Debian Security Advisory DSA 3398-1 (strongswan - security update)

2015-11-16T00:00:00
ID OPENVAS:1361412562310703398
Type openvas
Reporter Copyright (c) 2015 Greenbone Networks GmbH http://greenbone.net
Modified 2019-03-18T00:00:00

Description

Tobias Brunner found an authentication bypass vulnerability in strongSwan, an IKE/IPsec suite.

Due to insufficient validation of its local state the server implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin can be tricked into successfully concluding the authentication without providing valid credentials.

It

                                        
                                            # OpenVAS Vulnerability Test
# $Id: deb_3398.nasl 14278 2019-03-18 14:47:26Z cfischer $
# Auto-generated from advisory DSA 3398-1 using nvtgen 1.0
# Script version: 1.0
#
# Author:
# Greenbone Networks
#
# Copyright:
# Copyright (c) 2015 Greenbone Networks GmbH http://greenbone.net
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (c) the respective author(s)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
#

if(description)
{
  script_oid("1.3.6.1.4.1.25623.1.0.703398");
  script_version("$Revision: 14278 $");
  script_cve_id("CVE-2015-8023");
  script_name("Debian Security Advisory DSA 3398-1 (strongswan - security update)");
  script_tag(name:"last_modification", value:"$Date: 2019-03-18 15:47:26 +0100 (Mon, 18 Mar 2019) $");
  script_tag(name:"creation_date", value:"2015-11-16 00:00:00 +0100 (Mon, 16 Nov 2015)");
  script_tag(name:"cvss_base", value:"5.0");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:N/I:P/A:N");
  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  script_xref(name:"URL", value:"http://www.debian.org/security/2015/dsa-3398.html");

  script_category(ACT_GATHER_INFO);
  script_copyright("Copyright (c) 2015 Greenbone Networks GmbH http://greenbone.net");
  script_family("Debian Local Security Checks");
  script_dependencies("gather-package-list.nasl");
  script_mandatory_keys("ssh/login/debian_linux", "ssh/login/packages", re:"ssh/login/release=DEB(7|9|8)");
  script_tag(name:"affected", value:"strongswan on Debian Linux");
  script_tag(name:"solution", value:"For the oldstable distribution (wheezy),
this problem has been fixed in version 4.5.2-1.5+deb7u8.

For the stable distribution (jessie), this problem has been fixed in
version 5.2.1-6+deb8u2.

For the testing distribution (stretch), this problem has been fixed
in version 5.3.3-3.

For the unstable distribution (sid), this problem has been fixed in
version 5.3.3-3.

We recommend that you upgrade your strongswan packages.");
  script_tag(name:"summary", value:"Tobias Brunner found an authentication
bypass vulnerability in strongSwan, an IKE/IPsec suite.

Due to insufficient validation of its local state the server
implementation of the EAP-MSCHAPv2 protocol in the eap-mschapv2 plugin
can be tricked into successfully concluding the authentication without
providing valid credentials.

It's possible to recognize such attacks by looking at the server logs.
The following log message would be seen during the client
authentication:

EAP method EAP_MSCHAPV2 succeeded, no MSK established");
  script_tag(name:"vuldetect", value:"This check tests the installed software
version using the apt package manager.");

  exit(0);
}

include("revisions-lib.inc");
include("pkg-lib-deb.inc");

res = "";
report = "";
if((res = isdpkgvuln(pkg:"libstrongswan", ver:"4.5.2-1.5+deb7u8", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan", ver:"4.5.2-1.5+deb7u8", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-dbg", ver:"4.5.2-1.5+deb7u8", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev1", ver:"4.5.2-1.5+deb7u8", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev2", ver:"4.5.2-1.5+deb7u8", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-nm", ver:"4.5.2-1.5+deb7u8", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-starter", ver:"4.5.2-1.5+deb7u8", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"charon-cmd", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libcharon-extra-plugins", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libstrongswan", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libstrongswan-extra-plugins", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libstrongswan-standard-plugins", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-charon", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-dbg", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ike", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev1", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev2", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-libcharon", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-nm", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-starter", ver:"5.3.3-3", rls:"DEB9")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"charon-cmd", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libcharon-extra-plugins", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libstrongswan", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libstrongswan-extra-plugins", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"libstrongswan-standard-plugins", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-charon", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-dbg", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ike", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev1", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev2", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-libcharon", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-nm", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-starter", ver:"5.2.1-6+deb8u2", rls:"DEB8")) != NULL) {
  report += res;
}

if(report != "") {
  security_message(data:report);
} else if (__pkg_match) {
  exit(99);
}