AlmaLinux 9 : samba (ALSA-2026:25049)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The package checks in this plugin were extracted from
# AlmaLinux Security Advisory ALSA-2026:25049.
##

include('compat.inc');

if (description)
{
  script_id(320648);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/11");

  script_cve_id(
    "CVE-2026-1933",
    "CVE-2026-2340",
    "CVE-2026-3012",
    "CVE-2026-4408",
    "CVE-2026-4480",
    "CVE-2026-40170"
  );
  script_xref(name:"ALSA", value:"2026:25049");
  script_xref(name:"RHSA", value:"2026:25049");

  script_name(english:"AlmaLinux 9 : samba (ALSA-2026:25049)");

  script_set_attribute(attribute:"synopsis", value:
"The remote AlmaLinux host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote AlmaLinux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the
ALSA-2026:25049 advisory.

    * samba: Missing access check on reparse point operations (CVE-2026-1933)
      * samba: vfs_worm does not block directory modification (CVE-2026-2340)
      * samba: group policy certificate enrollment uses <http://> without validation (CVE-2026-3012)
      * samba: Samba: Remote Code Execution in printing subsystem via unescaped job description
    (CVE-2026-4480)
      * ngtcp2: ngtcp2: Denial of service via stack buffer overflow during QUIC handshake (CVE-2026-40170)
      * samba: Remote Code Execution in SAMR (CVE-2026-4408)

Tenable has extracted the preceding description block directly from the AlmaLinux 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://errata.almalinux.org/9/ALSA-2026-25049.html");
  script_set_attribute(attribute:"see_also", value:"https://access.redhat.com/errata/RHSA-2026:25049");
  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:POC/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:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-4480");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");
  script_cwe_id(120, 280, 284, 345, 78);

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/04/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:ldb-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libldb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libldb-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libnetapi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libnetapi-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libsmbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libsmbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libwbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:libwbclient-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python3-ldb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python3-samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python3-samba-dc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:python3-samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-client");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-client-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-common-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-common-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-dc-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-dcerpc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-devel");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-gpupdate");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-krb5-printing");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-ldb-ldap-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-pidl");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-test");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-test-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-usershares");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-vfs-iouring");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-winbind-clients");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-winbind-krb5-locator");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-winbind-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:alma:linux:samba-winexe");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::appstream");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::baseos");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::crb");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::highavailability");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::nfv");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::realtime");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::resilientstorage");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::sap_hana");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:alma:linux:9::supplementary");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Alma 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/local_checks_enabled", "Host/AlmaLinux/release", "Host/AlmaLinux/rpm-list", "Host/cpu");

  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) || 'AlmaLinux' >!< os_product) audit(AUDIT_OS_NOT, 'AlmaLinux');
var os_version = get_kb_item('installed_os/local/SSH/0/version');
if (isnull(os_version)) audit(AUDIT_UNKNOWN_APP_VER, 'AlmaLinux');
if (! preg(pattern:"^9([^0-9]|$)", string:os_version)) audit(AUDIT_OS_NOT, 'AlmaLinux 9.x', 'AlmaLinux ' + os_version);

if (!get_kb_item('Host/AlmaLinux/rpm-list')) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('aarch64' >!< cpu && 'ppc' >!< cpu && 's390' >!< cpu && 'x86_64' >!< cpu && cpu !~ "^i[3-6]86$") audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'AlmaLinux', cpu);

var constraints = [
  {
    'release': '9',
    'pkgs': [
      {'reference':'ldb-tools-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libldb-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libldb-devel-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libnetapi-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libnetapi-devel-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libsmbclient-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libsmbclient-devel-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libwbclient-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'libwbclient-devel-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'python3-ldb-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'python3-samba-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'python3-samba-dc-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'python3-samba-test-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-client-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-client-libs-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-common-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-common-libs-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-common-tools-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-dc-libs-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-dcerpc-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-devel-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-gpupdate-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-krb5-printing-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-ldb-ldap-modules-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-libs-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-pidl-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-test-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-test-libs-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-tools-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-usershares-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-vfs-iouring-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-winbind-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-winbind-clients-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-winbind-krb5-locator-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-winbind-modules-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'},
      {'reference':'samba-winexe-4.23.5-10.el9_8', 'el_string':'el9_8', 'rpm_spec_vers_cmp':TRUE, 'epoch':'0'}
    ]
  }
];

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, 'ldb-tools / libldb / libldb-devel / libnetapi / libnetapi-devel / etc');
}