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nessusThis script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.FREEBSD_PKG_A92DCC5CE05C11E9B58910C37B4AC2EA.NASL
HistorySep 30, 2019 - 12:00 a.m.

FreeBSD : go -- invalid headers are normalized, allowing request smuggling (a92dcc5c-e05c-11e9-b589-10c37b4ac2ea)

2019-09-3000:00:00
This script is Copyright (C) 2019-2020 and is owned by Tenable, Inc. or an Affiliate thereof.
www.tenable.com
10

The Go project reports :

net/http (through net/textproto) used to accept and normalize invalid HTTP/1.1 headers with a space before the colon, in violation of RFC 7230. If a Go server is used behind a reverse proxy that accepts and forwards but doesn’t normalize such invalid headers, the reverse proxy and the server can interpret the headers differently. This can lead to filter bypasses or request smuggling, the latter if requests from separate clients are multiplexed onto the same connection by the proxy. Such invalid headers are now rejected by Go servers, and passed without normalization to Go client applications.

#
# (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(129426);
  script_version("1.6");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/10/09");

  script_cve_id("CVE-2019-16276");
  script_xref(name:"IAVB", value:"2019-B-0085-S");

  script_name(english:"FreeBSD : go -- invalid headers are normalized, allowing request smuggling (a92dcc5c-e05c-11e9-b589-10c37b4ac2ea)");
  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:
"The Go project reports :

net/http (through net/textproto) used to accept and normalize invalid
HTTP/1.1 headers with a space before the colon, in violation of RFC
7230. If a Go server is used behind a reverse proxy that accepts and
forwards but doesn't normalize such invalid headers, the reverse proxy
and the server can interpret the headers differently. This can lead to
filter bypasses or request smuggling, the latter if requests from
separate clients are multiplexed onto the same connection by the
proxy. Such invalid headers are now rejected by Go servers, and passed
without normalization to Go client applications."
  );
  script_set_attribute(attribute:"see_also", value:"https://github.com/golang/go/issues/34540");
  # https://vuxml.freebsd.org/freebsd/a92dcc5c-e05c-11e9-b589-10c37b4ac2ea.html
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?abf724e6");
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N");
  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:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2019-16276");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2019/09/25");
  script_set_attribute(attribute:"patch_publication_date", value:"2019/09/26");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/09/30");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2019-2020 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:"go<1.13.1,1")) flag++;
if (pkg_test(save_report:TRUE, pkg:"go-devel<g20190925")) 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");