Vulnerabilities > CVE-2019-5608 - Out-of-bounds Write vulnerability in multiple products

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

include("compat.inc");

if (description)
{
  script_id(128078);
  script_version("1.2");
  script_cvs_date("Date: 2019/08/30 12:15:05");

  script_cve_id("CVE-2019-5608");

  script_name(english:"FreeBSD 11.x < 11.2-RELEASE-p13 / 11.x < 11.3-RELEASE-p2 / 12.x < 12.0-RELEASE-p9 MLDv2 Out-of-Bounds Memory Access DoS");
  script_summary(english:"Checks for the version of the FreeBSD kernel.");

  script_set_attribute(attribute:"synopsis", value:
"The remote FreeBSD host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The version of the FreeBSD kernel running on the remote host is 11.x
prior to 11.2-RELEASE-p13, 11.x prior to 11.3-RELEASE-p2, or 12.x prior
to 12.0-RELEASE-p9. It is, therefore, affected by an out-of-bounds
memory access denial-of-service vulnerability in MLDv2. An
unauthenticated attacker could exploit this, via a malicious MLDv2
listener query packet, to cause an out-of-bounds memory access and a
subsequent kernel panic.

Note: Systems not using IPv6 are not affected.");
  script_set_attribute(attribute:"see_also", value:"https://www.freebsd.org/security/advisories/FreeBSD-SA-19:19.mldv2.asc");
  script_set_attribute(attribute:"solution", value:
"Upgrade to the appropriate FreeBSD version.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-5608");

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/08/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/08/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/08/22");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");
  script_set_attribute(attribute:"potential_vulnerability", value:"true");
  script_end_attributes();

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

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

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

  exit(0);
}

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

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

# Patches are available, require paranoid since it is possible
#  to manually patch and have a lower OS level. Additionally,
# systems not using IPv6 are not affected.
if (report_paranoia < 2) audit(AUDIT_PARANOID);

fix = NULL;

if (release =~ "^FreeBSD-11\.[0-2]($|[^0-9])")
  fix = "FreeBSD-11.2_13";
if (release =~ "^FreeBSD-11\.3($|[^0-9])")
  fix = "FreeBSD-11.3_2";
else if (release =~ "^FreeBSD-12\.0($|[^0-9])")
  fix = "FreeBSD-12.0_9";

if (isnull(fix) || pkg_cmp(pkg:release, reference:fix) >= 0)
  audit(AUDIT_HOST_NOT, "affected");

report =
  '\n  Installed version : ' + release +
  '\n  Fixed version     : ' + fix +
  '\n';
security_report_v4(port:0, severity:SECURITY_WARNING, extra:report);

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2019 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(130241);
  script_version("1.2");
  script_cvs_date("Date: 2019/12/18");

  script_cve_id("CVE-2019-5608");
  script_xref(name:"FreeBSD", value:"SA-19:19.mldv2");

  script_name(english:"FreeBSD : FreeBSD -- ICMPv6 / MLDv2 out-of-bounds memory access (41d2f3e6-f680-11e9-a87f-a4badb2f4699)");
  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:
"The ICMPv6 input path incorrectly handles cases where an MLDv2
listener query packet is internally fragmented across multiple mbufs.
Impact : A remote attacker may be able to cause an out-of-bounds read
or write that may cause the kernel to attempt to access an unmapped
page and subsequently panic."
  );
  # https://vuxml.freebsd.org/freebsd/41d2f3e6-f680-11e9-a87f-a4badb2f4699.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?846f23fc"
  );
  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_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:"exploitability_ease", value:"No known exploits are available");

  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:"2019/08/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/10/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/10/25");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019 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>=12.0<12.0_9")) flag++;
if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=11.3<11.3_2")) flag++;
if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=11.2<11.2_13")) 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");