Debian Security Advisory DSA 3282-1 (strongswan - security update)

2015-06-08T00:00:00
ID OPENVAS:1361412562310703282
Type openvas
Reporter Copyright (c) 2015 Greenbone Networks GmbH http://greenbone.net
Modified 2019-03-18T00:00:00

Description

Alexander E. Patrakov discovered an issue in strongSwan, an IKE/IPsec suite used to establish IPsec protected links.

When an IKEv2 client authenticates the server with certificates and the client authenticates itself to the server using pre-shared key or EAP, the constraints on the server certificate are only enforced by the client after all authentication steps are completed successfully. A rogue server which can authenticate using a valid certificate issued by any CA trusted by the client could trick the user into continuing the authentication, revealing the username and password digest (for EAP) or even the cleartext password (if EAP-GTC is accepted).

                                        
                                            # OpenVAS Vulnerability Test
# $Id: deb_3282.nasl 14278 2019-03-18 14:47:26Z cfischer $
# Auto-generated from advisory DSA 3282-1 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("1.3.6.1.4.1.25623.1.0.703282");
  script_version("$Revision: 14278 $");
  script_cve_id("CVE-2015-4171");
  script_name("Debian Security Advisory DSA 3282-1 (strongswan - security update)");
  script_tag(name:"last_modification", value:"$Date: 2019-03-18 15:47:26 +0100 (Mon, 18 Mar 2019) $");
  script_tag(name:"creation_date", value:"2015-06-08 00:00:00 +0200 (Mon, 08 Jun 2015)");
  script_tag(name:"cvss_base", value:"2.6");
  script_tag(name:"cvss_base_vector", value:"AV:N/AC:H/Au:N/C:P/I:N/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-3282.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=DEB7");
  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+deb7u7.

For the stable distribution (jessie), this problem has been fixed in
version 5.2.1-6+deb8u1.

For the testing distribution (stretch), this problem has been fixed
in version 5.3.1-1.

For the unstable distribution (sid), this problem has been fixed in
version 5.3.1-1.

We recommend that you upgrade your strongswan packages.");
  script_tag(name:"summary", value:"Alexander E. Patrakov discovered an
issue in strongSwan, an IKE/IPsec suite used to establish IPsec protected links.

When an IKEv2 client authenticates the server with certificates and the
client authenticates itself to the server using pre-shared key or EAP,
the constraints on the server certificate are only enforced by the
client after all authentication steps are completed successfully. A
rogue server which can authenticate using a valid certificate issued by
any CA trusted by the client could trick the user into continuing the
authentication, revealing the username and password digest (for EAP) or
even the cleartext password (if EAP-GTC is accepted).");
  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+deb7u7", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan", ver:"4.5.2-1.5+deb7u7", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-dbg", ver:"4.5.2-1.5+deb7u7", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev1", ver:"4.5.2-1.5+deb7u7", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-ikev2", ver:"4.5.2-1.5+deb7u7", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-nm", ver:"4.5.2-1.5+deb7u7", rls:"DEB7")) != NULL) {
  report += res;
}
if((res = isdpkgvuln(pkg:"strongswan-starter", ver:"4.5.2-1.5+deb7u7", rls:"DEB7")) != NULL) {
  report += res;
}

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