FreeBSD : krb5 -- MITKRB5-SA-2011-001, kpropd denial of service (64f24a1e-66cf-11e0-9deb-f345f3aa24f0)

2011-04-15T00:00:00
ID FREEBSD_PKG_64F24A1E66CF11E09DEBF345F3AA24F0.NASL
Type nessus
Reporter Tenable
Modified 2018-11-10T00:00:00

Description

An advisory published by the MIT Kerberos team says :

The MIT krb5 KDC database propagation daemon (kpropd) is vulnerable to a denial-of-service attack triggered by invalid network input. If a kpropd worker process receives invalid input that causes it to exit with an abnormal status, it can cause the termination of the listening process that spawned it, preventing the slave KDC it was running on from receiving database updates from the master KDC.

Exploit code is not known to exist, but the vulnerabilities are easy to trigger manually.

An unauthenticated remote attacker can cause kpropd running in standalone mode (the '-S' option) to terminate its listening process, preventing database propagations to the KDC host on which it was running. Configurations where kpropd runs in incremental propagation mode ('iprop') or as an inetd server are not affected.

                                        
                                            #
# (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(53441);
  script_version("1.8");
  script_cvs_date("Date: 2018/11/10 11:49:42");

  script_cve_id("CVE-2010-4022");

  script_name(english:"FreeBSD : krb5 -- MITKRB5-SA-2011-001, kpropd denial of service (64f24a1e-66cf-11e0-9deb-f345f3aa24f0)");
  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:
"An advisory published by the MIT Kerberos team says :

The MIT krb5 KDC database propagation daemon (kpropd) is vulnerable to
a denial-of-service attack triggered by invalid network input. If a
kpropd worker process receives invalid input that causes it to exit
with an abnormal status, it can cause the termination of the listening
process that spawned it, preventing the slave KDC it was running on
from receiving database updates from the master KDC.

Exploit code is not known to exist, but the vulnerabilities are easy
to trigger manually.

An unauthenticated remote attacker can cause kpropd running in
standalone mode (the '-S' option) to terminate its listening process,
preventing database propagations to the KDC host on which it was
running. Configurations where kpropd runs in incremental propagation
mode ('iprop') or as an inetd server are not affected."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2011-001.txt"
  );
  # https://vuxml.freebsd.org/freebsd/64f24a1e-66cf-11e0-9deb-f345f3aa24f0.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?6802ac64"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:krb5");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2011/02/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2011/04/14");
  script_set_attribute(attribute:"plugin_publication_date", value:"2011/04/15");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2011-2018 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");

  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:"krb5>=1.7<1.7.2")) flag++;
if (pkg_test(save_report:TRUE, pkg:"krb5>=1.8<1.8.4")) flag++;
if (pkg_test(save_report:TRUE, pkg:"krb5=1.9")) flag++;

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