Debian Security Advisory DSA 3649-1 (gnupg - security update)

# OpenVAS Vulnerability Test
# $Id: deb_3649.nasl 6608 2017-07-07 12:05:05Z cfischer $
# Auto-generated from advisory DSA 3649-1 using nvtgen 1.0
# Script version: 1.0
#
# Author:
# Greenbone Networks
#
# Copyright:
# Copyright (c) 2016 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_id(703649);
    script_version("$Revision: 6608 $");
    script_cve_id("CVE-2016-6313");
    script_name("Debian Security Advisory DSA 3649-1 (gnupg - security update)");
    script_tag(name: "last_modification", value: "$Date: 2017-07-07 14:05:05 +0200 (Fri, 07 Jul 2017) $");
    script_tag(name: "creation_date", value: "2016-08-17 00:00:00 +0200 (Wed, 17 Aug 2016)");
    script_tag(name:"cvss_base", value:"5.0");
    script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/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/2016/dsa-3649.html");


    script_category(ACT_GATHER_INFO);

    script_copyright("Copyright (c) 2016 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");
    script_tag(name: "affected",  value: "gnupg on Debian Linux");
    script_tag(name: "insight",   value: "GnuPG is GNU's tool for secure
communication and data storage. It can be used to encrypt data and to create
digital signatures. It includes an advanced key management facility and is
compliant with the proposed OpenPGP Internet standard as described in RFC
4880.");
    script_tag(name: "solution",  value: "For the stable distribution (jessie),
this problem has been fixed in version 1.4.18-7+deb8u2.

We recommend that you upgrade your gnupg packages.");
    script_tag(name: "summary",   value: "Felix Doerre and Vladimir Klebanov from
the Karlsruhe Institute of Technology discovered a flaw in the mixing functions of
GnuPG's random number generator. An attacker who obtains 4640 bits from the RNG can
trivially predict the next 160 bits of output.

A first analysis on the impact of this bug for GnuPG shows that existing
RSA keys are not weakened. For DSA and Elgamal keys it is also unlikely
that the private key can be predicted from other public information.");
    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:"gnupg", ver:"1.4.18-7+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnupg-curl", ver:"1.4.18-7+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gpgv", ver:"1.4.18-7+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gpgv-win32", ver:"1.4.18-7+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if (report != "") {
    security_message(data:report);
} else if (__pkg_match) {
    exit(99); # Not vulnerable.
}