Ubuntu 18.04 LTS / 20.04 LTS : BlueZ vulnerabilities (USN-4989-1)

#%NASL_MIN_LEVEL 70300
##
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-4989-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

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

if (description)
{
  script_id(150809);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/10/16");

  script_cve_id("CVE-2020-26558", "CVE-2020-27153", "CVE-2021-3588");
  script_xref(name:"USN", value:"4989-1");

  script_name(english:"Ubuntu 18.04 LTS / 20.04 LTS : BlueZ vulnerabilities (USN-4989-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as
referenced in the USN-4989-1 advisory.

  - Bluetooth LE and BR/EDR secure pairing in Bluetooth Core Specification 2.1 through 5.2 may permit a nearby
    man-in-the-middle attacker to identify the Passkey used during pairing (in the Passkey authentication
    procedure) by reflection of the public key and the authentication evidence of the initiating device,
    potentially permitting this attacker to complete authenticated pairing with the responding device using
    the correct Passkey for the pairing session. The attack methodology determines the Passkey value one bit
    at a time. (CVE-2020-26558)

  - In BlueZ before 5.55, a double free was found in the gatttool disconnect_cb() routine from shared/att.c. A
    remote attacker could potentially cause a denial of service or code execution, during service discovery,
    due to a redundant disconnect MGMT event. (CVE-2020-27153)

  - The cli_feat_read_cb() function in src/gatt-database.c does not perform bounds checks on the 'offset'
    variable before using it as an index into an array for reading. (CVE-2021-3588)

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-4989-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-27153");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2020/10/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/06/16");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/06/16");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bluetooth");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bluez");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bluez-cups");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bluez-hcidump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bluez-obexd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bluez-tests");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libbluetooth-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libbluetooth3");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2021-2023 Canonical, Inc. / NASL script (C) 2021-2023 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 (! ('18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 18.04 / 20.04', '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': '18.04', 'pkgname': 'bluetooth', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '18.04', 'pkgname': 'bluez', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '18.04', 'pkgname': 'bluez-cups', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '18.04', 'pkgname': 'bluez-hcidump', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '18.04', 'pkgname': 'bluez-obexd', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '18.04', 'pkgname': 'bluez-tests', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '18.04', 'pkgname': 'libbluetooth-dev', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '18.04', 'pkgname': 'libbluetooth3', 'pkgver': '5.48-0ubuntu3.5'},
    {'osver': '20.04', 'pkgname': 'bluetooth', 'pkgver': '5.53-0ubuntu3.2'},
    {'osver': '20.04', 'pkgname': 'bluez', 'pkgver': '5.53-0ubuntu3.2'},
    {'osver': '20.04', 'pkgname': 'bluez-cups', 'pkgver': '5.53-0ubuntu3.2'},
    {'osver': '20.04', 'pkgname': 'bluez-hcidump', 'pkgver': '5.53-0ubuntu3.2'},
    {'osver': '20.04', 'pkgname': 'bluez-obexd', 'pkgver': '5.53-0ubuntu3.2'},
    {'osver': '20.04', 'pkgname': 'bluez-tests', 'pkgver': '5.53-0ubuntu3.2'},
    {'osver': '20.04', 'pkgname': 'libbluetooth-dev', 'pkgver': '5.53-0ubuntu3.2'},
    {'osver': '20.04', 'pkgname': 'libbluetooth3', 'pkgver': '5.53-0ubuntu3.2'}
];

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_HOLE,
    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, 'bluetooth / bluez / bluez-cups / bluez-hcidump / bluez-obexd / etc');
}