Oracle Linux 9 : gdb (ELSA-2026-73426)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2026-73426.
##

include('compat.inc');

if (description)
{
  script_id(362417);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/01");

  script_cve_id("CVE-2026-13732");

  script_name(english:"Oracle Linux 9 : gdb (ELSA-2026-73426)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Oracle Linux host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Oracle Linux 9 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2026-73426 advisory.

    [16.3-3.1.0.1]
    - Merge Oracle patches for ol9-u8.
      Reviewed-by: Jose E. Marchesi <[email protected]>
      Oracle history:
      March-06-2026 Claudiu Zissulescu <[email protected]> - 16.3-3.0.1
      - Merge Oracle patches for ol9-u8.
      Reviewed-by: Jose E. Marchesi <[email protected]>
      August-05-2025 Claudiu Zissulescu <[email protected]> - 16.3-2.0.1
      - Merge Oracle patches for ol9-u7.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      June-24-2025 Claudiu Zissulescu <[email protected]> - 14.2-4.1.0.1
      - Merge Oracle patches for ol9-u6.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      February-18-2025 Claudiu Zissulescu <[email protected]> - 14.2-4.0.1
      - Merge Oracle patches for ol9-u5.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      October-22-2024 Claudiu Zissulescu <[email protected]> - 14.2-3.0.1
      - Merge Oracle patches for ol9-u4.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      April-30-2024 Cupertino Miranda <[email protected]> - 10.2-13.0.1
      - Merge Oracle patches for ol9-u4.
        Reviewed-by: David Faust <[email protected]>
      March-28-2024 Cupertino Miranda <[email protected]> - 10.2-13.0.1
      - Merge Oracle patches for ol9-u4 beta.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      December-14-2023 Cupertino Miranda <[email protected]> - 10.2-11.1.0.1
      - Merge Oracle patches for ol9
        Reviewed-by: Jose E. Marchesi <[email protected]>
      December-14-2023 Cupertino Miranda <[email protected]> - 10.2-11.0.3
      - OraBug 35407694 Interrupting pstack with ctrl+c  prompts for a kill even if process is not spawned by
    gdb
        Reviewed-by: Jose E. Marchesi <[email protected]>
      December-13-2023 Cupertino Miranda <[email protected]> - 10.2-11.0.2
      - OraBug 36055910 Support RDTSCP in RECORD/REPLAY in interpreter mode (record full)
        Reviewed-by: Jose E. Marchesi <[email protected]>
      October-4-2023 Cupertino Miranda <[email protected]> - 10.2-11.0.1
      - Merge Oracle patches for ol9
        Reviewed-by: Jose E. Marchesi <[email protected]>
      October-10-2022 Weimin Pan  <[email protected]> - 10.2-10.0.2
      - Add missing patch gdb-orclbz33627477-redirect-output-crash.patch.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      September-28-2022 Weimin Pan  <[email protected]> - 10.2-10.0.1
      - Forward-port CTF patches.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      April-26-2022 Weimin Pan  <[email protected]> - 10.2-9.0.1
      - Take out fix for (RHBZ 1935517) which disables libctf.
      - Forward-port CTF patches.
        Reviewed-by: Jose E. Marchesi <[email protected]>

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

Note that Nessus has not tested for this issue 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-2026-73426.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:N/UI:R/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-2026-13732");

  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:"2026/08/31");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/01");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:oracle:linux:9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdb-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdb-gdbserver");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdb-headless");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:gdb-minimal");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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_info.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:"^9([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'Oracle Linux 9.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': '9',
    'pkgs': [
      {'reference':'gdb-16.3-3.1.0.1.el9_8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-doc-16.3-3.1.0.1.el9_8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-gdbserver-16.3-3.1.0.1.el9_8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-headless-16.3-3.1.0.1.el9_8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-minimal-16.3-3.1.0.1.el9_8', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-16.3-3.1.0.1.el9_8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-doc-16.3-3.1.0.1.el9_8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-gdbserver-16.3-3.1.0.1.el9_8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-headless-16.3-3.1.0.1.el9_8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-minimal-16.3-3.1.0.1.el9_8', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE}
    ]
  }
];

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, 'gdb / gdb-doc / gdb-gdbserver / etc');
}