FreeBSD : squid -- multiple vulnerabilities (e05bfc92-0763-11e6-94fa-002590263bf5)

2016-04-21T00:00:00
ID FREEBSD_PKG_E05BFC92076311E694FA002590263BF5.NASL
Type nessus
Reporter Tenable
Modified 2018-11-10T00:00:00

Description

Squid security advisory 2016:5 reports :

Due to incorrect buffer management Squid cachemgr.cgi tool is vulnerable to a buffer overflow when processing remotely supplied inputs relayed to it from Squid.

This problem allows any client to seed the Squid manager reports with data that will cause a buffer overflow when processed by the cachemgr.cgi tool. However, this does require manual administrator actions to take place. Which greatly reduces the impact and possible uses.

Squid security advisory 2016:6 reports :

Due to buffer overflow issues Squid is vulnerable to a denial of service attack when processing ESI responses. Due to incorrect input validation Squid is vulnerable to public information disclosure of the server stack layout when processing ESI responses. Due to incorrect input validation and buffer overflow Squid is vulnerable to remote code execution when processing ESI responses.

These problems allow ESI components to be used to perform a denial of service attack on the Squid service and all other services on the same machine. Under certain build conditions these problems allow remote clients to view large sections of the server memory. However, the bugs are exploitable only if you have built and configured the ESI features to be used by a reverse-proxy and if the ESI components being processed by Squid can be controlled by an attacker.

                                        
                                            #
# (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(90608);
  script_version("2.4");
  script_cvs_date("Date: 2018/11/10 11:49:45");

  script_cve_id("CVE-2016-4051", "CVE-2016-4052", "CVE-2016-4053", "CVE-2016-4054");

  script_name(english:"FreeBSD : squid -- multiple vulnerabilities (e05bfc92-0763-11e6-94fa-002590263bf5)");
  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:
"Squid security advisory 2016:5 reports :

Due to incorrect buffer management Squid cachemgr.cgi tool is
vulnerable to a buffer overflow when processing remotely supplied
inputs relayed to it from Squid.

This problem allows any client to seed the Squid manager reports with
data that will cause a buffer overflow when processed by the
cachemgr.cgi tool. However, this does require manual administrator
actions to take place. Which greatly reduces the impact and possible
uses.

Squid security advisory 2016:6 reports :

Due to buffer overflow issues Squid is vulnerable to a denial of
service attack when processing ESI responses. Due to incorrect input
validation Squid is vulnerable to public information disclosure of the
server stack layout when processing ESI responses. Due to incorrect
input validation and buffer overflow Squid is vulnerable to remote
code execution when processing ESI responses.

These problems allow ESI components to be used to perform a denial of
service attack on the Squid service and all other services on the same
machine. Under certain build conditions these problems allow remote
clients to view large sections of the server memory. However, the bugs
are exploitable only if you have built and configured the ESI features
to be used by a reverse-proxy and if the ESI components being
processed by Squid can be controlled by an attacker."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208939"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.squid-cache.org/Advisories/SQUID-2016_5.txt"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.squid-cache.org/Advisories/SQUID-2016_6.txt"
  );
  # https://vuxml.freebsd.org/freebsd/e05bfc92-0763-11e6-94fa-002590263bf5.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?dc1a428f"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:P/A:P");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2016/04/20");
  script_set_attribute(attribute:"patch_publication_date", value:"2016/04/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2016/04/21");
  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:"squid<3.5.17")) 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");