FreeBSD : kea -- unexpected termination while handling a malformed packet (59e7eb28-b309-11e5-af83-80ee73b5dcf5)

2016-01-06T00:00:00
ID FREEBSD_PKG_59E7EB28B30911E5AF8380EE73B5DCF5.NASL
Type nessus
Reporter Tenable
Modified 2016-10-19T00:00:00

Description

ISC Support reports :

ISC Kea may terminate unexpectedly (crash) while handling a malformed client packet. Related defects in the kea-dhcp4 and kea-dhcp6 servers can cause the server to crash during option processing if a client sends a malformed packet. An attacker sending a crafted malformed packet can cause an ISC Kea server providing DHCP services to IPv4 or IPv6 clients to exit unexpectedly.

  • The kea-dhcp4 server is vulnerable only in versions 0.9.2 and 1.0.0-beta, and furthermore only when logging at debug level 40 or higher. Servers running kea-dhcp4 versions 0.9.1 or lower, and servers which are not logging or are logging at debug level 39 or below are not vulnerable.

  • The kea-dhcp6 server is vulnerable only in versions 0.9.2 and 1.0.0-beta, and furthermore only when logging at debug level 45 or higher. Servers running kea-dhcp6 versions 0.9.1 or lower, and servers which are not logging or are logging at debug level 44 or below are not vulnerable.

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2016 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(87744);
  script_version("$Revision: 2.2 $");
  script_cvs_date("$Date: 2016/10/19 14:02:54 $");

  script_cve_id("CVE-2015-8373");

  script_name(english:"FreeBSD : kea -- unexpected termination while handling a malformed packet (59e7eb28-b309-11e5-af83-80ee73b5dcf5)");
  script_summary(english:"Checks for updated package in pkg_info output");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote FreeBSD host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"ISC Support reports :

ISC Kea may terminate unexpectedly (crash) while handling a malformed
client packet. Related defects in the kea-dhcp4 and kea-dhcp6 servers
can cause the server to crash during option processing if a client
sends a malformed packet. An attacker sending a crafted malformed
packet can cause an ISC Kea server providing DHCP services to IPv4 or
IPv6 clients to exit unexpectedly.

- The kea-dhcp4 server is vulnerable only in versions 0.9.2 and
1.0.0-beta, and furthermore only when logging at debug level 40 or
higher. Servers running kea-dhcp4 versions 0.9.1 or lower, and servers
which are not logging or are logging at debug level 39 or below are
not vulnerable.

- The kea-dhcp6 server is vulnerable only in versions 0.9.2 and
1.0.0-beta, and furthermore only when logging at debug level 45 or
higher. Servers running kea-dhcp6 versions 0.9.1 or lower, and servers
which are not logging or are logging at debug level 44 or below are
not vulnerable."
  );
  # https://kb.isc.org/article/AA-01318/0/CVE-2015-8373-ISC-Kea%3A-unexpected-termination-while-handling-a-malformed-packet.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?7d30aa3c"
  );
  # http://www.freebsd.org/ports/portaudit/59e7eb28-b309-11e5-af83-80ee73b5dcf5.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?51aeddd3"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:kea");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/12/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/01/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/01/06");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2016 Tenable Network Security, Inc.");
  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");

  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);


flag = 0;

if (pkg_test(save_report:TRUE, pkg:"kea>=0.9.2<1.0.0")) 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");