Oracle Linux 9 : httpd (ELSA-2026-59347)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Oracle Linux Security Advisory ELSA-2026-59347.
##

include('compat.inc');

if (description)
{
  script_id(339650);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/26");

  script_cve_id("CVE-2026-29167");

  script_name(english:"Oracle Linux 9 : httpd (ELSA-2026-59347)");

  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-2026-59347 advisory.

    - Resolves: RHEL-190807 - httpd: use-after-free in mod_ldap
      uldap_connection_find via per-directory client cert list
      (CVE-2026-29167)
    - Resolves: RHEL-192752 - mod_proxy_html regression in CVE-2026-34355 fix
    - Resolves: RHEL-186217 - httpd: Apache HTTP Server: Heap-based Buffer Overflow
      via malicious backend servers (CVE-2026-34356)
    - Resolves: RHEL-182578 - httpd: incomplete fix
      for CVE-2023-38709 (CVE-2024-42516)
    - Also addresses CVE-2026-24072, CVE-2026-33006, CVE-2026-42535, CVE-2026-43951,
      CVE-2026-44119, CVE-2026-44186
    - Resolves: RHEL-186186 - httpd: mod_proxy_html buffer handling
      vulnerability (CVE-2026-34355)
    - Resolves: RHEL-175636 - httpd: mod_dav_lock uses wrong lock discovery
      (CVE-2026-29169)
    - Resolves: RHEL-186196 - mod_xml2enc: fix bblen accounting in fix_skipto
      (CVE-2026-42536)
    - Resolves: RHEL-186164 - httpd: fix OCSP write buffer advancement
      bug in mod_ssl (CVE-2026-44185)
    - Resolves: RHEL-184312 - httpd: ap_regname restrict to reasonable captures
      (CVE-2026-44631)
    - Resolves: RHEL-173555 - httpd: Apache HTTP Server mod_proxy_ajp: Arbitrary
      code execution via heap-based buffer overflow (CVE-2026-28780)
    - Resolves: RHEL-175080 - httpd: NULL pointer dereference can cause a child
      process crash (CVE-2026-33007)
    - Resolves: RHEL-175100 - httpd: off-by-one out-of-bounds reads in AJP getter
      functions (CVE-2026-33857)
    - Resolves: RHEL-175028 - httpd: heap-based buffer over-read due to missing
      null-termination check (CVE-2026-34032)

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-2026-59347.html");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/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:N/AC:L/PR:N/UI:N/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-2026-29167");

  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:"2026/06/08");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/26");

  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:httpd");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:httpd-core");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:httpd-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:httpd-filesystem");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:httpd-manual");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:httpd-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mod_ldap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mod_lua");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mod_proxy_html");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mod_session");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:oracle:linux:mod_ssl");
  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':'httpd-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-core-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-devel-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-filesystem-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-manual-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_lua-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_proxy_html-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_session-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-2.4.62-13.0.1.el9_8.6', 'cpu':'aarch64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'httpd-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-core-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-devel-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-filesystem-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-manual-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'httpd-tools-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ldap-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_lua-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_proxy_html-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'},
      {'reference':'mod_session-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE},
      {'reference':'mod_ssl-2.4.62-13.0.1.el9_8.6', 'cpu':'x86_64', 'rpm_spec_vers_cmp':TRUE, 'epoch':'1'}
    ]
  }
];

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, 'httpd / httpd-core / httpd-devel / etc');
}