Debian Security Advisory DSA 4389-1 (libu2f-host - security update)

2019-02-11T00:00:00
ID OPENVAS:1361412562310704389
Type openvas
Reporter Copyright (C) 2019 Greenbone Networks GmbH
Modified 2019-07-04T00:00:00

Description

Christian Reitter discovered that libu2f-host, a library implementing the host-side of the U2F protocol, failed to properly check for a buffer overflow. This would allow an attacker with a custom made malicious USB device masquerading as a security key, and physical access to a computer where PAM U2F or an application with libu2f-host integrated, to potentially execute arbitrary code on that computer.

                                        
                                            # Copyright (C) 2019 Greenbone Networks GmbH
# Text descriptions are largely excerpted from the referenced
# advisory, and are Copyright (C) the respective author(s)
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
# 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("1.3.6.1.4.1.25623.1.0.704389");
  script_version("2019-07-04T09:25:28+0000");
  script_cve_id("CVE-2018-20340");
  script_name("Debian Security Advisory DSA 4389-1 (libu2f-host - 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:"2019-02-11 00:00:00 +0100 (Mon, 11 Feb 2019)");
  script_tag(name:"cvss_base", value:"4.6");
  script_tag(name:"cvss_base_vector", value:"AV:L/AC:L/Au:N/C:P/I:P/A:P");
  script_tag(name:"solution_type", value:"VendorFix");
  script_tag(name:"qod_type", value:"package");

  script_xref(name:"URL", value:"https://www.debian.org/security/2019/dsa-4389.html");

  script_category(ACT_GATHER_INFO);

  script_copyright("Copyright (C) 2019 Greenbone Networks GmbH");
  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:"libu2f-host on Debian Linux");
  script_tag(name:"solution", value:"For the stable distribution (stretch), this problem has been fixed in
version 1.1.2-2+deb9u1.

We recommend that you upgrade your libu2f-host packages.");

  script_xref(name:"URL", value:"https://security-tracker.debian.org/tracker/libu2f-host");
  script_tag(name:"summary", value:"Christian Reitter discovered that libu2f-host, a library implementing
the host-side of the U2F protocol, failed to properly check for a
buffer overflow. This would allow an attacker with a custom made
malicious USB device masquerading as a security key, and physical
access to a computer where PAM U2F or an application with libu2f-host
integrated, to potentially execute arbitrary code on that computer.");
  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:"libu2f-host-dev", ver:"1.1.2-2+deb9u1", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"libu2f-host0", ver:"1.1.2-2+deb9u1", rls:"DEB9"))) {
  report += res;
}
if(!isnull(res = isdpkgvuln(pkg:"u2f-host", ver:"1.1.2-2+deb9u1", rls:"DEB9"))) {
  report += res;
}

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