Debian Security Advisory DSA 3733-1 (apt - security update)

2016-12-13T00:00:00
ID OPENVAS:1361412562310703733
Type openvas
Reporter Copyright (c) 2016 Greenbone Networks GmbH http://greenbone.net
Modified 2017-12-26T00:00:00

Description

Jann Horn of Google Project Zero discovered that APT, the high level package manager, does not properly handle errors when validating signatures on InRelease files. An attacker able to man-in-the-middle HTTP requests to an apt repository that uses InRelease files (clearsigned Release files), can take advantage of this flaw to circumvent the signature of the InRelease file, leading to arbitrary code execution.

                                        
                                            # OpenVAS Vulnerability Test
# $Id: deb_3733.nasl 8247 2017-12-26 13:32:16Z cfischer $
# Auto-generated from advisory DSA 3733-1 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_oid("1.3.6.1.4.1.25623.1.0.703733");
    script_version("$Revision: 8247 $");
    script_cve_id("CVE-2016-1252");
    script_name("Debian Security Advisory DSA 3733-1 (apt - security update)");
    script_tag(name: "last_modification", value: "$Date: 2017-12-26 14:32:16 +0100 (Tue, 26 Dec 2017) $");
    script_tag(name: "creation_date", value: "2016-12-13 00:00:00 +0100 (Tue, 13 Dec 2016)");
    script_tag(name:"cvss_base", value:"4.3");
    script_tag(name:"cvss_base_vector", value:"AV:N/AC:M/Au:N/C:N/I:P/A:N");
    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-3733.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: "apt on Debian Linux");
    script_tag(name: "insight",   value: "This package provides commandline tools
for searching and managing as well as querying information about packages
as a low-level access to all features of the libapt-pkg library.");
    script_tag(name: "solution",  value: "For the stable distribution (jessie),
this problem has been fixed in version 1.0.9.8.4.

For the unstable distribution (sid), this problem has been fixed in
version 1.4~beta2.

We recommend that you upgrade your apt packages.");
    script_tag(name: "summary",   value: "Jann Horn of Google Project Zero discovered
that APT, the high level package manager, does not properly handle errors when
validating signatures on InRelease files. An attacker able to man-in-the-middle
HTTP requests to an apt repository that uses InRelease files
(clearsigned Release files), can take advantage of this flaw to
circumvent the signature of the InRelease file, leading to arbitrary
code execution.");
    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:"apt", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"apt-doc", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"apt-transport-https", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"apt-utils", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapt-inst1.5:amd64", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapt-inst1.5:i386", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libapt-pkg-dev:amd64", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapt-pkg-dev:i386", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}

if ((res = isdpkgvuln(pkg:"libapt-pkg-doc", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapt-pkg4.12:amd64", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}
if ((res = isdpkgvuln(pkg:"libapt-pkg4.12:i386", ver:"1.0.9.8.4", rls_regex:"DEB8.[0-9]+")) != NULL) {
    report += res;
}


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