Vulnerabilities > CVE-2017-6460 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in NTP

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Slackware Security Advisory 2017-112-02. The text 
# itself is copyright (C) Slackware Linux, Inc.
#

include("compat.inc");

if (description)
{
  script_id(99597);
  script_version("$Revision: 3.4 $");
  script_cvs_date("$Date: 2018/01/26 17:50:31 $");

  script_cve_id("CVE-2016-9042", "CVE-2017-6451", "CVE-2017-6452", "CVE-2017-6455", "CVE-2017-6458", "CVE-2017-6459", "CVE-2017-6460", "CVE-2017-6462", "CVE-2017-6463", "CVE-2017-6464");
  script_xref(name:"SSA", value:"2017-112-02");

  script_name(english:"Slackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : ntp (SSA:2017-112-02)");
  script_summary(english:"Checks for updated package in /var/log/packages");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Slackware host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"New ntp packages are available for Slackware 13.0, 13.1, 13.37, 14.0,
14.1, 14.2, and -current to fix security issues."
  );
  # http://www.slackware.com/security/viewer.php?l=slackware-security&y=2017&m=slackware-security.648848
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?7a77564e"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected ntp package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:slackware:slackware_linux:ntp");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:13.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:13.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:13.37");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.1");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:slackware:slackware_linux:14.2");

  script_set_attribute(attribute:"patch_publication_date", value:"2017/04/22");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/24");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2018 Tenable Network Security, Inc.");
  script_family(english:"Slackware Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Slackware/release", "Host/Slackware/packages");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("slackware.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Slackware/release")) audit(AUDIT_OS_NOT, "Slackware");
if (!get_kb_item("Host/Slackware/packages")) audit(AUDIT_PACKAGE_LIST_MISSING);


cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Slackware", cpu);


flag = 0;
if (slackware_check(osver:"13.0", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"i486", pkgnum:"1_slack13.0")) flag++;
if (slackware_check(osver:"13.0", arch:"x86_64", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"x86_64", pkgnum:"1_slack13.0")) flag++;

if (slackware_check(osver:"13.1", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"i486", pkgnum:"1_slack13.1")) flag++;
if (slackware_check(osver:"13.1", arch:"x86_64", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"x86_64", pkgnum:"1_slack13.1")) flag++;

if (slackware_check(osver:"13.37", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"i486", pkgnum:"1_slack13.37")) flag++;
if (slackware_check(osver:"13.37", arch:"x86_64", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"x86_64", pkgnum:"1_slack13.37")) flag++;

if (slackware_check(osver:"14.0", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"i486", pkgnum:"1_slack14.0")) flag++;
if (slackware_check(osver:"14.0", arch:"x86_64", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"x86_64", pkgnum:"1_slack14.0")) flag++;

if (slackware_check(osver:"14.1", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"i486", pkgnum:"1_slack14.1")) flag++;
if (slackware_check(osver:"14.1", arch:"x86_64", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"x86_64", pkgnum:"1_slack14.1")) flag++;

if (slackware_check(osver:"14.2", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"i586", pkgnum:"1_slack14.2")) flag++;
if (slackware_check(osver:"14.2", arch:"x86_64", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"x86_64", pkgnum:"1_slack14.2")) flag++;

if (slackware_check(osver:"current", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"i586", pkgnum:"1")) flag++;
if (slackware_check(osver:"current", arch:"x86_64", pkgname:"ntp", pkgver:"4.2.8p10", pkgarch:"x86_64", pkgnum:"1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:slackware_report_get());
  else security_warning(0);
  exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
  script_id(103222);
  script_version("1.6");
  script_cvs_date("Date: 2018/08/01 13:59:45");

  script_cve_id("CVE-2017-6460");
  script_bugtraq_id(97052);

  script_name(english:"Palo Alto Networks PAN-OS 6.1.x / 7.0.x < 7.0.18 / 7.1.x < 7.1.12 / 8.0.x < 8.0.4 Network Time Protocol Vulnerability");
  script_summary(english:"Checks the PAN-OS version.");

  script_set_attribute(attribute:"synopsis", value:
"The remote PAN-OS host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description",value:
"The version of Palo Alto Networks PAN-OS running on the remote host is
6.1.x, 7.0.x prior to 7.0.18, 7.1.x prior to 7.1.12, or 8.0.x prior to
8.0.4. It is, therefore, affected by a vulnerability in the reslist()
function in ntpq/ntpq-subs.c. An attacker can cause a stack-based
buffer overflow to cause a denial of service or potentially execute
arbitrary code. Note the attacker must be on the management interface
to exploit this vulnerability.");
  # https://www.paloaltonetworks.com/documentation/80/pan-os/pan-os-release-notes/pan-os-8-0-4-addressed-issues
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?639c2b91");
  script_set_attribute(attribute:"see_also", value:"https://securityadvisories.paloaltonetworks.com/Home/Detail/92");
  script_set_attribute(attribute:"solution", value:
"Upgrade to Palo Alto Networks PAN-OS version 7.0.18 / 7.1.12
/ 8.0.4 or later.");
  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:L/I:L/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/09/11");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/09/14");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:paloaltonetworks:pan-os");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Palo Alto Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2017-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("palo_alto_version.nbin");
  script_require_keys("Host/Palo_Alto/Firewall/Version", "Host/Palo_Alto/Firewall/Full_Version");

  exit(0);
}

include("vcf.inc");

app_name = "Palo Alto Networks PAN-OS";

app_info = vcf::get_app_info(app:app_name, kb_ver:"Host/Palo_Alto/Firewall/Full_Version", webapp:true);

vcf::check_granularity(app_info:app_info, sig_segments:2);

constraints = [
  { "min_version" : "6.1", "max_version" : "6.2", "fixed_version" : "7.0.18" },
  { "min_version" : "7.0", "max_version" : "7.0.17", "fixed_version" : "7.0.18" },
  { "min_version" : "7.1", "max_version" : "7.1.11", "fixed_version" : "7.1.12" },
  { "min_version" : "8.0", "max_version" : "8.0.3", "fixed_version" : "8.0.4" }
];

vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from SUSE update advisory SUSE-SU-2017:1052-1.
# The text itself is copyright (C) SUSE.
#

include("compat.inc");

if (description)
{
  script_id(99469);
  script_version("3.12");
  script_cvs_date("Date: 2019/09/11 11:22:15");

  script_cve_id("CVE-2016-9042", "CVE-2017-6451", "CVE-2017-6458", "CVE-2017-6460", "CVE-2017-6462", "CVE-2017-6463", "CVE-2017-6464");

  script_name(english:"SUSE SLES11 Security Update : ntp (SUSE-SU-2017:1052-1)");
  script_summary(english:"Checks rpm output for the updated packages.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote SUSE host is missing one or more security updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"This ntp update to version 4.2.8p10 fixes the following issues:
Security issues fixed (bsc#1030050) :

  - CVE-2017-6464: Denial of Service via Malformed Config

  - CVE-2017-6462: Buffer Overflow in DPTS Clock

  - CVE-2017-6463: Authenticated DoS via Malicious Config
    Option

  - CVE-2017-6458: Potential Overflows in ctl_put()
    functions

  - CVE-2017-6451: Improper use of snprintf() in
    mx4200_send()

  - CVE-2017-6460: Buffer Overflow in ntpq when fetching
    reslist

  - CVE-2016-9042: 0rigin (zero origin) DoS.

  - ntpq_stripquotes() returns incorrect Value

  - ereallocarray()/eallocarray() underused

  - Copious amounts of Unused Code

  - Off-by-one in Oncore GPS Receiver

  - Makefile does not enforce Security Flags Bugfixes :

  - Remove spurious log messages (bsc#1014172).

  - Fixing ppc and ppc64 linker issue (bsc#1031085).

  - clang scan-build findings

  - Support for openssl-1.1.0 without compatibility modes

  - Bugfix 3072 breaks multicastclient

  - forking async worker: interrupted pipe I/O

  - (...) time_pps_create: Exec format error

  - Incorrect Logic for Peer Event Limiting

  - Change the process name of forked DNS worker

  - Trap Configuration Fail

  - Nothing happens if minsane 

  - allow -4/-6 on restrict line with mask

  - out-of-bound pointers in ctl_putsys and decode_bitflags

  - Move ntp-kod to /var/lib/ntp, because /var/db is not a
    standard directory and causes problems for transactional
    updates.

Note that Tenable Network Security has extracted the preceding
description block directly from the SUSE security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1014172"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1030050"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugzilla.suse.com/show_bug.cgi?id=1031085"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2016-9042/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-6451/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-6458/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-6460/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-6462/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-6463/"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.suse.com/security/cve/CVE-2017-6464/"
  );
  # https://www.suse.com/support/update/announcement/2017/suse-su-20171052-1/
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?1dfa73fc"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"To install this SUSE Security Update use YaST online_update.
Alternatively you can run the command listed for your product :

SUSE Linux Enterprise Server 11-SP4:zypper in -t patch
slessp4-ntp-13066=1

SUSE Linux Enterprise Debuginfo 11-SP4:zypper in -t patch
dbgsp4-ntp-13066=1

To bring your system up-to-date, use 'zypper patch'."
  );
  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:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:ntp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:suse_linux:ntp-doc");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:suse_linux:11");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/03/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/04/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/04/19");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"SuSE Local Security Checks");

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

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release !~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "SUSE");
os_ver = pregmatch(pattern: "^(SLE(S|D)\d+)", string:release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, "SUSE");
os_ver = os_ver[1];
if (! preg(pattern:"^(SLES11)$", string:os_ver)) audit(AUDIT_OS_NOT, "SUSE SLES11", "SUSE " + os_ver);

if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^i[3-6]86$" && "x86_64" >!< cpu && "s390x" >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "SUSE " + os_ver, cpu);

sp = get_kb_item("Host/SuSE/patchlevel");
if (isnull(sp)) sp = "0";
if (os_ver == "SLES11" && (! preg(pattern:"^(4)$", string:sp))) audit(AUDIT_OS_NOT, "SLES11 SP4", os_ver + " SP" + sp);


flag = 0;
if (rpm_check(release:"SLES11", sp:"4", reference:"ntp-4.2.8p10-63.1")) flag++;
if (rpm_check(release:"SLES11", sp:"4", reference:"ntp-doc-4.2.8p10-63.1")) flag++;


if (flag)
{
  if (report_verbosity > 0) security_warning(port:0, extra:rpm_report_get());
  else security_warning(0);
  exit(0);
}
else
{
  tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ntp");
}

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-3349-1. The text 
# itself is copyright (C) Canonical, Inc. See 
# <http://www.ubuntu.com/usn/>. Ubuntu(R) is a registered 
# trademark of Canonical, Inc.
#

include("compat.inc");

if (description)
{
  script_id(101263);
  script_version("3.9");
  script_cvs_date("Date: 2019/09/18 12:31:47");

  script_cve_id("CVE-2016-2519", "CVE-2016-7426", "CVE-2016-7427", "CVE-2016-7428", "CVE-2016-7429", "CVE-2016-7431", "CVE-2016-7433", "CVE-2016-7434", "CVE-2016-9042", "CVE-2016-9310", "CVE-2016-9311", "CVE-2017-6458", "CVE-2017-6460", "CVE-2017-6462", "CVE-2017-6463", "CVE-2017-6464");
  script_xref(name:"USN", value:"3349-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 16.10 / 17.04 : ntp vulnerabilities (USN-3349-1)");
  script_summary(english:"Checks dpkg output for updated package.");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Ubuntu host is missing a security-related patch."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Yihan Lian discovered that NTP incorrectly handled certain large
request data values. A remote attacker could possibly use this issue
to cause NTP to crash, resulting in a denial of service. This issue
only affected Ubuntu 16.04 LTS. (CVE-2016-2519)

Miroslav Lichvar discovered that NTP incorrectly handled certain
spoofed addresses when performing rate limiting. A remote attacker
could possibly use this issue to perform a denial of service. This
issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu
16.10. (CVE-2016-7426)

Matthew Van Gundy discovered that NTP incorrectly handled certain
crafted broadcast mode packets. A remote attacker could possibly use
this issue to perform a denial of service. This issue only affected
Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 16.10. (CVE-2016-7427,
CVE-2016-7428)

Miroslav Lichvar discovered that NTP incorrectly handled certain
responses. A remote attacker could possibly use this issue to perform
a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu
16.04 LTS, and Ubuntu 16.10. (CVE-2016-7429)

Sharon Goldberg and Aanchal Malhotra discovered that NTP incorrectly
handled origin timestamps of zero. A remote attacker could possibly
use this issue to bypass the origin timestamp protection mechanism.
This issue only affected Ubuntu 16.10. (CVE-2016-7431)

Brian Utterback, Sharon Goldberg and Aanchal Malhotra discovered that
NTP incorrectly performed initial sync calculations. This issue only
applied to Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7433)

Magnus Stubman discovered that NTP incorrectly handled certain mrulist
queries. A remote attacker could possibly use this issue to cause NTP
to crash, resulting in a denial of service. This issue only affected
Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-7434)

Matthew Van Gund discovered that NTP incorrectly handled origin
timestamp checks. A remote attacker could possibly use this issue to
perform a denial of service. This issue only affected Ubuntu Ubuntu
16.10, and Ubuntu 17.04. (CVE-2016-9042)

Matthew Van Gundy discovered that NTP incorrectly handled certain
control mode packets. A remote attacker could use this issue to set or
unset traps. This issue only applied to Ubuntu 14.04 LTS, Ubuntu 16.04
LTS and Ubuntu 16.10. (CVE-2016-9310)

Matthew Van Gundy discovered that NTP incorrectly handled the trap
service. A remote attacker could possibly use this issue to cause NTP
to crash, resulting in a denial of service. This issue only applied to
Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. (CVE-2016-9311)

It was discovered that NTP incorrectly handled memory when processing
long variables. A remote authenticated user could possibly use this
issue to cause NTP to crash, resulting in a denial of service.
(CVE-2017-6458)

It was discovered that NTP incorrectly handled memory when processing
long variables. A remote authenticated user could possibly use this
issue to cause NTP to crash, resulting in a denial of service. This
issue only applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04.
(CVE-2017-6460)

It was discovered that the NTP legacy DPTS refclock driver incorrectly
handled the /dev/datum device. A local attacker could possibly use
this issue to cause a denial of service. (CVE-2017-6462)

It was discovered that NTP incorrectly handled certain invalid
settings in a :config directive. A remote authenticated user could
possibly use this issue to cause NTP to crash, resulting in a denial
of service. (CVE-2017-6463)

It was discovered that NTP incorrectly handled certain invalid mode
configuration directives. A remote authenticated user could possibly
use this issue to cause NTP to crash, resulting in a denial of
service. (CVE-2017-6464).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://usn.ubuntu.com/3349-1/"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected ntp package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/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:L/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:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ntp");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.10");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:17.04");

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/01/13");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/07/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2017/07/06");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"Ubuntu Security Notice (C) 2017-2019 Canonical, Inc. / NASL script (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Ubuntu Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("ubuntu.inc");
include("misc_func.inc");

if ( ! get_kb_item("Host/local_checks_enabled") ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/Ubuntu/release");
if ( isnull(release) ) audit(AUDIT_OS_NOT, "Ubuntu");
release = chomp(release);
if (! preg(pattern:"^(14\.04|16\.04|16\.10|17\.04)$", string:release)) audit(AUDIT_OS_NOT, "Ubuntu 14.04 / 16.04 / 16.10 / 17.04", "Ubuntu " + release);
if ( ! get_kb_item("Host/Debian/dpkg-l") ) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ("x86_64" >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Ubuntu", cpu);

flag = 0;

if (ubuntu_check(osver:"14.04", pkgname:"ntp", pkgver:"1:4.2.6.p5+dfsg-3ubuntu2.14.04.11")) flag++;
if (ubuntu_check(osver:"16.04", pkgname:"ntp", pkgver:"1:4.2.8p4+dfsg-3ubuntu5.5")) flag++;
if (ubuntu_check(osver:"16.10", pkgname:"ntp", pkgver:"1:4.2.8p8+dfsg-1ubuntu2.1")) flag++;
if (ubuntu_check(osver:"17.04", pkgname:"ntp", pkgver:"1:4.2.8p9+dfsg-2ubuntu1.1")) flag++;

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_HOLE,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, "ntp");
}