Vulnerabilities > CVE-2017-6459 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in NTP

047910
CVSS 5.5 - MEDIUM
Attack vector
LOCAL
Attack complexity
LOW
Privileges required
LOW
Confidentiality impact
NONE
Integrity impact
NONE
Availability impact
HIGH
local
low complexity
ntp
CWE-119
nessus
NVD
Published: 2017-03-27
Updated: 2017-10-24

Summary

The Windows installer for NTP before 4.2.8p10 and 4.3.x before 4.3.94 allows local users to have unspecified impact via vectors related to an argument with multiple null bytes.

Vulnerable Configurations

Part Description Count
Application
Ntp
95

Common Weakness Enumeration (CWE)

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.

Nessus

  • NASL familySlackware Local Security Checks
    NASL idSLACKWARE_SSA_2017-112-02.NASL
    descriptionNew ntp packages are available for Slackware 13.0, 13.1, 13.37, 14.0, 14.1, 14.2, and -current to fix security issues.
    last seen2020-06-01
    modified2020-06-02
    plugin id99597
    published2017-04-24
    reporterThis script is Copyright (C) 2017-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/99597
    titleSlackware 13.0 / 13.1 / 13.37 / 14.0 / 14.1 / 14.2 / current : ntp (SSA:2017-112-02)
    code
    #
# (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");
  • NASL familyMisc.
    NASL idNTP_4_2_8P10.NASL
    descriptionThe version of the remote NTP server is 4.x prior to 4.2.8p10. It is, therefore, affected by the following vulnerabilities : - A denial of service vulnerability exists in the receive() function within file ntpd/ntp_proto.c due to the expected origin timestamp being cleared when a packet with a zero origin timestamp is received. An unauthenticated, remote attacker can exploit this issue, via specially crafted network packets, to reset the expected origin timestamp for a target peer, resulting in legitimate replies being dropped. (CVE-2016-9042) - An out-of-bounds write error exists in the mx4200_send() function within file ntpd/refclock_mx4200.c due to improper handling of the return value of the snprintf() and vsnprintf() functions. An unauthenticated, remote attacker can exploit this to cause a denial of service condition or possibly the execution of arbitrary code. However, neither the researcher nor vendor could find any exploitable code path. (CVE-2017-6451) - A stack-based buffer overflow condition exists in the addSourceToRegistry() function within file ports/winnt/instsrv/instsrv.c due to improper validation of certain input when adding registry keys. A local attacker can exploit this to execute arbitrary code. (CVE-2017-6452) - A flaw exists due to dynamic link library (DLL) files being preloaded when they are defined in the inherited environment variable
    last seen2020-06-01
    modified2020-06-02
    plugin id97988
    published2017-03-27
    reporterThis script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
    sourcehttps://www.tenable.com/plugins/nessus/97988
    titleNetwork Time Protocol Daemon (ntpd) 4.x < 4.2.8p10 Multiple Vulnerabilities
  • NASL familyMacOS X Local Security Checks
    NASL idMACOS_10_13.NASL
    descriptionThe remote host is running a version of Mac OS X that is prior to 10.10.5, 10.11.x prior to 10.11.6, 10.12.x prior to 10.12.6, or is not macOS 10.13. It is, therefore, affected by multiple vulnerabilities in the following components : - apache - AppSandbox - AppleScript - Application Firewall - ATS - Audio - CFNetwork - CFNetwork Proxies - CFString - Captive Network Assistant - CoreAudio - CoreText - DesktopServices - Directory Utility - file - Fonts - fsck_msdos - HFS - Heimdal - HelpViewer - IOFireWireFamily - ImageIO - Installer - Kernel - kext tools - libarchive - libc - libexpat - Mail - Mail Drafts - ntp - Open Scripting Architecture - PCRE - Postfix - Quick Look - QuickTime - Remote Management - SQLite - Sandbox - Screen Lock - Security - Spotlight - WebKit - zlib Note that successful exploitation of the most serious issues can result in arbitrary code execution.
    last seen2020-06-01
    modified2020-06-02
    plugin id103598
    published2017-10-03
    reporterThis script is Copyright (C) 2017-2018 Tenable Network Security, Inc.
    sourcehttps://www.tenable.com/plugins/nessus/103598
    titlemacOS < 10.13 Multiple Vulnerabilities

References