Vulnerabilities > CVE-2014-3556 - Command Injection vulnerability in F5 Nginx

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

include('compat.inc');

if (description)
{
  script_id(77246);
  script_version("1.9");
  script_set_attribute(attribute:"plugin_modification_date", value:"2020/05/08");

  script_cve_id("CVE-2014-3556");
  script_bugtraq_id(69111);

  script_name(english:"nginx < 1.6.1 / 1.7.4 SMTP STARTTLS Command Injection");

  script_set_attribute(attribute:"synopsis", value:
"The remote web server is affected by a command injection
vulnerability.");
  script_set_attribute(attribute:"description", value:
"According to the self-reported version in the server response header,
the version of nginx installed on the remote host is 1.5.6 or higher,
1.6.x prior to 1.6.1, or 1.7.x prior to 1.7.4. It is, therefore,
affected by a command injection vulnerability.

A flaw exists in the function 'ngx_mail_smtp_starttls' within the file
'src/mail/ngx_mail_smtp_handler.c' whereby input to the STARTTLS
command is not properly sanitized. This could allow a remote attacker
in a privileged network position to obtain sensitive information by
injecting commands into an SSL session.

Note that this issue is exploitable only when nginx is used as an SMTP
proxy.");
  script_set_attribute(attribute:"see_also", value:"http://nginx.org/en/security_advisories.html");
  script_set_attribute(attribute:"see_also", value:"http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html");
  script_set_attribute(attribute:"see_also", value:"http://nginx.org/download/patch.2014.starttls.txt");
  script_set_attribute(attribute:"see_also", value:"http://nginx.org/en/CHANGES");
  script_set_attribute(attribute:"see_also", value:"http://nginx.org/en/CHANGES-1.6");
  script_set_attribute(attribute:"solution", value:
"Apply the patch manually, or upgrade to nginx 1.6.1 / 1.7.4 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/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:L/I:L/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-2014-3556");

  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:"2014/08/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/08/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/08/19");

  script_set_attribute(attribute:"plugin_type", value:"combined");
  script_set_attribute(attribute:"cpe", value:"cpe:/a:igor_sysoev:nginx");
  script_set_attribute(attribute:"agent", value:"unix");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Web Servers");

  script_copyright(english:"This script is Copyright (C) 2014-2020 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("nginx_detect.nasl", "nginx_nix_installed.nbin");
  script_require_keys("installed_sw/nginx");

  exit(0);
}

include('http.inc');
include('vcf.inc');

appname = 'nginx';
get_install_count(app_name:appname, exit_if_zero:TRUE);
app_info = vcf::combined_get_app_info(app:appname);

vcf::check_granularity(app_info:app_info, sig_segments:3);
# If the detection is only remote, Detection Method won't be set, and we should require paranoia
if (empty_or_null(app_info['Detection Method']) && report_paranoia < 2)
  audit(AUDIT_PARANOID);

constraints = [
  {'min_version':'1.5.6', 'fixed_version':'1.6.1'},
  {'min_version':'1.7.0', 'fixed_version':'1.7.4'}
];
vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_WARNING);

#
# (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(77109);
  script_version("1.3");
  script_cvs_date("Date: 2018/11/10 11:49:44");

  script_cve_id("CVE-2014-3556");

  script_name(english:"FreeBSD : nginx -- inject commands into SSL session vulnerability (ad747a01-1fee-11e4-8ff1-f0def16c5c1b)");
  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 nginx project reports :

Security: pipelined commands were not discarded after STARTTLS command
in SMTP proxy (CVE-2014-3556); the bug had appeared in 1.5.6."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://mailman.nginx.org/pipermail/nginx-announce/2014/000144.html"
  );
  # https://vuxml.freebsd.org/freebsd/ad747a01-1fee-11e4-8ff1-f0def16c5c1b.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?0afc1146"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:P/I:N/A:N");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2014/08/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2014/08/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2014/08/10");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2014-2018 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:"nginx>=1.6.0,2<1.6.1,2")) flag++;
if (pkg_test(save_report:TRUE, pkg:"nginx-devel>=1.5.6<1.7.4")) 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");