Oracle Linux 8 : openssl (ELSA-2026-500498)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2026-500498.
##

include('compat.inc');

if (description)
{
  script_id(372927);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/28");

  script_cve_id("CVE-2026-63072", "CVE-2026-84782");
  script_xref(name:"IAVA", value:"2026-A-0878-S");
  script_xref(name:"IAVA", value:"2026-A-1072");

  script_name(english:"Oracle Linux 8 : openssl (ELSA-2026-500498)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ELSA-2026-500498 advisory.

    - Fix CVE-2026-63072: heap buffer overflow in CMS key unwrapping
      Resolves: RHEL-246295
    - Fix CVE-2026-84782: DTLS Retransmits Handshake Messages From a Stale Buffer Offset
      Resolves: RHEL-264420
    - Fixes CVE-2026-28390: Denial of Service due to NULL pointer dereference in CMS EnvelopedData processing
      Resolves: RHEL-165783
    - Fix CVE-2026-45447: Heap Use-After-Free in OpenSSL PKCS7_verify()
      Resolves: RHEL-180978
    - Fix CVE-2024-4741: Use After Free with SSL_free_buffers
      Resolves: RHEL-180983
    - Fix CVE-2025-69419: Arbitrary code execution due to out-of-bounds write in PKCS#12 processing
      ticket_lifetime_hint exceed 1 week in TLSv1.3 and breaks compliant clients
      Resolves: RHEL-149165
      Resolves: RHEL-142715

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

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://linux.oracle.com/errata/ELSA-2026-500498.html");
  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: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:L/I:N/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-2026-84782");

  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:"2026/08/05");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/28");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-perl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:openssl-static");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

  script_copyright(english:"This script is Copyright (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info2.nasl");
  script_require_keys("Host/OracleLinux", "Host/RedHat/release", "Host/RedHat/rpm-list", "Host/local_checks_enabled");

  exit(0);
}


include('rpm2.inc');

if (!get_kb_item('Host/local_checks_enabled')) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_product = get_kb_item('installed_os/local/SSH/0/product');
if (isnull(os_product) || !pregmatch(pattern: "Oracle (?:Linux Server|Enterprise Linux)", string:os_product)) audit(AUDIT_OS_NOT, 'Oracle Linux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Oracle Linux');
if (! preg(pattern:"^8([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Oracle Linux 8.x', 'Oracle Linux ' + os_version);

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$" && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Oracle Linux', cpu);

var constraints = [
  {
    'release': '8',
    'pkgs': [
      {'reference':'openssl-1.1.1k-18.ksplice1.el8_6', 'cpu':'aarch64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-devel-1.1.1k-18.ksplice1.el8_6', 'cpu':'aarch64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-libs-1.1.1k-18.ksplice1.el8_6', 'cpu':'aarch64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-perl-1.1.1k-18.ksplice1.el8_6', 'cpu':'aarch64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-static-1.1.1k-18.ksplice1.el8_6', 'cpu':'aarch64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-devel-1.1.1k-18.ksplice1.el8_6', 'cpu':'i686', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-libs-1.1.1k-18.ksplice1.el8_6', 'cpu':'i686', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-1.1.1k-18.ksplice1.el8_6', 'cpu':'x86_64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-devel-1.1.1k-18.ksplice1.el8_6', 'cpu':'x86_64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-libs-1.1.1k-18.ksplice1.el8_6', 'cpu':'x86_64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'},
      {'reference':'openssl-perl-1.1.1k-18.ksplice1.el8_6', 'cpu':'x86_64', 'el_string':'ksplice1.el8_6', 'rpm_spec_vers_cmp':TRUE, 'epoch':'2'}
    ]
  }
];

var os_release = get_one_kb_item('installed_os/local/SSH/0/release');
var os_sp = get_one_kb_item('Host/*/minor_release');

var flag = 0;
var reference;
var sp;
var _cpu;
var el_string;
var rpm_spec_vers_cmp;
var epoch;
var allowmaj;
var exists_check;
var cves;
foreach var constraint ( constraints ) {
  # Check that the target release is equal to the affected release
  if (!empty_or_null(constraint['release'])){
    if (constraint['release'] != os_release) continue;
  }
  if (!empty_or_null(constraint['sp'])){
    if (constraint['sp'] != os_sp) continue;
  }
  foreach var pkg ( constraint['pkgs'] ) {
    reference = NULL;
    sp = NULL;
    _cpu = NULL;
    el_string = NULL;
    rpm_spec_vers_cmp = NULL;
    epoch = NULL;
    allowmaj = NULL;
    exists_check = NULL;
    cves = NULL;
    if (!empty_or_null(pkg['reference'])) reference = pkg['reference'];
    if (!empty_or_null(pkg['sp'])) sp = pkg['sp'];
    if (!empty_or_null(pkg['cpu'])) _cpu = pkg['cpu'];
    if (!empty_or_null(pkg['el_string'])) el_string = pkg['el_string'];
    if (!empty_or_null(pkg['rpm_spec_vers_cmp'])) rpm_spec_vers_cmp = pkg['rpm_spec_vers_cmp'];
    if (!empty_or_null(pkg['epoch'])) epoch = pkg['epoch'];
    if (!empty_or_null(pkg['allowmaj'])) allowmaj = pkg['allowmaj'];
    if (!empty_or_null(pkg['exists_check'])) exists_check = pkg['exists_check'];
    if (!empty_or_null(pkg['cves'])) cves = pkg['cves'];
    if (reference &&
        ## (no known rpm to check OR known rpm_exists)
        (!exists_check || rpm_exists(rpm:exists_check)) &&
        rpm_check(sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj, cves:cves)) flag++;
  }
}

if (flag)
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      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, 'openssl / openssl-devel / openssl-libs / etc');
}