Vulnerabilities > CVE-2006-1629 - Remote Code Execution vulnerability in Openvpn and Openvpn Access Server

#%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Mandrake Linux Security Advisory MDKSA-2006:069. 
# The text itself is copyright (C) Mandriva S.A.
#

include("compat.inc");

if (description)
{
  script_id(21206);
  script_version ("1.15");
  script_cvs_date("Date: 2019/08/02 13:32:48");

  script_cve_id("CVE-2006-1629");
  script_xref(name:"MDKSA", value:"2006:069");

  script_name(english:"Mandrake Linux Security Advisory : openvpn (MDKSA-2006:069)");
  script_summary(english:"Checks rpm output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Mandrake Linux host is missing a security update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"A vulnerability in OpenVPN 2.0 through 2.0.5 allows a malicious server
to execute arbitrary code on the client by using setenv with the
LD_PRELOAD environment variable.

Updated packages have been patched to correct this issue by removing
setenv support."
  );
  script_set_attribute(
    attribute:"solution", 
    value:"Update the affected openvpn package."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:mandriva:linux:openvpn");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:mandriva:linux:2006");

  script_set_attribute(attribute:"patch_publication_date", value:"2006/04/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/04/11");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2019 Tenable Network Security, Inc.");
  script_family(english:"Mandriva Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/cpu", "Host/Mandrake/release", "Host/Mandrake/rpm-list");

  exit(0);
}


include("audit.inc");
include("global_settings.inc");
include("rpm.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Mandrake/release")) audit(AUDIT_OS_NOT, "Mandriva / Mandake Linux");
if (!get_kb_item("Host/Mandrake/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);

cpu = get_kb_item("Host/cpu");
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if (cpu !~ "^(amd64|i[3-6]86|x86_64)$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, "Mandriva / Mandrake Linux", cpu);


flag = 0;
if (rpm_check(release:"MDK2006.0", reference:"openvpn-2.0.1-2.2.20060mdk", yank:"mdk")) flag++;


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

#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");

if (description)
{
  script_id(125643);
  script_version("1.4");
  script_cvs_date("Date: 2019/10/31 15:18:52");

  script_cve_id("CVE-2006-1629");
  script_bugtraq_id(17392);

  script_name(english:"OpenVPN Client 2.0.x < 2.0.6 Remote Code Execution Vulnerability");
  script_summary(english:"Checks the version of OpenVPN.");

  script_set_attribute(attribute:"synopsis", value:
"An application on the remote Windows host is affected by a remote 
  code execution vulnerability");
  script_set_attribute(attribute:"description", value:
"According to its self-reported version number, the version of OpenVPN client installed on the remote Windows host is 2.0.x 
prior to 2.0.6. It is, therefore, affected by a remote command execution vulnerability. An unauthenticated remote 
attacker can exploit this by deploying a malicious OpenVPN server and executing code on clients' systems by using 
setenv with the LD_PRELOAD environment variable.");
  # https://openvpn.net/community-resources/changelog-for-openvpn-2-0/
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?6534e9a2");
  script_set_attribute(attribute:"solution", value:
"Upgrade to OpenVPN 2.0.6 or later.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/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:L/UI:R/S:U/C:H/I:H/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-2006-1629");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2006/04/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2006/04/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2019/06/03");

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

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

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

  script_dependencies("openvpn_installed.nbin");
  script_require_keys("installed_sw/OpenVPN");

  exit(0);
}

include('vcf.inc');

app_info = vcf::get_app_info(app:'OpenVPN');

constraints = [
  {'min_version': '2.0.0', 'fixed_version': '2.0.6'}
];
vcf::check_version_and_report(app_info:app_info, constraints:constraints, severity:SECURITY_HOLE);

#%NASL_MIN_LEVEL 80502

#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were  
# extracted from Debian Security Advisory DSA-1045. The text 
# itself is copyright (C) Software in the Public Interest, Inc.
#

include("compat.inc");

if (description)
{
  script_id(22587);
  script_version("1.16");
  script_cvs_date("Date: 2019/08/02 13:32:19");

  script_cve_id("CVE-2006-1629");
  script_bugtraq_id(17392);
  script_xref(name:"DSA", value:"1045");

  script_name(english:"Debian DSA-1045-1 : openvpn - design error");
  script_summary(english:"Checks dpkg output for the updated package");

  script_set_attribute(
    attribute:"synopsis", 
    value:"The remote Debian host is missing a security-related update."
  );
  script_set_attribute(
    attribute:"description", 
    value:
"Hendrik Weimer discovered that OpenVPN, the Virtual Private Network
daemon, allows to push environment variables to a client allowing a
malicious VPN server to take over connected clients."
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=360559"
  );
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.debian.org/security/2006/dsa-1045"
  );
  script_set_attribute(
    attribute:"solution", 
    value:
"Upgrade the openvpn package.

The old stable distribution (woody) does not contain openvpn packages.

For the stable distribution (sarge) this problem has been fixed in
version 2.0-1sarge3."
  );
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:openvpn");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:3.1");

  script_set_attribute(attribute:"patch_publication_date", value:"2006/04/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/10/14");
  script_set_attribute(attribute:"vuln_publication_date", value:"2006/04/05");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2019 Tenable Network Security, Inc.");
  script_family(english:"Debian Local Security Checks");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}


include("audit.inc");
include("debian_package.inc");


if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);


flag = 0;
if (deb_check(release:"3.1", prefix:"openvpn", reference:"2.0-1sarge3")) flag++;

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

#%NASL_MIN_LEVEL 80502
#
# (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(21505);
  script_version("1.14");
  script_cvs_date("Date: 2019/08/02 13:32:38");

  script_cve_id("CVE-2006-1629");

  script_name(english:"FreeBSD : openvpn -- LD_PRELOAD code execution on client through malicious or compromised server (be4ccb7b-c48b-11da-ae12-0002b3b60e4c)");
  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:
"Hendrik Weimer reports :

OpenVPN clients are a bit too generous when accepting configuration
options from a server. It is possible to transmit environment
variables to client-side shell scripts. There are some filters in
place to prevent obvious nonsense, however they don't catch the good
old LD_PRELOAD trick. All we need is to put a file onto the client
under a known location (e.g. by returning a specially crafted document
upon web access) and we have a remote root exploit. But since the
attack may only come from authenticated servers, this threat is
greatly reduced."
  );
  # http://www.osreviews.net/reviews/security/openvpn-print
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.osreviews.net/reviews/security/openvpn.print"
  );
  # http://openvpn.net/changelog.html
  script_set_attribute(
    attribute:"see_also",
    value:"https://openvpn.net/community-resources/changelog-for-openvpn-2-1/"
  );
  # http://sourceforge.net/mailarchive/message.php?msg_id=15298074
  script_set_attribute(
    attribute:"see_also",
    value:"https://sourceforge.net/p/gstreamer/mailman/message/15298074/"
  );
  # https://vuxml.freebsd.org/freebsd/be4ccb7b-c48b-11da-ae12-0002b3b60e4c.html
  script_set_attribute(
    attribute:"see_also",
    value:"http://www.nessus.org/u?ed22276a"
  );
  script_set_attribute(attribute:"solution", value:"Update the affected package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C");

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

  script_set_attribute(attribute:"vuln_publication_date", value:"2006/04/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2006/04/05");
  script_set_attribute(attribute:"plugin_publication_date", value:"2006/05/13");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_copyright(english:"This script is Copyright (C) 2006-2019 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:"openvpn>=2.0<2.0.6")) 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");