Debian Security Advisory DSA 2894-1 (openssh - security update)

# OpenVAS Vulnerability Test
# $Id: deb_2894.nasl 6735 2017-07-17 09:56:49Z teissa $
# Auto-generated from advisory DSA 2894-1 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.
#

tag_affected  = "openssh on Debian Linux";
tag_solution  = "For the oldstable distribution (squeeze), these problems have been fixed in
version 1:5.5p1-6+squeeze5.

For the stable distribution (wheezy), these problems have been fixed in
version 1:6.0p1-4+deb7u1.

For the unstable distribution (sid), these problems have been fixed in
version 1:6.6p1-1.

We recommend that you upgrade your openssh packages.";
tag_summary   = "Two vulnerabilities were discovered in OpenSSH, an implementation of the
SSH protocol suite. The Common Vulnerabilities and Exposures project
identifies the following problems:

CVE-2014-2532 
Jann Horn discovered that OpenSSH incorrectly handled wildcards in
AcceptEnv lines. A remote attacker could use this issue to trick
OpenSSH into accepting any environment variable that contains the
characters before the wildcard character.

CVE-2014-2653 
Matthew Vernon reported that if a SSH server offers a
HostCertificate that the ssh client doesn't accept, then the client
doesn't check the DNS for SSHFP records. As a consequence a
malicious server can disable SSHFP-checking by presenting a
certificate.

Note that a host verification prompt is still displayed before
connecting.";
tag_vuldetect = "This check tests the installed software version using the apt package manager.";

if(description)
{
    script_id(702894);
    script_version("$Revision: 6735 $");
    script_cve_id("CVE-2014-2532", "CVE-2014-2653");
    script_name("Debian Security Advisory DSA 2894-1 (openssh - security update)");
    script_tag(name: "last_modification", value:"$Date: 2017-07-17 11:56:49 +0200 (Mon, 17 Jul 2017) $");
    script_tag(name: "creation_date", value:"2014-04-05 00:00:00 +0200 (Sat, 05 Apr 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-2894.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: "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:"openssh-client", ver:"1:5.5p1-6+squeeze5", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-server", ver:"1:5.5p1-6+squeeze5", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh", ver:"1:5.5p1-6+squeeze5", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-askpass-gnome", ver:"1:5.5p1-6+squeeze5", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-krb5", ver:"1:5.5p1-6+squeeze5", rls:"DEB6.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-client", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-server", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-askpass-gnome", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-krb5", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.0")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-client", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-server", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-askpass-gnome", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-krb5", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.1")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-client", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-server", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-askpass-gnome", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-krb5", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.2")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-client", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"openssh-server", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-askpass-gnome", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"ssh-krb5", ver:"1:6.0p1-4+deb7u1", rls:"DEB7.3")) != NULL) {
    report += res;
}

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