RHEL 9 : Red Hat OpenStack Services on OpenShift 18.0 (erlang) (RHSA-2026:39809)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Red Hat Security Advisory RHSA-2026:39809. The text
# itself is copyright (C) Red Hat, Inc.
##

include('compat.inc');

if (description)
{
  script_id(326996);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/15");

  script_cve_id("CVE-2026-42789", "CVE-2026-42790");
  script_xref(name:"RHSA", value:"2026:39809");

  script_name(english:"RHEL 9 : Red Hat OpenStack Services on OpenShift 18.0 (erlang) (RHSA-2026:39809)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Red Hat host is missing one or more security updates for Red Hat OpenStack Services on OpenShift 18.0
(erlang).");
  script_set_attribute(attribute:"description", value:
"The remote Redhat Enterprise Linux 9 host has packages installed that are affected by multiple vulnerabilities as
referenced in the RHSA-2026:39809 advisory.

    Erlang is a general-purpose programming language and runtime environment.
    Erlang has built-in support for concurrency, distribution and fault
    tolerance. Erlang is used in several large telecommunication systems from
    Ericsson.

    Security Fix(es):

    * Erlang OTP public_key: Certificate chain forgery via improper trust chain
    validation (CVE-2026-42789)

    * Erlang OTP public_key: Certificate validation bypass allows hostname
    spoofing (CVE-2026-42790)

    For more details about the security issue(s), including the impact, a CVSS
    score, acknowledgments, and other related information, refer to the CVE
    page listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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://access.redhat.com/security/updates/classification/#important");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2482093");
  script_set_attribute(attribute:"see_also", value:"https://bugzilla.redhat.com/show_bug.cgi?id=2482286");
  # https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_39809.json
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?b8089919");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:39809");
  script_set_attribute(attribute:"solution", value:
"Update the RHEL Red Hat OpenStack Services on OpenShift 18.0 (erlang) package based on the guidance in RHSA-2026:39809.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N");
  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:R/S:U/C:H/I:H/A:N");
  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:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:N/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-2026-42790");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_cwe_id(295);
  script_set_attribute(attribute:"vendor_severity", value:"Important");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/05/27");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/15");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/15");

  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:erlang");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-asn1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-compiler");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-crypto");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-eldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-erts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-inets");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-kernel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-mnesia");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-os_mon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-parsetools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-public_key");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-runtime_tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-sasl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-snmp");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-ssl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-stdlib");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-syntax_tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:redhat:enterprise_linux:erlang-xmerl");
  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) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

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

  exit(0);
}


include('rpm2.inc');
include('rhel.inc');
include('ksplice.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) || 'Red Hat' >!< os_product) audit(AUDIT_OS_NOT, 'Red Hat');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'Red Hat');
if (!rhel_check_release(operator: 'ge', os_version: os_version, rhel_version: '9')) audit(AUDIT_OS_NOT, 'Red Hat 9.x', 'Red Hat ' + 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$" && 's390' >!< cpu && 'aarch64' >!< cpu && 'ppc' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Red Hat', cpu);

if (get_one_kb_item('Host/ksplice/kernel-cves'))
{
  var livepatch_source = get_one_kb_item('Host/livepatch-kernel-source');
  if (empty_or_null(livepatch_source)) livepatch_source = 'KSplice';
  rm_kb_item(name:'Host/livepatch-kernel-version');

  var cve_list = make_list('CVE-2026-42789', 'CVE-2026-42790');
  if (ksplice_cves_check(cve_list))
  {
    audit(AUDIT_PATCH_INSTALLED, livepatch_source + ' hotfix for RHSA-2026:39809');
  }
  else
  {
    __rpm_report = ksplice_reporting_text();
  }
}

var constraints = [
  {
    'release': '9',
    'repo_relative_urls': [
      'content/beta/layered/rhel9/x86_64/rhoso-edpm/1/debug',
      'content/beta/layered/rhel9/x86_64/rhoso-edpm/1/os',
      'content/beta/layered/rhel9/x86_64/rhoso-edpm/1/source/SRPMS',
      'content/beta/layered/rhel9/x86_64/rhoso-podified/1/debug',
      'content/beta/layered/rhel9/x86_64/rhoso-podified/1/os',
      'content/beta/layered/rhel9/x86_64/rhoso-podified/1/source/SRPMS',
      'content/beta/layered/rhel9/x86_64/rhoso-tools/18/debug',
      'content/beta/layered/rhel9/x86_64/rhoso-tools/18/os',
      'content/beta/layered/rhel9/x86_64/rhoso-tools/18/source/SRPMS',
      'content/beta/layered/rhel9/x86_64/rhoso/18/debug',
      'content/beta/layered/rhel9/x86_64/rhoso/18/os',
      'content/beta/layered/rhel9/x86_64/rhoso/18/source/SRPMS',
      'content/dist/layered/rhel9/x86_64/rhoso-edpm/1.0/debug',
      'content/dist/layered/rhel9/x86_64/rhoso-edpm/1.0/os',
      'content/dist/layered/rhel9/x86_64/rhoso-edpm/1.0/source/SRPMS',
      'content/dist/layered/rhel9/x86_64/rhoso-podified/1.0/debug',
      'content/dist/layered/rhel9/x86_64/rhoso-podified/1.0/os',
      'content/dist/layered/rhel9/x86_64/rhoso-podified/1.0/source/SRPMS',
      'content/dist/layered/rhel9/x86_64/rhoso-tools/18/debug',
      'content/dist/layered/rhel9/x86_64/rhoso-tools/18/os',
      'content/dist/layered/rhel9/x86_64/rhoso-tools/18/source/SRPMS',
      'content/dist/layered/rhel9/x86_64/rhoso/18.0/debug',
      'content/dist/layered/rhel9/x86_64/rhoso/18.0/os',
      'content/dist/layered/rhel9/x86_64/rhoso/18.0/source/SRPMS'
    ],
    'pkgs': [
      {'reference':'erlang-asn1-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-compiler-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-crypto-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-eldap-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-erts-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-inets-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-kernel-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-mnesia-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-os_mon-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-parsetools-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-public_key-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-runtime_tools-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-sasl-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-snmp-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-ssl-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-stdlib-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-syntax_tools-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-tools-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'erlang-xmerl-26.2.5.21-2.el9ost', 'cpu':'x86_64', 'el_string':'el9ost', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

var applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);
if(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);

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 repo_relative_urls;
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;
  }

  if (!empty_or_null(constraint['repo_relative_urls'])) repo_relative_urls = constraint['repo_relative_urls'];

  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 &&
        rhel_decide_repo_relative_url_check(required_repo_url_list:repo_relative_urls) &&
        (applicable_repo_urls || (!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)
{
  var extra = NULL;
  if (isnull(applicable_repo_urls) || !applicable_repo_urls) extra = rpm_report_get() + redhat_report_repo_caveat();
  else extra = rpm_report_get();
  security_report_v4(
      port       : 0,
      severity   : SECURITY_HOLE,
      extra      : extra
  );
  exit(0);
}
else
{
  var tested = pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'erlang-asn1 / erlang-compiler / erlang-crypto / erlang-eldap / etc');
}