Oracle Linux 8 : gdb (ELSA-2026-73425)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2026-73425.
##

include('compat.inc');

if (description)
{
  script_id(377125);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/11/06");

  script_cve_id("CVE-2026-13732");

  script_name(english:"Oracle Linux 8 : gdb (ELSA-2026-73425)");

  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 8 host has packages installed that are affected by a vulnerability as referenced in the
ELSA-2026-73425 advisory.

    [8.2-20.1.0.1]
    - Import gdb-8.2-20.1.el8_10 and forward-port Oracle changes.
      Reviewed-by: Jose E. Marchesi <[email protected]>
      Oracle history:
      Thu Dec 7 2023 Cupertino Miranda <[email protected]> - 8.2-20.0.2
      - OraBug 36055910 Support RDTSCP in RECORD/REPLAY in interpreter mode (record full)
        Reviewed-by: Jose E. Marchesi <[email protected]>
      Wed Oct 4 2023 Cupertino Miranda <[email protected]> - 8.2-20.0.1
      - Forward-port Oracle patches.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      Wed Sep 28 2022 Weimin Pan  <[email protected]> - 8.2-19.0.1
      - Forward-port CTF patches.
        Reviewed-by: Jose E. Marchesi <[email protected]>
      Mon May  2 2022 Weimin Pan  <[email protected]> - 8.2-18.0.3
      - Take out '#ifnarch i386' for CTF patch.
      Fri Apr 29 2022 Nick Alcock <[email protected]> 8.2-18.0.2
      - Add missing upstream CTF patches present in OL8 binutils backport;
        re-merge into one patch for simplicity
      Tue Mar 29 2022 Weimin Pan  <[email protected]> - 8.2-18.0.1
      - Forward-port 'Fix avx512 -m32 support in gdbserver'
      - (Tom de Vries, RH BZ 2011520)
      - Forward-port IBM arch14 updates.
        (Andreas Krebbel, RHBZ 2012818)
        Reviewed-by: Jose E. Marchesi <[email protected]>
      Sun Nov 14 2021 Alex Burmashev <[email protected]> 8.2-16.0.4
      - Do not pack *ctf* libs [Orabug: 33565602]
      Mon Nov  8 2021 Weimin Pan  <[email protected]> - 8.2-16.0.3
      - Fix Orabug 33501071
      Fri Oct 15 2021 Weimin Pan  <[email protected]> - 8.2-16.0.2
      - Add gdb-ctf-fix-enum-type.patch
        Reviewed-by: Jose E. Marchesi <[email protected]>
      Tue Oct  5 2021 Weimin Pan  <[email protected]> - 8.2-16.0.1
      - Forward-port CTF patches:
        gdb-ctf.patch
        gdb-ctf-forward-type.patch
        gdb-ctf-func-args.patch
        gdb-ctf-optout-var.patch
        gdb-ctf-prfunc.patch
        gdb-ctf-upstream1.patch
        Reviewed-by: Elena Zannoni <[email protected]>

    [8.2-20.1.el8]
    - Backport 'Fix out-of-bounds write in read_member_functions'
      (Tom de Vries, RHEL-190110)

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-2026-73425.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:"2026/11/06");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/11/06");

  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: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:"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_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':'gdb-8.2-20.1.0.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-doc-8.2-20.1.0.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-gdbserver-8.2-20.1.0.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-headless-8.2-20.1.0.1.el8_10', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-8.2-20.1.0.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-doc-8.2-20.1.0.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-gdbserver-8.2-20.1.0.1.el8_10', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'gdb-headless-8.2-20.1.0.1.el8_10', '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');
}