Vulnerabilities > CVE-2016-6559 - Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in Freebsd

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2018 Jacques Vidrine and contributors
#
# Redistribution and use in source (VuXML) and 'compiled' forms (SGML,
# HTML, PDF, PostScript, RTF and so forth) with or without modification,
# are permitted provided that the following conditions are met:
# 1. Redistributions of source code (VuXML) must retain the above
#    copyright notice, this list of conditions and the following
#    disclaimer as the first lines of this file unmodified.
# 2. Redistributions in compiled form (transformed to other DTDs,
#    published online in any format, converted to PDF, PostScript,
#    RTF and other formats) must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer
#    in the documentation and/or other materials provided with the
#    distribution.
# 
# THIS DOCUMENTATION IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
# OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
# OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
# BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
# OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS DOCUMENTATION,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

include("compat.inc");

if (description)
{
  script_id(95585);
  script_version("3.4");
  script_cvs_date("Date: 2018/11/10 11:49:45");

  script_cve_id("CVE-2016-6559");
  script_xref(name:"FreeBSD", value:"SA-16:37.libc");

  script_name(english:"FreeBSD : FreeBSD -- link_ntoa(3) buffer overflow (0282269d-bbee-11e6-b1cf-14dae9d210b8)");
  script_summary(english:"Checks for updated packages in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:
"The remote FreeBSD host is missing one or more security-related
updates."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A specially crafted argument can trigger a static buffer overflow in
the library, with possibility to rewrite following static buffers that
belong to other library functions. Impact : Due to very limited use of
the function in the existing applications, and limited length of the
overflow, exploitation of the vulnerability does not seem feasible.
None of the utilities and daemons in the base system are known to be
vulnerable. However, careful review of third party software that may
use the function was not performed."
  );
  # https://vuxml.freebsd.org/freebsd/0282269d-bbee-11e6-b1cf-14dae9d210b8.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?98fb1d8f"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  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_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:FreeBSD");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/12/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/12/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/12/07");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016-2018 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"FreeBSD Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/FreeBSD/release", "Host/FreeBSD/pkg_info", "Settings/ParanoidReport");

  exit(0);
}


include("audit.inc");
include("freebsd_package.inc");


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


if (report_paranoia < 2) audit(AUDIT_PARANOID);

flag = 0;

if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=11.0<11.0_5")) flag++;
if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=10.3<10.3_14")) flag++;
if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=10.2<10.2_27")) flag++;
if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=10.1<10.1_44")) flag++;
if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=9.3<9.3_52")) flag++;

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

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

include("compat.inc");

if (description)
{
  script_id(106503);
  script_version("1.12");
  script_cvs_date("Date: 2019/11/08");

  script_cve_id(
    "CVE-2016-1889",
    "CVE-2016-6559",
    "CVE-2016-7426",
    "CVE-2016-7427",
    "CVE-2016-7428",
    "CVE-2016-7429",
    "CVE-2016-7431",
    "CVE-2016-7433",
    "CVE-2016-7434",
    "CVE-2016-8610",
    "CVE-2016-8858",
    "CVE-2016-9310",
    "CVE-2016-9311",
    "CVE-2016-9312",
    "CVE-2016-10009",
    "CVE-2016-10010"
  );
  script_bugtraq_id(
    93776,
    93841,
    94444,
    94446,
    94447,
    94448,
    94450,
    94451,
    94452,
    94453,
    94454,
    94455,
    94694,
    94968,
    94972
  );
  script_xref(name:"CERT", value:"633847");
  script_xref(name:"FreeBSD", value:"SA-16:29.bspatch");
  script_xref(name:"FreeBSD", value:"SA-16:31.libarchive");
  script_xref(name:"FreeBSD", value:"SA-16:33.openssh");
  script_xref(name:"FreeBSD", value:"SA-16:35.openssl");
  script_xref(name:"FreeBSD", value:"SA-16:37.libc");
  script_xref(name:"FreeBSD", value:"SA-16:38.bhyve");
  script_xref(name:"FreeBSD", value:"SA-16:39.ntp");
  script_xref(name:"FreeBSD", value:"SA-17:01.openssh");

  script_name(english:"pfSense < 2.3.3 Multiple Vulnerabilities (SA-17_01 - SA-17_03)");
  script_summary(english:"Checks the version of pfSense.");

  script_set_attribute(attribute:"synopsis", value:
"The remote firewall host is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the remote pfSense
install is affected by multiple vulnerabilities as stated in the
referenced vendor advisories.");
  script_set_attribute(attribute:"see_also", value:"https://doc.pfsense.org/index.php/2.3.3_New_Features_and_Changes");
  # https://www.pfsense.org/security/advisories/pfSense-SA-17_01.webgui.asc
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?96e388ec");
  # https://www.pfsense.org/security/advisories/pfSense-SA-17_02.webgui.asc
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?871cf23b");
  # https://www.pfsense.org/security/advisories/pfSense-SA-17_03.webgui.asc
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?36b6ea9d");
  script_set_attribute(attribute:"solution", value:
"Upgrade to pfSense version 2.3.3 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/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: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-2016-6559");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2017/02/17");
  script_set_attribute(attribute:"patch_publication_date", value:"2017/02/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2018/01/31");

  script_set_attribute(attribute:"plugin_type", value:"remote");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:pfsense:pfsense");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:bsdperimeter:pfsense");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Firewalls");

  script_copyright(english:"This script is Copyright (C) 2018-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("pfsense_detect.nbin");
  script_require_keys("Host/pfSense");

  exit(0);
}

include("vcf.inc");
include("vcf_extras.inc");

if (!get_kb_item("Host/pfSense")) audit(AUDIT_HOST_NOT, "pfSense");

app_info = vcf::pfsense::get_app_info();
constraints = [
  { "fixed_version" : "2.3.3" }
];

vcf::pfsense::check_version_and_report(
  app_info:app_info,
  constraints:constraints,
  severity:SECURITY_HOLE,
  flags:{xss:TRUE, xsrf:TRUE}
);