Debian Security Advisory DSA 3108-1 (ntp - security update)

# OpenVAS Vulnerability Test
# $Id: deb_3108.nasl 6750 2017-07-18 09:56:47Z teissa $
# Auto-generated from advisory DSA 3108-1 using nvtgen 1.0
# Script version: 1.0
#
# Author:
# Greenbone Networks
#
# Copyright:
# Copyright (c) 2014 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(703108);
    script_version("$Revision: 6750 $");
    script_cve_id("CVE-2014-9293", "CVE-2014-9294", "CVE-2014-9295", "CVE-2014-9296");
    script_name("Debian Security Advisory DSA 3108-1 (ntp - security update)");
    script_tag(name: "last_modification", value: "$Date: 2017-07-18 11:56:47 +0200 (Tue, 18 Jul 2017) $");
    script_tag(name: "creation_date", value: "2014-12-20 00:00:00 +0100 (Sat, 20 Dec 2014)");
    script_tag(name:"cvss_base", value:"7.5");
    script_tag(name:"cvss_base_vector", value:"AV:N/AC:L/Au:N/C:P/I:P/A:P");
    script_tag(name: "solution_type", value: "VendorFix");

    script_xref(name: "URL", value: "http://www.debian.org/security/2014/dsa-3108.html");


    script_category(ACT_GATHER_INFO);

    script_copyright("Copyright (c) 2014 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: "ntp on Debian Linux");
    script_tag(name: "insight",   value: "NTP, the Network Time Protocol, is used
to keep computer clocks accurate by synchronizing them over the Internet or a local
network, or by following an accurate hardware receiver that interprets GPS,
DCF-77, NIST or similar time signals.");
    script_tag(name: "solution",  value: "For the stable distribution (wheezy),
these problems have been fixed in version 1:4.2.6.p5+dfsg-2+deb7u1.

We recommend that you upgrade your ntp packages.");
    script_tag(name: "summary",   value: "Several vulnerabilities were discovered
in the ntp package, an implementation of the Network Time Protocol.

CVE-2014-9293
ntpd generated a weak key for its internal use, with full administrative privileges.
Attackers could use this key to reconfigure ntpd (or to exploit other
vulnerabilities).

CVE-2014-9294
The ntp-keygen utility generated weak MD5 keys with insufficient entropy.

CVE-2014-9295
ntpd had several buffer overflows (both on the stack and in the data section),
allowing remote authenticated attackers to crash ntpd or potentially execute
arbitrary code.

CVE-2014-9296
The general packet processing function in ntpd did not handle an
error case correctly.

The default ntpd configuration in Debian restricts access to localhost
(and possible the adjacent network in case of IPv6).

Keys explicitly generated by 'ntp-keygen -M' should be regenerated.");

    script_tag(name: "vuldetect", value: "This check tests the installed software
version using the apt package manager.");
    script_tag(name:"qod_type", value:"package");
    exit(0);
}

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

res = "";
report = "";
if ((res = isdpkgvuln(pkg:"ntp", ver:"1:4.2.6.p5+dfsg-2+deb7u1", rls_regex:"DEB7.[0-9]")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ntp-doc", ver:"1:4.2.6.p5+dfsg-2+deb7u1", rls_regex:"DEB7.[0-9]")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ntpdate", ver:"1:4.2.6.p5+dfsg-2+deb7u1", rls_regex:"DEB7.[0-9]")) != NULL) {
    report += res;
}

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