FreeBSD : squid -- client-first SSL-bump does not correctly validate X509 server certificate (b6da24da-23f7-11e5-a4a5-002590263bf5)

2015-07-07T00:00:00
ID FREEBSD_PKG_B6DA24DA23F711E5A4A5002590263BF5.NASL
Type nessus
Reporter This script is Copyright (C) 2015-2019 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2019-11-02T00:00:00

Description

Squid security advisory 2015:1 reports :

Squid configured with client-first SSL-bump does not correctly validate X509 server certificate domain / hostname fields.

The bug is important because it allows remote servers to bypass client certificate validation. Some attackers may also be able to use valid certificates for one domain signed by a global Certificate Authority to abuse an unrelated domain.

However, the bug is exploitable only if you have configured Squid to perform SSL Bumping with the

                                        
                                            #
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from the FreeBSD VuXML database :
#
# Copyright 2003-2019 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(84555);
  script_version("2.3");
  script_cvs_date("Date: 2019/07/10 16:04:13");

  script_cve_id("CVE-2015-3455");

  script_name(english:"FreeBSD : squid -- client-first SSL-bump does not correctly validate X509 server certificate (b6da24da-23f7-11e5-a4a5-002590263bf5)");
  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:
"Squid security advisory 2015:1 reports :

Squid configured with client-first SSL-bump does not correctly
validate X509 server certificate domain / hostname fields.

The bug is important because it allows remote servers to bypass client
certificate validation. Some attackers may also be able to use valid
certificates for one domain signed by a global Certificate Authority
to abuse an unrelated domain.

However, the bug is exploitable only if you have configured Squid to
perform SSL Bumping with the 'client-first' or 'bump' mode of
operation.

Sites that do not use SSL-Bump are not vulnerable.

All Squid built without SSL support are not vulnerable to the problem.

The FreeBSD port does not use SSL by default and is not vulnerable in
the default configuration."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.squid-cache.org/Advisories/SQUID-2015_1.txt"
  );
  # https://vuxml.freebsd.org/freebsd/b6da24da-23f7-11e5-a4a5-002590263bf5.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?bd26f4c0"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N");

  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:"p-cpe:/a:freebsd:freebsd:squid32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:freebsd:freebsd:squid33");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:freebsd:freebsd");

  script_set_attribute(attribute:"vuln_publication_date", value:"2015/05/01");
  script_set_attribute(attribute:"patch_publication_date", value:"2015/07/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2015/07/07");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2015-2019 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<3.5.4")) flag++;
if (pkg_test(save_report:TRUE, pkg:"squid>=3.4<3.4.13")) flag++;
if (pkg_test(save_report:TRUE, pkg:"squid33>=3.3<3.3.14")) flag++;
if (pkg_test(save_report:TRUE, pkg:"squid32>=3.2<3.2.14")) flag++;

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