Debian DLA-2827-1 : bluez - LTS 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 dla-2827. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

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

if (description)
{
  script_id(155712);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/22");

  script_cve_id("CVE-2019-8921", "CVE-2019-8922", "CVE-2021-41229");

  script_name(english:"Debian DLA-2827-1 : bluez - LTS 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 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-2827 advisory.

  - An issue was discovered in bluetoothd in BlueZ through 5.48. The vulnerability lies in the handling of a
    SVC_ATTR_REQ by the SDP implementation. By crafting a malicious CSTATE, it is possible to trick the server
    into returning more bytes than the buffer actually holds, resulting in leaking arbitrary heap data. The
    root cause can be found in the function service_attr_req of sdpd-request.c. The server does not check
    whether the CSTATE data is the same in consecutive requests, and instead simply trusts that it is the
    same. (CVE-2019-8921)

  - A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on
    whether there is enough space in the destination buffer. The function simply appends all data passed to
    it. The values of all attributes that are requested are appended to the output buffer. There are no size
    checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is
    large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by
    process_request (in sdpd-request.c), which also allocates the response buffer. (CVE-2019-8922)

  - BlueZ is a Bluetooth protocol stack for Linux. In affected versions a vulnerability exists in
    sdp_cstate_alloc_buf which allocates memory which will always be hung in the singly linked list of cstates
    and will not be freed. This will cause a memory leak over time. The data can be a very large object, which
    can be caused by an attacker continuously sending sdp packets and this may cause the service of the target
    device to crash. (CVE-2021-41229)

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=1000262");
  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/lts/security/2021/dla-2827");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2019-8921");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2019-8922");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-41229");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/bluez");
  script_set_attribute(attribute:"solution", value:
"Upgrade the bluez packages.

For Debian 9 stretch, these problems have been fixed in version 5.43-2+deb9u5.");
  script_set_cvss_base_vector("CVSS2#AV:A/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:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/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-2019-8922");

  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:"2021/11/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2021/11/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2021/11/29");

  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-dbg");
  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:"p-cpe:/a:debian:debian_linux:libbluetooth3-dbg");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2021-2023 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:"^(9)\.[0-9]+", string:release)) audit(AUDIT_OS_NOT, 'Debian 9.0', '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': '9.0', 'prefix': 'bluetooth', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'bluez', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'bluez-cups', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'bluez-dbg', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'bluez-hcidump', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'bluez-obexd', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'bluez-test-scripts', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'bluez-test-tools', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'libbluetooth-dev', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'libbluetooth3', 'reference': '5.43-2+deb9u5'},
    {'release': '9.0', 'prefix': 'libbluetooth3-dbg', 'reference': '5.43-2+deb9u5'}
];

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