Ubuntu 20.04 LTS / 22.04 LTS / 23.10 : OVN vulnerability (USN-6691-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6691-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(191927);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/03/12");

  script_cve_id("CVE-2024-2182");
  script_xref(name:"USN", value:"6691-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 23.10 : OVN vulnerability (USN-6691-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 23.10 host has packages installed that are affected by a vulnerability as
referenced in the USN-6691-1 advisory.

  - A flaw was found in the Open Virtual Network (OVN). In OVN clusters where BFD is used between hypervisors
    for high availability, an attacker can inject specially crafted BFD packets from inside unprivileged
    workloads, including virtual machines or containers, that can trigger a denial of service. (CVE-2024-2182)

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://ubuntu.com/security/notices/USN-6691-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/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:L/UI:N/S:U/C:N/I:N/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-2024-2182");

  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:"2024/03/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2024/03/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/03/12");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:23.10");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-central");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-controller-vtep");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-ic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ovn-ic-db");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2024 Canonical, Inc. / NASL script (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('20.04' >< os_release || '22.04' >< os_release || '23.10' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 23.10', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '20.04', 'pkgname': 'ovn-central', 'pkgver': '20.03.2-0ubuntu0.20.04.5'},
    {'osver': '20.04', 'pkgname': 'ovn-common', 'pkgver': '20.03.2-0ubuntu0.20.04.5'},
    {'osver': '20.04', 'pkgname': 'ovn-controller-vtep', 'pkgver': '20.03.2-0ubuntu0.20.04.5'},
    {'osver': '20.04', 'pkgname': 'ovn-host', 'pkgver': '20.03.2-0ubuntu0.20.04.5'},
    {'osver': '20.04', 'pkgname': 'ovn-ic', 'pkgver': '20.03.2-0ubuntu0.20.04.5'},
    {'osver': '20.04', 'pkgname': 'ovn-ic-db', 'pkgver': '20.03.2-0ubuntu0.20.04.5'},
    {'osver': '22.04', 'pkgname': 'ovn-central', 'pkgver': '22.03.3-0ubuntu0.22.04.2'},
    {'osver': '22.04', 'pkgname': 'ovn-common', 'pkgver': '22.03.3-0ubuntu0.22.04.2'},
    {'osver': '22.04', 'pkgname': 'ovn-controller-vtep', 'pkgver': '22.03.3-0ubuntu0.22.04.2'},
    {'osver': '22.04', 'pkgname': 'ovn-host', 'pkgver': '22.03.3-0ubuntu0.22.04.2'},
    {'osver': '22.04', 'pkgname': 'ovn-ic', 'pkgver': '22.03.3-0ubuntu0.22.04.2'},
    {'osver': '22.04', 'pkgname': 'ovn-ic-db', 'pkgver': '22.03.3-0ubuntu0.22.04.2'},
    {'osver': '23.10', 'pkgname': 'ovn-central', 'pkgver': '23.09.0-1ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'ovn-common', 'pkgver': '23.09.0-1ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'ovn-controller-vtep', 'pkgver': '23.09.0-1ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'ovn-host', 'pkgver': '23.09.0-1ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'ovn-ic', 'pkgver': '23.09.0-1ubuntu0.1'},
    {'osver': '23.10', 'pkgname': 'ovn-ic-db', 'pkgver': '23.09.0-1ubuntu0.1'}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (osver && pkgname && pkgver) {
    if (ubuntu_check(osver:osver, pkgname:pkgname, pkgver:pkgver)) flag++;
  }
}

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : ubuntu_report_get()
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ovn-central / ovn-common / ovn-controller-vtep / ovn-host / ovn-ic / etc');
}