Debian Security Advisory DSA 4305-1 (strongswan - security update)

2018-09-24T00:00:00
ID OPENVAS:1361412562310704305
Type openvas
Reporter Copyright (c) 2018 Greenbone Networks GmbH http://greenbone.net
Modified 2019-07-04T00:00:00

Description

Sze Yiu Chau and his team from Purdue University and The University of Iowa found several issues in the gmp plugin for strongSwan, an IKE/IPsec suite.

Problems in the parsing and verification of RSA signatures could lead to a Bleichenbacher-style low-exponent signature forgery in certificates and during IKE authentication.

While the gmp plugin doesn

                                        
                                            ###############################################################################
# OpenVAS Vulnerability Test
#
# Auto-generated from advisory DSA 4305-1 using nvtgen 1.0
# Script version: 1.0
#
# Author:
# Greenbone Networks
#
# Copyright:
# Copyright (c) 2018 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("1.3.6.1.4.1.25623.1.0.704305");
  script_version("2019-07-04T09:25:28+0000");
  script_cve_id("CVE-2018-16151", "CVE-2018-16152");
  script_name("Debian Security Advisory DSA 4305-1 (strongswan - security update)");
  script_tag(name:"last_modification", value:"2019-07-04 09:25:28 +0000 (Thu, 04 Jul 2019)");
  script_tag(name:"creation_date", value:"2018-09-24 00:00:00 +0200 (Mon, 24 Sep 2018)");
  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:"https://www.debian.org/security/2018/dsa-4305.html");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (c) 2018 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=DEB9");
  script_tag(name:"affected", value:"strongswan on Debian Linux");
  script_tag(name:"solution", value:"For the stable distribution (stretch), these problems have been fixed in
version 5.5.1-4+deb9u3.

We recommend that you upgrade your strongswan packages.");

  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/strongswan");
  script_tag(name:"summary", value:"Sze Yiu Chau and his team from Purdue University and The University of Iowa
found several issues in the gmp plugin for strongSwan, an IKE/IPsec suite.

Problems in the parsing and verification of RSA signatures could lead to a
Bleichenbacher-style low-exponent signature forgery in certificates and during
IKE authentication.

While the gmp plugin doesn't allow arbitrary data after the ASN.1 structure
(the original Bleichenbacher attack), the ASN.1 parser is not strict enough and
allows data in specific fields inside the ASN.1 structure.

Only installations using the gmp plugin are affected (on Debian OpenSSL plugin
has priority over GMP one for RSA operations), and only when using keys and
certificates (including ones from CAs) using keys with an exponent e = 3, which
is usually rare in practice.

CVE-2018-16151
The OID parser in the ASN.1 code in gmp allows any number of random bytes
after a valid OID.

CVE-2018-16152
The algorithmIdentifier parser in the ASN.1 code in gmp doesn't enforce a
NULL value for the optional parameter which is not used with any PKCS#1
algorithm.");
  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(!isnull(res = isdpkgvuln(pkg:"charon-cmd", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"charon-systemd", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libcharon-extra-plugins", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libstrongswan", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libstrongswan-extra-plugins", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libstrongswan-standard-plugins", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-charon", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-ike", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-ikev1", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-ikev2", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-libcharon", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-nm", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-pki", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-scepclient", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-starter", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"strongswan-swanctl", ver:"5.5.1-4+deb9u3", rls:"DEB9"))) {
  report += res;
}

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