The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2016:1552 advisory.
ntp: off-path denial of service on authenticated broadcast mode (CVE-2015-7979)
ntp: crypto-NAK preemptable association denial of service (CVE-2016-1547)
ntp: ntpd switching to interleaved mode with spoofed packets (CVE-2016-1548)
ntp: libntp message digest disclosure (CVE-2016-1550)
ntp: out-of-bounds references on crafted packet (CVE-2016-2518)
Note that Nessus has not tested for these issues but has instead relied only on the application’s self-reported version number.
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2016:1552. The text
# itself is copyright (C) Red Hat, Inc.
#
include('compat.inc');
if (description)
{
script_id(92718);
script_version("2.12");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/04/24");
script_cve_id(
"CVE-2015-7979",
"CVE-2016-1547",
"CVE-2016-1548",
"CVE-2016-1550",
"CVE-2016-2518"
);
script_xref(name:"RHSA", value:"2016:1552");
script_name(english:"RHEL 6 : ntp (RHSA-2016:1552)");
script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for ntp.");
script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 6 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2016:1552 advisory.
- ntp: off-path denial of service on authenticated broadcast mode (CVE-2015-7979)
- ntp: crypto-NAK preemptable association denial of service (CVE-2016-1547)
- ntp: ntpd switching to interleaved mode with spoofed packets (CVE-2016-1548)
- ntp: libntp message digest disclosure (CVE-2016-1550)
- ntp: out-of-bounds references on crafted packet (CVE-2016-2518)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version
number.");
# https://access.redhat.com/security/data/csaf/v2/advisories/2016/rhsa-2016_1552.json
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?ef98b388");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2016:1552");
script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/security/updates/classification/#moderate");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1300271");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1331461");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1331462");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1331464");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=1331468");
script_set_attribute(attribute:"solution", value:
"Update the RHEL ntp package based on the guidance in RHSA-2016:1552.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:P");
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:C/C:N/I:L/A:L");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-1548");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_cwe_id(20);
script_set_attribute(attribute:"vendor_severity", value:"Moderate");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/01/06");
script_set_attribute(attribute:"patch_publication_date", value:"2016/08/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ntp");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ntp-doc");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ntp-perl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:ntpdate");
script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:rhel_eus:6.7");
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) 2016-2024 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: 'eq', os_version: os_ver, rhel_version: '6.7')) audit(AUDIT_OS_NOT, 'Red Hat 6.7', '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/eus/rhel/computenode/6/6.7/x86_64/debug',
'content/eus/rhel/computenode/6/6.7/x86_64/optional/debug',
'content/eus/rhel/computenode/6/6.7/x86_64/optional/os',
'content/eus/rhel/computenode/6/6.7/x86_64/optional/source/SRPMS',
'content/eus/rhel/computenode/6/6.7/x86_64/os',
'content/eus/rhel/computenode/6/6.7/x86_64/sfs/debug',
'content/eus/rhel/computenode/6/6.7/x86_64/sfs/os',
'content/eus/rhel/computenode/6/6.7/x86_64/sfs/source/SRPMS',
'content/eus/rhel/computenode/6/6.7/x86_64/source/SRPMS',
'content/eus/rhel/power/6/6.7/ppc64/debug',
'content/eus/rhel/power/6/6.7/ppc64/optional/debug',
'content/eus/rhel/power/6/6.7/ppc64/optional/os',
'content/eus/rhel/power/6/6.7/ppc64/optional/source/SRPMS',
'content/eus/rhel/power/6/6.7/ppc64/os',
'content/eus/rhel/power/6/6.7/ppc64/source/SRPMS',
'content/eus/rhel/server/6/6.7/i386/debug',
'content/eus/rhel/server/6/6.7/i386/highavailability/debug',
'content/eus/rhel/server/6/6.7/i386/highavailability/os',
'content/eus/rhel/server/6/6.7/i386/highavailability/source/SRPMS',
'content/eus/rhel/server/6/6.7/i386/loadbalancer/debug',
'content/eus/rhel/server/6/6.7/i386/loadbalancer/os',
'content/eus/rhel/server/6/6.7/i386/loadbalancer/source/SRPMS',
'content/eus/rhel/server/6/6.7/i386/optional/debug',
'content/eus/rhel/server/6/6.7/i386/optional/os',
'content/eus/rhel/server/6/6.7/i386/optional/source/SRPMS',
'content/eus/rhel/server/6/6.7/i386/os',
'content/eus/rhel/server/6/6.7/i386/resilientstorage/debug',
'content/eus/rhel/server/6/6.7/i386/resilientstorage/os',
'content/eus/rhel/server/6/6.7/i386/resilientstorage/source/SRPMS',
'content/eus/rhel/server/6/6.7/i386/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/debug',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/debug',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/highavailability/debug',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/highavailability/os',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/highavailability/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/os',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/scalablefilesystem/debug',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/scalablefilesystem/os',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/scalablefilesystem/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/eus-ext/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/highavailability/debug',
'content/eus/rhel/server/6/6.7/x86_64/highavailability/os',
'content/eus/rhel/server/6/6.7/x86_64/highavailability/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/loadbalancer/debug',
'content/eus/rhel/server/6/6.7/x86_64/loadbalancer/os',
'content/eus/rhel/server/6/6.7/x86_64/loadbalancer/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/optional/debug',
'content/eus/rhel/server/6/6.7/x86_64/optional/os',
'content/eus/rhel/server/6/6.7/x86_64/optional/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/os',
'content/eus/rhel/server/6/6.7/x86_64/resilientstorage/debug',
'content/eus/rhel/server/6/6.7/x86_64/resilientstorage/os',
'content/eus/rhel/server/6/6.7/x86_64/resilientstorage/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/sap-hana/debug',
'content/eus/rhel/server/6/6.7/x86_64/sap-hana/os',
'content/eus/rhel/server/6/6.7/x86_64/sap-hana/source/SRPMS',
'content/eus/rhel/server/6/6.7/x86_64/source/SRPMS',
'content/eus/rhel/system-z/6/6.7/s390x/debug',
'content/eus/rhel/system-z/6/6.7/s390x/optional/debug',
'content/eus/rhel/system-z/6/6.7/s390x/optional/os',
'content/eus/rhel/system-z/6/6.7/s390x/optional/source/SRPMS',
'content/eus/rhel/system-z/6/6.7/s390x/os',
'content/eus/rhel/system-z/6/6.7/s390x/source/SRPMS'
],
'pkgs': [
{'reference':'ntp-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'ppc64', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-doc-4.2.6p5-5.el6_7.5', 'sp':'7', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-perl-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-perl-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'ppc64', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-perl-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntp-perl-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntpdate-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'i686', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntpdate-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'ppc64', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntpdate-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'s390x', 'release':'6', 'rpm_spec_vers_cmp':TRUE},
{'reference':'ntpdate-4.2.6p5-5.el6_7.5', 'sp':'7', 'cpu':'x86_64', 'release':'6', 'rpm_spec_vers_cmp':TRUE}
]
}
];
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 subscription_caveat = '\n' +
'NOTE: This vulnerability check contains fixes that apply to\n' +
'packages only available in the Red Hat Enterprise Linux\n' +
'Extended Update Support repository.\n' +
'Access to this repository requires a paid RHEL subscription.\n';
var extra = NULL;
if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = subscription_caveat + rpm_report_get() + redhat_report_repo_caveat();
else extra = subscription_caveat + 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, 'ntp / ntp-doc / ntp-perl / ntpdate');
}
Vendor | Product | Version | CPE |
---|---|---|---|
redhat | enterprise_linux | ntp | p-cpe:/a:redhat:enterprise_linux:ntp |
redhat | enterprise_linux | ntp-doc | p-cpe:/a:redhat:enterprise_linux:ntp-doc |
redhat | enterprise_linux | ntp-perl | p-cpe:/a:redhat:enterprise_linux:ntp-perl |
redhat | enterprise_linux | ntpdate | p-cpe:/a:redhat:enterprise_linux:ntpdate |
redhat | rhel_eus | 6.7 | cpe:/o:redhat:rhel_eus:6.7 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-7979
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1547
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1548
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-1550
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2518
www.nessus.org/u?ef98b388
access.redhat.com/errata/RHSA-2016:1552
access.redhat.com/security/updates/classification/#moderate
bugzilla.redhat.com/show_bug.cgi?id=1300271
bugzilla.redhat.com/show_bug.cgi?id=1331461
bugzilla.redhat.com/show_bug.cgi?id=1331462
bugzilla.redhat.com/show_bug.cgi?id=1331464
bugzilla.redhat.com/show_bug.cgi?id=1331468