Ubuntu 20.04 ESM / 22.04 LTS / 23.04 : Mosquitto vulnerabilities (USN-6492-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-6492-1. 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(186038);
  script_version("1.0");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/11/21");

  script_cve_id(
    "CVE-2021-34431",
    "CVE-2021-34434",
    "CVE-2021-41039",
    "CVE-2023-0809",
    "CVE-2023-3592",
    "CVE-2023-28366"
  );
  script_xref(name:"USN", value:"6492-1");

  script_name(english:"Ubuntu 20.04 ESM / 22.04 LTS / 23.04 : Mosquitto vulnerabilities (USN-6492-1)");

  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 20.04 ESM / 22.04 LTS / 23.04 host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-6492-1 advisory.

  - In Eclipse Mosquitto version 1.6 to 2.0.10, if an authenticated client that had connected with MQTT v5
    sent a crafted CONNECT message to the broker a memory leak would occur, which could be used to provide a
    DoS attack against the broker. (CVE-2021-34431)

  - In Eclipse Mosquitto versions 2.0 to 2.0.11, when using the dynamic security plugin, if the ability for a
    client to make subscriptions on a topic is revoked when a durable client is offline, then existing
    subscriptions for that client are not revoked. (CVE-2021-34434)

  - In versions 1.6 to 2.0.11 of Eclipse Mosquitto, an MQTT v5 client connecting with a large number of user-
    property properties could cause excessive CPU usage, leading to a loss of performance and possible denial
    of service. (CVE-2021-41039)

  - In Mosquitto before 2.0.16, excessive memory is allocated based on malicious initial packets that are not
    CONNECT packets. (CVE-2023-0809)

  - The broker in Eclipse Mosquitto 1.3.2 through 2.x before 2.0.16 has a memory leak that can be abused
    remotely when a client sends many QoS 2 messages with duplicate message IDs, and fails to respond to
    PUBREC commands. This occurs because of mishandling of EAGAIN from the libc send function.
    (CVE-2023-28366)

  - In Mosquitto before 2.0.16, a memory leak occurs when clients send v5 CONNECT packets with a will message
    that contains invalid property types. (CVE-2023-3592)

Note that Nessus has not tested for these issues 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-6492-1");
  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:N/A:N");
  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:N/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-34434");

  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:"2021/07/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2023/11/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2023/11/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:esm");
  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:23.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmosquitto-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmosquitto1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmosquittopp-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libmosquittopp1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mosquitto");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mosquitto-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:mosquitto-dev");
  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) 2023 Canonical, Inc. / NASL script (C) 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 (! ('20.04' >< os_release || '22.04' >< os_release || '23.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 23.04', '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': '20.04', 'pkgname': 'libmosquitto-dev', 'pkgver': '1.6.9-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'libmosquitto1', 'pkgver': '1.6.9-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'libmosquittopp-dev', 'pkgver': '1.6.9-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'libmosquittopp1', 'pkgver': '1.6.9-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'mosquitto', 'pkgver': '1.6.9-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'mosquitto-clients', 'pkgver': '1.6.9-1ubuntu0.1~esm1'},
    {'osver': '20.04', 'pkgname': 'mosquitto-dev', 'pkgver': '1.6.9-1ubuntu0.1~esm1'},
    {'osver': '22.04', 'pkgname': 'libmosquitto-dev', 'pkgver': '2.0.11-1ubuntu1.1'},
    {'osver': '22.04', 'pkgname': 'libmosquitto1', 'pkgver': '2.0.11-1ubuntu1.1'},
    {'osver': '22.04', 'pkgname': 'libmosquittopp-dev', 'pkgver': '2.0.11-1ubuntu1.1'},
    {'osver': '22.04', 'pkgname': 'libmosquittopp1', 'pkgver': '2.0.11-1ubuntu1.1'},
    {'osver': '22.04', 'pkgname': 'mosquitto', 'pkgver': '2.0.11-1ubuntu1.1'},
    {'osver': '22.04', 'pkgname': 'mosquitto-clients', 'pkgver': '2.0.11-1ubuntu1.1'},
    {'osver': '22.04', 'pkgname': 'mosquitto-dev', 'pkgver': '2.0.11-1ubuntu1.1'},
    {'osver': '23.04', 'pkgname': 'libmosquitto-dev', 'pkgver': '2.0.11-1.2ubuntu0.1'},
    {'osver': '23.04', 'pkgname': 'libmosquitto1', 'pkgver': '2.0.11-1.2ubuntu0.1'},
    {'osver': '23.04', 'pkgname': 'libmosquittopp-dev', 'pkgver': '2.0.11-1.2ubuntu0.1'},
    {'osver': '23.04', 'pkgname': 'libmosquittopp1', 'pkgver': '2.0.11-1.2ubuntu0.1'},
    {'osver': '23.04', 'pkgname': 'mosquitto', 'pkgver': '2.0.11-1.2ubuntu0.1'},
    {'osver': '23.04', 'pkgname': 'mosquitto-clients', 'pkgver': '2.0.11-1.2ubuntu0.1'},
    {'osver': '23.04', 'pkgname': 'mosquitto-dev', 'pkgver': '2.0.11-1.2ubuntu0.1'}
];

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, 'libmosquitto-dev / libmosquitto1 / libmosquittopp-dev / etc');
}