Vulnerabilities > CVE-2013-4851 - Permissions, Privileges, and Access Controls vulnerability in Freebsd 8.3/9.0/9.1

#%NASL_MIN_LEVEL 80502
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-2743. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(69483);
  script_version("1.10");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/03/12");

  script_cve_id("CVE-2013-3077", "CVE-2013-4851", "CVE-2013-5209");
  script_bugtraq_id(61484, 61939, 61946);
  script_xref(name:"DSA", value:"2743");

  script_name(english:"Debian DSA-2743-1 : kfreebsd-9 - privilege escalation/information leak");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Several vulnerabilities have been discovered in the FreeBSD kernel
that may lead to a privilege escalation or information leak. The
Common Vulnerabilities and Exposures project identifies the following
problems :

  - CVE-2013-3077
    Clement Lecigne from the Google Security Team reported
    an integer overflow in computing the size of a temporary
    buffer in the IP multicast code, which can result in a
    buffer which is too small for the requested operation.
    An unprivileged process can read or write pages of
    memory which belong to the kernel. These may lead to
    exposure of sensitive information or allow privilege
    escalation.

  - CVE-2013-4851
    Rick Macklem, Christopher Key and Tim Zingelman reported
    that the FreeBSD kernel incorrectly uses client supplied
    credentials instead of the one configured in exports(5)
    when filling out the anonymous credential for a NFS
    export, when -network or -host restrictions are used at
    the same time. The remote client may supply privileged
    credentials (e.g. the root user) when accessing a file
    under the NFS share, which will bypass the normal access
    checks.

  - CVE-2013-5209
    Julian Seward and Michael Tuexen reported a kernel
    memory disclosure when initializing the SCTP state
    cookie being sent in INIT-ACK chunks, a buffer allocated
    from the kernel stack is not completely initialized.
    Fragments of kernel memory may be included in SCTP
    packets and transmitted over the network. For each SCTP
    session, there are two separate instances in which a
    4-byte fragment may be transmitted.

  This memory might contain sensitive information, such as portions of
  the file cache or terminal buffers. This information might be
  directly useful, or it might be leveraged to obtain elevated
  privileges in some way. For example, a terminal buffer might include
  an user-entered password."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2013-3077"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2013-4851"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://security-tracker.debian.org/tracker/CVE-2013-5209"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://packages.debian.org/source/wheezy/kfreebsd-9"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://www.debian.org/security/2013/dsa-2743"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the kfreebsd-9 packages.

For the stable distribution (wheezy), these problems has been fixed in
version 9.0-10+deb70.3."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:kfreebsd-9");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:7.0");

  script_set_attribute(attribute:"patch_publication_date", value:"2013/08/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2013/08/28");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2013-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


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


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9-486", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9-686", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9-686-smp", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9-amd64", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9-malta", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9-xen", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9.0-2", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9.0-2-486", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9.0-2-686", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9.0-2-686-smp", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9.0-2-amd64", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9.0-2-malta", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-headers-9.0-2-xen", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9-486", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9-686", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9-686-smp", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9-amd64", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9-malta", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9-xen", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9.0-2-486", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9.0-2-686", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9.0-2-686-smp", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9.0-2-amd64", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9.0-2-malta", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-image-9.0-2-xen", reference:"9.0-10+deb70.3")) flag++;
if (deb_check(release:"7.0", prefix:"kfreebsd-source-9.0", reference:"9.0-10+deb70.3")) flag++;

if (flag)
{
  if (report_verbosity > 0) security_hole(port:0, extra:deb_report_get());
  else security_hole(0);
  exit(0);
}
else audit(AUDIT_HOST_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(92834);
  script_version("2.4");
  script_cvs_date("Date: 2018/12/07  9:46:53");

  script_cve_id("CVE-2013-4851");
  script_bugtraq_id(61484);
  script_xref(name:"FreeBSD", value:"SA-13:08.nfsserver");

  script_name(english:"FreeBSD : FreeBSD -- Incorrect privilege validation in the NFS server (e5d2442d-5e76-11e6-a6c3-14dae9d210b8)");
  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:
"Problem Description :

The kernel incorrectly uses client supplied credentials instead of the
one configured in exports(5) when filling out the anonymous credential
for a NFS export, when -network or -host restrictions are used at the
same time.

Impact :

The remote client may supply privileged credentials (e.g. the root
user) when accessing a file under the NFS share, which will bypass the
normal access checks."
  );
  # https://vuxml.freebsd.org/freebsd/e5d2442d-5e76-11e6-a6c3-14dae9d210b8.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?e921ad7c"
  );
  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:N");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  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:"2013/07/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/08/10");
  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>=9.1<9.1_5")) flag++;
if (pkg_test(save_report:TRUE, pkg:"FreeBSD>=8.3<8.3_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");