Debian Security Advisory DSA 3740-1 (samba - security update)

# OpenVAS Vulnerability Test
# $Id: deb_3740.nasl 6608 2017-07-07 12:05:05Z cfischer $
# Auto-generated from advisory DSA 3740-1 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(703740);
    script_version("$Revision: 6608 $");
    script_cve_id("CVE-2016-2119", "CVE-2016-2123", "CVE-2016-2125", "CVE-2016-2126");
    script_name("Debian Security Advisory DSA 3740-1 (samba - security update)");
    script_tag(name: "last_modification", value: "$Date: 2017-07-07 14:05:05 +0200 (Fri, 07 Jul 2017) $");
    script_tag(name: "creation_date", value: "2016-12-19 00:00:00 +0100 (Mon, 19 Dec 2016)");
    script_tag(name: "cvss_base", value: "10.0");
    script_tag(name: "cvss_base_vector", value: "AV:N/AC:L/Au:N/C:C/I:C/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-3740.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: "samba on Debian Linux");
    script_tag(name: "insight",   value: "Samba is an implementation of the
SMB/CIFS protocol for Unix systems, providing support for cross-platform file and
printer sharing with Microsoft Windows, OS X, and other Unix systems. Samba can
also function as an NT4-style domain controller, and can integrate with both NT4
domains and Active Directory realms as a member server.");
    script_tag(name: "solution",  value: "For the stable distribution (jessie),
these problems have been fixed in version 2:4.2.14+dfsg-0+deb8u2. In addition, this
update contains several changes originally targeted for the upcoming jessie point
release.

We recommend that you upgrade your samba packages.");
    script_tag(name: "summary",   value: "Several vulnerabilities have been
discovered in Samba, a SMB/CIFS file, print, and login server for Unix. The Common
Vulnerabilities and Exposures project identifies the following issues:

CVE-2016-2119 
Stefan Metzmacher discovered that client-side SMB2/3 required
signing can be downgraded, allowing a man-in-the-middle attacker to
impersonate a server being connected to by Samba, and return
malicious results.

CVE-2016-2123 
Trend Micro's Zero Day Initiative and Frederic Besler discovered
that the routine ndr_pull_dnsp_name, used to parse data from the
Samba Active Directory ldb database, contains an integer overflow
flaw, leading to an attacker-controlled memory overwrite. An
authenticated user can take advantage of this flaw for remote
privilege escalation.

CVE-2016-2125Simo Sorce of Red Hat discovered that the Samba client code always
requests a forwardable ticket when using Kerberos authentication. A
target server, which must be in the current or trusted domain/realm,
is given a valid general purpose Kerberos Ticket Granting Ticket 

(TGT), which can be used to fully impersonate the authenticated user
or service.

CVE-2016-2126 
Volker Lendecke discovered several flaws in the Kerberos PAC
validation. A remote, authenticated, attacker can cause the winbindd
process to crash using a legitimate Kerberos ticket due to incorrect
handling of the PAC checksum. A local service with access to the
winbindd privileged pipe can cause winbindd to cache elevated access
permissions.");
    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:"ctdb", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libnss-winbind:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libnss-winbind:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libpam-smbpass:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libpam-smbpass:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libpam-winbind:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libpam-winbind:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libparse-pidl-perl", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libsmbclient:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libsmbclient:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libsmbclient-dev:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libsmbclient-dev:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libsmbsharemodes-dev:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libsmbsharemodes-dev:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libsmbsharemodes0:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libsmbsharemodes0:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libwbclient-dev:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libwbclient-dev:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libwbclient0:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libwbclient0:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"python-samba", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"registry-tools", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-common", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-common-bin", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-dbg", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-dev", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-doc", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-dsdb-modules", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-libs:amd64", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-libs:i386", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"samba-testsuite", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"samba-vfs-modules", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"smbclient", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"winbind", ver:"2:4.2.14+dfsg-0+deb8u2", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

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