Debian DSA-4951-1 : bluez - security update

#%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-4951. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(152271);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2021/08/08");

  script_cve_id("CVE-2020-26558", "CVE-2020-27153", "CVE-2021-0129");

  script_name(english:"Debian DSA-4951-1 : bluez - 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 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-4951 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)

  - Improper access control in BlueZ may allow an authenticated user to potentially enable information
    disclosure via adjacent access. (CVE-2021-0129)

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=989614");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/bluez");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/security/2021/dsa-4951");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-26558");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2020-27153");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-0129");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/buster/bluez");
  script_set_attribute(attribute:"solution", value:
"Upgrade the bluez packages.

For the stable distribution (buster), these problems have been fixed in version 5.50-1.2~deb10u2.");
  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:U/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:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2020-27153");

  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:"2020/10/15");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/08/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/08/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluetooth");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluez");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluez-cups");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluez-hcidump");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluez-obexd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluez-test-scripts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bluez-test-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libbluetooth-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libbluetooth3");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:10.0");
  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);

release = get_kb_item('Host/Debian/release');
if ( isnull(release) ) audit(AUDIT_OS_NOT, 'Debian');
release = chomp(release);
if (! preg(pattern:"^(10)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 10.0', 'Debian ' + release);
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);

pkgs = [
    {'release': '10.0', 'prefix': 'bluetooth', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'bluez', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'bluez-cups', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'bluez-hcidump', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'bluez-obexd', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'bluez-test-scripts', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'bluez-test-tools', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'libbluetooth-dev', 'reference': '5.50-1.2~deb10u2'},
    {'release': '10.0', 'prefix': 'libbluetooth3', 'reference': '5.50-1.2~deb10u2'}
];

flag = 0;
foreach package_array ( pkgs ) {
  release = NULL;
  prefix = NULL;
  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_HOLE,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  tested = deb_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');
}