Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS : Heimdal vulnerabilities (USN-5675-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-5675-1. 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(166109);
  script_version("1.5");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/07/10");

  script_cve_id(
    "CVE-2018-16860",
    "CVE-2019-12098",
    "CVE-2021-3671",
    "CVE-2022-3116"
  );
  script_xref(name:"USN", value:"5675-1");

  script_name(english:"Ubuntu 16.04 ESM / 18.04 LTS / 20.04 LTS : Heimdal vulnerabilities (USN-5675-1)");

  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 16.04 ESM / 18.04 LTS / 20.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-5675-1 advisory.

  - A flaw was found in samba's Heimdal KDC implementation, versions 4.8.x up to, excluding 4.8.12, 4.9.x up
    to, excluding 4.9.8 and 4.10.x up to, excluding 4.10.3, when used in AD DC mode. A man in the middle
    attacker could use this flaw to intercept the request to the KDC and replace the user name (principal) in
    the request with any desired user name (principal) that exists in the KDC effectively obtaining a ticket
    for that principal. (CVE-2018-16860)

  - In the client side of Heimdal before 7.6.0, failure to verify anonymous PKINIT PA-PKINIT-KX key exchange
    permits a man-in-the-middle attack. This issue is in krb5_init_creds_step in lib/krb5/init_creds_pw.c.
    (CVE-2019-12098)

  - A null pointer de-reference was found in the way samba kerberos server handled missing sname in TGS-REQ
    (Ticket Granting Server - Request). An authenticated user could use this flaw to crash the samba server.
    (CVE-2021-3671)

  - The Heimdal Software Kerberos 5 implementation is vulnerable to a null pointer dereferance. An attacker
    with network access to an application that depends on the vulnerable code path can cause the application
    to crash. (CVE-2022-3116)

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-5675-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:S/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:H/PR:L/UI:N/S:U/C:H/I:H/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-2018-16860");

  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:"2019/05/14");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/10/13");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/10/14");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:esm");
  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:heimdal-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heimdal-clients-x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heimdal-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heimdal-kcm");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heimdal-kdc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heimdal-multidev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heimdal-servers");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heimdal-servers-x");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libasn1-8-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libgssapi3-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libhcrypto4-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libhdb9-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheimbase1-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheimntlm0-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libhx509-5-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkadm5clnt7-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkadm5srv8-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkafs0-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkdc2-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libkrb5-26-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libotp0-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libroken18-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsl0-heimdal");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwind0-heimdal");
  script_end_attributes();

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

  script_copyright(english:"Ubuntu Security Notice (C) 2022-2023 Canonical, Inc. / NASL script (C) 2022-2023 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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 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': '16.04', 'pkgname': 'heimdal-clients', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'heimdal-dev', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'heimdal-kcm', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'heimdal-kdc', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'heimdal-multidev', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'heimdal-servers', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libasn1-8-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libgssapi3-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libhcrypto4-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libhdb9-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libheimbase1-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libheimntlm0-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libhx509-5-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libkadm5clnt7-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libkadm5srv8-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libkafs0-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libkdc2-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libkrb5-26-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libotp0-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libroken18-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libsl0-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '16.04', 'pkgname': 'libwind0-heimdal', 'pkgver': '1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm1'},
    {'osver': '18.04', 'pkgname': 'heimdal-clients', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'heimdal-dev', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'heimdal-kcm', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'heimdal-kdc', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'heimdal-multidev', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'heimdal-servers', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libasn1-8-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libgssapi3-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libhcrypto4-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libhdb9-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libheimbase1-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libheimntlm0-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libhx509-5-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libkadm5clnt7-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libkadm5srv8-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libkafs0-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libkdc2-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libkrb5-26-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libotp0-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libroken18-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libsl0-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '18.04', 'pkgname': 'libwind0-heimdal', 'pkgver': '7.5.0+dfsg-1ubuntu0.1'},
    {'osver': '20.04', 'pkgname': 'heimdal-clients', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'heimdal-dev', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'heimdal-kcm', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'heimdal-kdc', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'heimdal-multidev', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'heimdal-servers', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libasn1-8-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libgssapi3-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libhcrypto4-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libhdb9-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libheimbase1-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libheimntlm0-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libhx509-5-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libkadm5clnt7-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libkadm5srv8-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libkafs0-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libkdc2-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libkrb5-26-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libotp0-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libroken18-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libsl0-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'},
    {'osver': '20.04', 'pkgname': 'libwind0-heimdal', 'pkgver': '7.7.0+dfsg-1ubuntu1.1'}
];

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, 'heimdal-clients / heimdal-dev / heimdal-kcm / heimdal-kdc / etc');
}