RHEL 9 : openssl (Unpatched Vulnerability)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory openssl. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(199308);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2024/10/25");

  script_cve_id("CVE-2022-4450", "CVE-2023-3817", "CVE-2023-5678");

  script_name(english:"RHEL 9 : openssl (Unpatched Vulnerability)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat 9 host is affected by multiple vulnerabilities that will not be patched.");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 9 host has one or more packages installed that are affected by multiple
vulnerabilities that have been acknowledged by the vendor but will not be patched.

  - openssl: double free after calling PEM_read_bio_ex (CVE-2022-4450)

  - Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary:
    Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() to check a DH key
    or DH parameters may experience long delays. Where the key or parameters that are being checked have been
    obtained from an untrusted source this may lead to a Denial of Service. The function DH_check() performs
    various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter
    value can also trigger an overly long computation during some of these checks. A correct q value, if
    present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if
    q is larger than p. An application that calls DH_check() and supplies a key or parameters obtained from an
    untrusted source could be vulnerable to a Denial of Service attack. The function DH_check() is itself
    called by a number of other OpenSSL functions. An application calling any of those other functions may
    similarly be affected. The other functions affected by this are DH_check_ex() and EVP_PKEY_param_check().
    Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications when using the -check
    option. The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS
    providers are not affected by this issue. (CVE-2023-3817)

  - Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or
    parameters may be very slow. Impact summary: Applications that use the functions DH_generate_key() to
    generate an X9.42 DH key may experience long delays. Likewise, applications that use DH_check_pub_key(),
    DH_check_pub_key_ex() or EVP_PKEY_public_check() to check an X9.42 DH key or X9.42 DH parameters may
    experience long delays. Where the key or parameters that are being checked have been obtained from an
    untrusted source this may lead to a Denial of Service. While DH_check() performs all the necessary checks
    (as of CVE-2023-3817), DH_check_pub_key() doesn't make any of these checks, and is therefore vulnerable
    for excessively large P and Q parameters. Likewise, while DH_generate_key() performs a check for an
    excessively large P, it doesn't check for an excessively large Q. An application that calls
    DH_generate_key() or DH_check_pub_key() and supplies a key or parameters obtained from an untrusted source
    could be vulnerable to a Denial of Service attack. DH_generate_key() and DH_check_pub_key() are also
    called by a number of other OpenSSL functions. An application calling any of those other functions may
    similarly be affected. The other functions affected by this are DH_check_pub_key_ex(),
    EVP_PKEY_public_check(), and EVP_PKEY_generate(). Also vulnerable are the OpenSSL pkey command line
    application when using the -pubcheck option, as well as the OpenSSL genpkey command line application.
    The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers
    are not affected by this issue. (CVE-2023-5678)

Note that Nessus has not tested for these issues but has instead relied on the package manager's report that the package
is installed.");
  # https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-5535.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4e1eb547");
  script_set_attribute(attribute:"solution", value:
"The vendor has acknowledged the vulnerabilities but no solution has been provided. Refer to the vendor for remediation
guidance.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C");
  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:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2022-4450");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2023/02/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2024/06/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:redhat:enterprise_linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:compat-openssl11");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2024 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm.inc');
include('rhel.inc');

if (!get_kb_item("global_settings/vendor_unpatched"))
exit(0, "Unpatched Vulnerabilities Detection not active.");

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) || 'Red Hat' >!< os_release) audit(AUDIT_OS_NOT, 'Red Hat');
var os_ver = pregmatch(pattern: "Red Hat Enterprise Linux.*release ([0-9]+(\.[0-9]+)?)", string:os_release);
if (isnull(os_ver)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
os_ver = os_ver[1];
if (!rhel_check_release(operator: 'ge', os_version: os_ver, rhel_version: '9')) audit(AUDIT_OS_NOT, 'Red Hat 9.x', 'Red Hat ' + 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 && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

var constraints = [
  {
    'pkgs': [
      {'reference':'compat-openssl11', 'release':'9', 'rpm_spec_vers_cmp':TRUE, 'unpatched_pkg':'compat-openssl11'}
    ]
  }
];


var flag = 0;
foreach var constraint_array ( constraints ) {
  var repo_relative_urls = NULL;
  var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls:repo_relative_urls);
  foreach var pkg ( constraint_array['pkgs'] ) {
    var unpatched_pkg = NULL;
    var _release = NULL;
    var sp = NULL;
    var el_string = NULL;
    var rpm_spec_vers_cmp = NULL;
    var exists_check = NULL;
    var cves = NULL;
    if (!empty_or_null(pkg['unpatched_pkg'])) unpatched_pkg = pkg['unpatched_pkg'];
    if (!empty_or_null(pkg['release'])) _release = 'RHEL' + pkg['release'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (unpatched_pkg &&
        _release &&
        (!exists_check || rpm_exists(release:_release, rpm:exists_check)) &&
        unpatched_package_exists(release:_release, package:unpatched_pkg, cves: cves)) flag++;
  }
}

if (flag)
{
  var extra = NULL;
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : unpatched_packages_report()
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'compat-openssl11');
}