Fedora 35 : heimdal (2022-cbbd105d08)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##
# The descriptive text and package checks in this plugin were
# extracted from Fedora Security Advisory FEDORA-2022-cbbd105d08
#

include('compat.inc');

if (description)
{
  script_id(169244);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2023/09/12");

  script_cve_id(
    "CVE-2021-3671",
    "CVE-2021-44758",
    "CVE-2022-3437",
    "CVE-2022-41916",
    "CVE-2022-42898",
    "CVE-2022-44640"
  );
  script_xref(name:"FEDORA", value:"2022-cbbd105d08");

  script_name(english:"Fedora 35 : heimdal (2022-cbbd105d08)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Fedora host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Fedora 35 host has a package installed that is affected by multiple vulnerabilities as referenced in the
FEDORA-2022-cbbd105d08 advisory.

  - 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)

  - Heimdal is an implementation of ASN.1/DER, PKIX, and Kerberos. Versions prior to 7.7.1 are vulnerable to a
    denial of service vulnerability in Heimdal's PKI certificate validation library, affecting the KDC (via
    PKINIT) and kinit (via PKINIT), as well as any third-party applications using Heimdal's libhx509. Users
    should upgrade to Heimdal 7.7.1 or 7.8. There are no known workarounds for this issue. (CVE-2022-41916)

  - This release fixes the following Security Vulnerabilities:  * CVE-2022-42898 PAC parse integer overflows *
    CVE-2022-3437 Overflows and non-constant time leaks in DES{,3} and arcfour * CVE-2022-41916 Fix Unicode
    normalization read of 1 bytes past end of array * CVE-2021-44758 NULL dereference DoS in SPNEGO acceptors
    * CVE-2021-3671 A null pointer de-reference when handling missing sname in TGS-REQ * CVE-2022-44640
    Heimdal KDC: invalid free in ASN.1 codec  Note that CVE-2022-44640 is a severe vulnerability, possibly a
    10.0 on the Common Vulnerability Scoring System (CVSS) v3.   (CVE-2021-44758, CVE-2022-44640)

  - The vulnerability exists due to a boundary error within the GSSAPI unwrap_des() and unwrap_des3() routines
    of Heimdal. A remote user can send specially crafted data to the application, trigger a heap-based buffer
    overflow and perform a denial of service (DoS) attack. (CVE-2022-3437)

  - krb5: integer overflow vulnerabilities in PAC parsing (CVE-2022-42898)

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://bodhi.fedoraproject.org/updates/FEDORA-2022-cbbd105d08");
  script_set_attribute(attribute:"solution", value:
"Update the affected heimdal package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/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: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-2021-3671");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2022-44640");

  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:"2021/10/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/11/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/12/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:fedoraproject:fedora:35");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:fedoraproject:fedora:heimdal");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2022-2023 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/RedHat/release", "Host/RedHat/rpm-list");

  exit(0);
}


include('rpm.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/RedHat/release');
if (isnull(os_release) || 'Fedora' >!< os_release) audit(AUDIT_OS_NOT, 'Fedora');
var os_ver = pregmatch(pattern: "Fedora.*release ([0-9]+)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Fedora');
os_ver = os_ver[1];
if (! preg(pattern:"^35([^0-9]|$)", string:os_ver)) audit(AUDIT_OS_NOT, 'Fedora 35', 'Fedora ' + os_ver);

if (!get_kb_item('Host/RedHat/rpm-list')) 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, 'Fedora', cpu);

var pkgs = [
    {'reference':'heimdal-7.7.1-3.fc35', 'release':'FC35', 'rpm_spec_vers_cmp':TRUE}
];

var flag = 0;
foreach package_array ( pkgs ) {
  var reference = NULL;
  var _release = NULL;
  var sp = NULL;
  var _cpu = NULL;
  var el_string = NULL;
  var rpm_spec_vers_cmp = NULL;
  var epoch = NULL;
  var allowmaj = NULL;
  if (!empty_or_null(package_array['reference'])) reference = package_array['reference'];
  if (!empty_or_null(package_array['release'])) _release = package_array['release'];
  if (!empty_or_null(package_array['sp'])) sp = package_array['sp'];
  if (!empty_or_null(package_array['cpu'])) _cpu = package_array['cpu'];
  if (!empty_or_null(package_array['el_string'])) el_string = package_array['el_string'];
  if (!empty_or_null(package_array['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = package_array['rpm_spec_vers_cmp'];
  if (!empty_or_null(package_array['epoch'])) epoch = package_array['epoch'];
  if (!empty_or_null(package_array['allowmaj'])) allowmaj = package_array['allowmaj'];
  if (reference && _release) {
    if (rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : rpm_report_get()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'heimdal');
}