Debian Security Advisory DSA 3629-1 (ntp - security update)

# OpenVAS Vulnerability Test
# $Id: deb_3629.nasl 6608 2017-07-07 12:05:05Z cfischer $
# Auto-generated from advisory DSA 3629-1 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(703629);
    script_version("$Revision: 6608 $");
    script_cve_id("CVE-2015-7974", "CVE-2015-7977", "CVE-2015-7978", "CVE-2015-7979",
                  "CVE-2015-8138", "CVE-2015-8158", "CVE-2016-1547", "CVE-2016-1548",
                  "CVE-2016-1550", "CVE-2016-2516", "CVE-2016-2518");
    script_name("Debian Security Advisory DSA 3629-1 (ntp - security update)");
    script_tag(name: "last_modification", value: "$Date: 2017-07-07 14:05:05 +0200 (Fri, 07 Jul 2017) $");
    script_tag(name:"creation_date", value:"2016-08-02 10:56:41 +0530 (Tue, 02 Aug 2016)");
    script_tag(name:"cvss_base", value:"7.1");
    script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:N/A:C");
    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-3629.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: "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 (jessie),
these problems have been fixed in version 1:4.2.6.p5+dfsg-7+deb8u2.

For the testing distribution (stretch), these problems have been fixed
in version 1:4.2.8p7+dfsg-1.

For the unstable distribution (sid), these problems have been fixed in
version 1:4.2.8p7+dfsg-1.

We recommend that you upgrade your ntp packages.");
    script_tag(name: "summary",   value: "Several vulnerabilities were discovered
in the Network Time Protocol daemon and utility programs:

CVE-2015-7974 
Matt Street discovered that insufficient key validation allows
impersonation attacks between authenticated peers.

CVE-2015-7977CVE-2015-7978Stephen Gray discovered that a NULL pointer dereference
and a buffer overflow in the handling of ntpdc reslist 
commands may
result in denial of service.

CVE-2015-7979 
Aanchal Malhotra discovered that if NTP is configured for broadcast
mode, an attacker can send malformed authentication packets which
break associations with the server for other broadcast clients.

CVE-2015-8138 
Matthew van Gundy and Jonathan Gardner discovered that missing
validation of origin timestamps in ntpd clients may result in denial
of service.

CVE-2015-8158 
Jonathan Gardner discovered that missing input sanitising in ntpq
may result in denial of service.

CVE-2016-1547 
Stephen Gray and Matthew van Gundy discovered that incorrect handling
of crypto NAK packets may result in denial of service.

CVE-2016-1548 
Jonathan Gardner and Miroslav Lichvar discovered that ntpd clients
could be forced to change from basic client/server mode to interleaved
symmetric mode, preventing time synchronisation.

CVE-2016-1550 
Matthew van Gundy, Stephen Gray and Loganaden Velvindron discovered
that timing leaks in the the packet authentication code could result
in recovery of a message digest.

CVE-2016-2516Yihan Lian discovered that duplicate IPs on unconfig 
directives will
trigger an assert.

CVE-2016-2518 
Yihan Lian discovered that an OOB memory access could potentially
crash ntpd.");
    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:"ntp", ver:"1:4.2.8p7+dfsg-1", rls_regex:"DEB9.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ntp-doc", ver:"1:4.2.8p7+dfsg-1", rls_regex:"DEB9.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ntpdate", ver:"1:4.2.8p7+dfsg-1", rls_regex:"DEB9.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ntp", ver:"1:4.2.6.p5+dfsg-7+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ntp-doc", ver:"1:4.2.6.p5+dfsg-7+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ntpdate", ver:"1:4.2.6.p5+dfsg-7+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

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