Debian DSA-4983-1 : neutron - security update

2021-10-11T00:00:00
ID DEBIAN_DSA-4983.NASL
Type nessus
Reporter This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.
Modified 2021-10-11T00:00:00

Description

The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-4983 advisory.

  • A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the IPv6 addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations. Only deployments using the Open vSwitch driver are affected. Source: OpenStack project. Versions before openstack-neutron 15.3.3, openstack-neutron 16.3.1 and openstack-neutron 17.1.1 are affected. (CVE-2021-20267)

  • OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate the hardware addresses of other systems on the network, resulting in denial of service or in some cases possibly interception of traffic intended for other destinations. (CVE-2021-38598)

  • An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1. Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value. (CVE-2021-40085)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

                                        
                                            #%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-4983. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(153993);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/10/11");

  script_cve_id("CVE-2021-20267", "CVE-2021-38598", "CVE-2021-40085");

  script_name(english:"Debian DSA-4983-1 : neutron - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 10 / 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-4983 advisory.

  - A flaw was found in openstack-neutron's default Open vSwitch firewall rules. By sending carefully crafted
    packets, anyone in control of a server instance connected to the virtual switch can impersonate the IPv6
    addresses of other systems on the network, resulting in denial of service or in some cases possibly
    interception of traffic intended for other destinations. Only deployments using the Open vSwitch driver
    are affected. Source: OpenStack project. Versions before openstack-neutron 15.3.3, openstack-neutron
    16.3.1 and openstack-neutron 17.1.1 are affected. (CVE-2021-20267)

  - OpenStack Neutron before 16.4.1, 17.x before 17.1.3, and 18.0.0 allows hardware address impersonation when
    the linuxbridge driver with ebtables-nft is used on a Netfilter-based platform. By sending carefully
    crafted packets, anyone in control of a server instance connected to the virtual switch can impersonate
    the hardware addresses of other systems on the network, resulting in denial of service or in some cases
    possibly interception of traffic intended for other destinations. (CVE-2021-38598)

  - An issue was discovered in OpenStack Neutron before 16.4.1, 17.x before 17.2.1, and 18.x before 18.1.1.
    Authenticated attackers can reconfigure dnsmasq via a crafted extra_dhcp_opts value. (CVE-2021-40085)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version
number.");
  script_set_attribute(attribute:"see_also", value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993398");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/neutron");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4983");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-20267");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-38598");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-40085");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/neutron");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/neutron");
  script_set_attribute(attribute:"solution", value:
"Upgrade the neutron packages.

For the stable distribution (bullseye), this problem has been fixed in version 2");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-38598");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");

  script_set_attribute(attribute:"vuln_publication_date", value:"2021/05/28");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/10/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/10/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-api");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-dhcp-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-l3-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-linuxbridge-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-macvtap-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-metadata-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-metering-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-openvswitch-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-ovn-metadata-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-plugin-nec-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-rpc-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-server");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:neutron-sriov-agent");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-neutron");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2021 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('audit.inc');
include('debian_package.inc');

if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
var release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+|^(11)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0 / 11.0', 'Debian ' + release);
var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Debian', cpu);

var pkgs = [
    {'release': '10.0', 'prefix': 'neutron-api', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-common', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-dhcp-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-doc', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-l3-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-linuxbridge-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-macvtap-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-metadata-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-metering-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-openvswitch-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-ovn-metadata-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-plugin-nec-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-rpc-server', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-server', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'neutron-sriov-agent', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '10.0', 'prefix': 'python3-neutron', 'reference': '2:13.0.7+git.2021.09.27.bace3d1890-0+deb10u1'},
    {'release': '11.0', 'prefix': 'neutron-api', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-common', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-dhcp-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-doc', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-l3-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-linuxbridge-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-macvtap-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-metadata-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-metering-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-openvswitch-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-ovn-metadata-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-plugin-nec-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-rpc-server', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-server', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'neutron-sriov-agent', 'reference': '2:17.2.1-0+deb11u1'},
    {'release': '11.0', 'prefix': 'python3-neutron', 'reference': '2:17.2.1-0+deb11u1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var release = NULL;
  var prefix = NULL;
  var reference = NULL;
  if (!empty_or_null(package_array['release'])) release = package_array['release'];
  if (!empty_or_null(package_array['prefix'])) prefix = package_array['prefix'];
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (release && prefix && reference) {
    if (deb_check(release:release, prefix:prefix, reference:reference)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'neutron-api / neutron-common / neutron-dhcp-agent / neutron-doc / etc');
}