FreeBSD : dbus -- multiple vulnerabilities (38242d51-3e58-11e4-ac2f-bcaec565249c)

2014-09-18T00:00:00
ID FREEBSD_PKG_38242D513E5811E4AC2FBCAEC565249C.NASL
Type nessus
Reporter Tenable
Modified 2018-11-21T00:00:00

Description

Simon McVittie reports :

Do not accept an extra fd in the padding of a cmsg message, which could lead to a 4-byte heap buffer overrun (CVE-2014-3635).

Reduce default for maximum Unix file descriptors passed per message from 1024 to 16, preventing a uid with the default maximum number of connections from exhausting the system bus' file descriptors under Linux's default rlimit (CVE-2014-3636).

Disconnect connections that still have a fd pending unmarshalling after a new configurable limit, pending_fd_timeout (defaulting to 150 seconds), removing the possibility of creating an abusive connection that cannot be disconnected by setting up a circular reference to a connection's file descriptor (CVE-2014-3637).

Reduce default for maximum pending replies per connection from 8192 to 128, mitigating an algorithmic complexity denial-of-service attack (CVE-2014-3638).

Reduce default for authentication timeout on the system bus from 30 seconds to 5 seconds, avoiding denial of service by using up all unauthenticated connection slots; and when all unauthenticated connection slots are used up, make new connection attempts block instead of disconnecting them (CVE-2014-3639).

                                        
                                            #
# (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(77733);
  script_version("1.6");
  script_cvs_date("Date: 2018/11/21 10:46:31");

  script_cve_id("CVE-2014-3635", "CVE-2014-3636", "CVE-2014-3637", "CVE-2014-3638", "CVE-2014-3639");

  script_name(english:"FreeBSD : dbus -- multiple vulnerabilities (38242d51-3e58-11e4-ac2f-bcaec565249c)");
  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:
"Simon McVittie reports :

Do not accept an extra fd in the padding of a cmsg message, which
could lead to a 4-byte heap buffer overrun (CVE-2014-3635).

Reduce default for maximum Unix file descriptors passed per message
from 1024 to 16, preventing a uid with the default maximum number of
connections from exhausting the system bus' file descriptors under
Linux's default rlimit (CVE-2014-3636).

Disconnect connections that still have a fd pending unmarshalling
after a new configurable limit, pending_fd_timeout (defaulting to 150
seconds), removing the possibility of creating an abusive connection
that cannot be disconnected by setting up a circular reference to a
connection's file descriptor (CVE-2014-3637).

Reduce default for maximum pending replies per connection from 8192 to
128, mitigating an algorithmic complexity denial-of-service attack
(CVE-2014-3638).

Reduce default for authentication timeout on the system bus from 30
seconds to 5 seconds, avoiding denial of service by using up all
unauthenticated connection slots; and when all unauthenticated
connection slots are used up, make new connection attempts block
instead of disconnecting them (CVE-2014-3639)."
  );
  # http://lists.freedesktop.org/archives/dbus/2014-September/016343.html
  script_set_attribute(
    attribute:"see_also",
    value:"https://lists.freedesktop.org/archives/dbus/2014-September/016343.html"
  );
  # https://vuxml.freebsd.org/freebsd/38242d51-3e58-11e4-ac2f-bcaec565249c.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e22fca01"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:P/A:P");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/09/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/09/17");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/09/18");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2018 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:"dbus<1.8.8")) 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");