Vulnerabilities > CVE-2016-2193 - 7PK - Security Features vulnerability in Postgresql 9.5/9.5.1

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

include("compat.inc");

if (description)
{
  script_id(90423);
  script_version("1.9");
  script_cvs_date("Date: 2019/11/19");

  script_cve_id("CVE-2016-2193", "CVE-2016-3065");
  script_bugtraq_id(85784, 85786);

  script_name(english:"PostgreSQL 9.5.x < 9.5.2 Multiple Vulnerabilities");
  script_summary(english:"Checks the version of PostgreSQL.");

  script_set_attribute(attribute:"synopsis", value:
"The remote database server is affected by multiple vulnerabilities.");
  script_set_attribute(attribute:"description", value:
"The version of PostgreSQL installed on the remote host is 9.5.x prior
to 9.5.2. It is, therefore, affected by multiple vulnerabilities :

  - A flaw exists that is triggered when a query plan is
    incorrectly reused for more than one ROLE within the
    same session. An authenticated, remote attacker can
    exploit this to cause an incorrect set of Row Level
    Security (RLS) policies to be used for the query.
    (CVE-2016-2193)
  
  - A denial of service vulnerability exists within file
    contrib/pageinspect/brinfuncs.c when certain functions
    in the pageinspect extension are used with BRIN index
    pages. An authenticated, remote attacker can exploit
    this, via contrived 'bytea' values, to crash the server
    or disclose a small amount of server memory.
    (CVE-2016-3065)");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/about/news/1656/");
  script_set_attribute(attribute:"see_also", value:"https://www.postgresql.org/docs/current/release-9-5-2.html");
  script_set_attribute(attribute:"solution", value:
"Upgrade to PostgreSQL version 9.5.2 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C");
  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:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2016-3065");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/03/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/03/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:postgresql:postgresql");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Databases");

  script_copyright(english:"This script is Copyright (C) 2016-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("postgresql_version.nbin");
  script_require_ports("Services/postgresql", 5432);

  exit(0);
}

include("audit.inc");
include("backport.inc");
include("global_settings.inc");
include("misc_func.inc");

port = get_service(svc:"postgresql", default:5432, exit_on_fail:TRUE);

version = get_kb_item_or_exit('database/'+port+'/postgresql/version');
source = get_kb_item_or_exit('database/'+port+'/postgresql/source');

get_backport_banner(banner:source);
if (backported && report_paranoia < 2) audit(AUDIT_BACKPORT_SERVICE, port, 'PostgreSQL server');

ver = split(version, sep:'.');
for (i=0; i < max_index(ver); i++)
  ver[i] = int(ver[i]);

# Affected : 9.5.x < 9.5.2
if (ver[0] == 9 && ver[1] == 5 && ver[2] < 2)
{
    report = '';
    if(database)
      report += '\n  Database name     : ' + database ;
    report +=
      '\n  Version source    : ' + source +
      '\n  Installed version : ' + version +
      '\n  Fixed version     : 9.5.2\n';
  security_report_v4(
    port:port,
    severity:SECURITY_HOLE,
    extra: report
  );
}
else audit(AUDIT_LISTEN_NOT_VULN, 'PostgreSQL', port, version);

#
# (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(90290);
  script_version("2.8");
  script_cvs_date("Date: 2018/11/10 11:49:45");

  script_cve_id("CVE-2016-2193", "CVE-2016-3065");

  script_name(english:"FreeBSD : PostgreSQL -- minor security problems. (97a24d2e-f74c-11e5-8458-6cc21735f730)");
  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:
"PostgreSQL project reports :

Security Fixes for RLS, BRIN

This release closes security hole CVE-2016-2193
(https://access.redhat.com/security/cve/CVE-2016-2193), where a query
plan might get reused for more than one ROLE in the same session. This
could cause the wrong set of Row Level Security (RLS) policies to be
used for the query.

The update also fixes CVE-2016-3065
(https://access.redhat.com/security/cve/CVE-2016-3065), a server crash
bug triggered by using `pageinspect` with BRIN index pages. Since an
attacker might be able to expose a few bytes of server memory, this
crash is being treated as a security issue."
  );
  # https://vuxml.freebsd.org/freebsd/97a24d2e-f74c-11e5-8458-6cc21735f730.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?46575e38"
  );
  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:N/A:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:postgresql95-contrib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:postgresql95-server");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/03/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/03/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/01");
  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");

  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:"postgresql95-server>=9.5.0<9.5.2")) flag++;
if (pkg_test(save_report:TRUE, pkg:"postgresql95-contrib>=9.5.0<9.5.2")) 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");