Debian Security Advisory DSA 2869-1 (gnutls26 - incorrect certificate verification)

2014-03-03T00:00:00
ID OPENVAS:702869
Type openvas
Reporter Copyright (c) 2014 Greenbone Networks GmbH http://greenbone.net
Modified 2017-07-20T00:00:00

Description

Nikos Mavrogiannopoulos of Red Hat discovered an X.509 certificate verification issue in GnuTLS, an SSL/TLS library. A certificate validation could be reported successfully even in cases were an error would prevent all verification steps to be performed.

An attacker doing a man-in-the-middle of a TLS connection could use this vulnerability to present a carefully crafted certificate that would be accepted by GnuTLS as valid even if not signed by one of the trusted authorities.

                                        
                                            # OpenVAS Vulnerability Test
# $Id: deb_2869.nasl 6769 2017-07-20 09:56:33Z teissa $
# Auto-generated from advisory DSA 2869-1 using nvtgen 1.0
# Script version: 1.1
#
# 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.
#

tag_affected  = "gnutls26 on Debian Linux";
tag_insight   = "gnutls is a portable library which implements the Transport Layer
Security (TLS) 1.0 and Secure Sockets Layer (SSL) 3.0 protocols.";
tag_solution  = "For the oldstable distribution (squeeze), this problem has been fixed in
version 2.8.6-1+squeeze3.

For the stable distribution (wheezy), this problem has been fixed in
version 2.12.20-8+deb7u1.

For the testing distribution (jessie), this problem has been fixed in
version 2.12.23-13.

For the unstable distribution (sid), this problem has been fixed in
version 2.12.23-13.

We recommend that you upgrade your gnutls26 packages.";
tag_summary   = "Nikos Mavrogiannopoulos of Red Hat discovered an X.509 certificate
verification issue in GnuTLS, an SSL/TLS library. A certificate
validation could be reported successfully even in cases were an error
would prevent all verification steps to be performed.

An attacker doing a man-in-the-middle of a TLS connection could use this
vulnerability to present a carefully crafted certificate that would be
accepted by GnuTLS as valid even if not signed by one of the trusted
authorities.";
tag_vuldetect = "This check tests the installed software version using the apt package manager.";

if(description)
{
    script_id(702869);
    script_version("$Revision: 6769 $");
    script_cve_id("CVE-2014-0092");
    script_name("Debian Security Advisory DSA 2869-1 (gnutls26 - incorrect certificate verification)");
    script_tag(name: "last_modification", value:"$Date: 2017-07-20 11:56:33 +0200 (Thu, 20 Jul 2017) $");
    script_tag(name: "creation_date", value:"2014-03-03 00:00:00 +0100 (Mon, 03 Mar 2014)");
    script_tag(name: "cvss_base", value:"5.8");
    script_tag(name: "cvss_base_vector", value:"AV:N/AC:M/Au:N/C:P/I:P/A:N");

    script_xref(name: "URL", value: "http://www.debian.org/security/2014/dsa-2869.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: tag_affected);
    script_tag(name: "insight",   value: tag_insight);
#    script_tag(name: "impact",    value: tag_impact);
    script_tag(name: "solution",  value: tag_solution);
    script_tag(name: "summary",   value: tag_summary);
    script_tag(name: "vuldetect", value: tag_vuldetect);
    script_tag(name:"qod_type", value:"package");
    script_tag(name:"solution_type", value:"VendorFix");

    exit(0);
}

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

res = "";
report = "";
if ((res = isdpkgvuln(pkg:"gnutls-bin", ver:"2.8.6-1+squeeze3", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls-doc", ver:"2.8.6-1+squeeze3", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"guile-gnutls", ver:"2.8.6-1+squeeze3", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-dev", ver:"2.8.6-1+squeeze3", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26", ver:"2.8.6-1+squeeze3", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26-dbg", ver:"2.8.6-1+squeeze3", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls-bin", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls26-doc", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"guile-gnutls", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-dev", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-openssl27", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26-dbg", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutlsxx27", ver:"2.12.20-8+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls-bin", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls26-doc", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"guile-gnutls", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-dev", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-openssl27", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26-dbg", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutlsxx27", ver:"2.12.20-8+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls-bin", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls26-doc", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"guile-gnutls", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-dev", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-openssl27", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26-dbg", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutlsxx27", ver:"2.12.20-8+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls-bin", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"gnutls26-doc", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"guile-gnutls", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-dev", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls-openssl27", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutls26-dbg", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libgnutlsxx27", ver:"2.12.20-8+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}

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