/optional/source/SRPMS',
      'content/fastrack/rhel/server/6/x86_64/os',
      'content/fastrack/rhel/server/6/x86_64/resilientstorage/debug',
      'content/fastrack/rhel/server/6/x86_64/resilientstorage/os',
      'content/fastrack/rhel/server/6/x86_64/resilientstorage/source/SRPMS',
      'content/fastrack/rhel/server/6/x86_64/scalablefilesystem/debug',
      'content/fastrack/rhel/server/6/x86_64/scalablefilesystem/os',
      'content/fastrack/rhel/server/6/x86_64/scalablefilesystem/source/SRPMS',
      'content/fastrack/rhel/server/6/x86_64/source/SRPMS',
      'content/fastrack/rhel/system-z/6/s390x/debug',
      'content/fastrack/rhel/system-z/6/s390x/optional/debug',
      'content/fastrack/rhel/system-z/6/s390x/optional/os',
      'content/fastrack/rhel/system-z/6/s390x/optional/source/SRPMS',
      'content/fastrack/rhel/system-z/6/s390x/os',
      'content/fastrack/rhel/system-z/6/s390x/source/SRPMS',
      'content/fastrack/rhel/workstation/6/i386/debug',
      'content/fastrack/rhel/workstation/6/i386/optional/debug',
      'content/fastrack/rhel/workstation/6/i386/optional/os',
      'content/fastrack/rhel/workstation/6/i386/optional/source/SRPMS',
      'content/fastrack/rhel/workstation/6/i386/os',
      'content/fastrack/rhel/workstation/6/i386/source/SRPMS',
      'content/fastrack/rhel/workstation/6/x86_64/debug',
      'content/fastrack/rhel/workstation/6/x86_64/optional/debug',
      'content/fastrack/rhel/workstation/6/x86_64/optional/os',
      'content/fastrack/rhel/workstation/6/x86_64/optional/source/SRPMS',
      'content/fastrack/rhel/workstation/6/x86_64/os',
      'content/fastrack/rhel/workstation/6/x86_64/scalablefilesystem/debug',
      'content/fastrack/rhel/workstation/6/x86_64/scalablefilesystem/os',
      'content/fastrack/rhel/workstation/6/x86_64/scalablefilesystem/source/SRPMS',
      'content/fastrack/rhel/workstation/6/x86_64/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'xinetd-2.3.14-38.el6', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'xinetd-2.3.14-38.el6', 'cpu':'ppc64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'xinetd-2.3.14-38.el6', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'xinetd-2.3.14-38.el6', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];
  foreach var pkg ( constraint_array['pkgs'] ) {
    var reference = NULL;
    var _release = NULL;
    var sp = NULL;
    var _cpu = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var epoch = NULL;
    var allowmaj = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    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 &&
        _release &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!exists_check || rpm_exists(release:_release, rpm:exists_check))) &&
        rpm_check(release:_release, 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)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'xinetd');
}