Ubuntu 25.04 : Samba vulnerability (USN-7564-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-7564-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(238162);
  script_version("1.2");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id("CVE-2025-0620");
  script_xref(name:"USN", value:"7564-1");
  script_xref(name:"IAVA", value:"2025-A-0397-S");

  script_name(english:"Ubuntu 25.04 : Samba vulnerability (USN-7564-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 25.04 host has packages installed that are affected by a vulnerability as referenced in the USN-7564-1
advisory.

    It was discovered that Samba incorrectly handled certain group membership changes when using Kerberos
    authentication. A remote user could possibly use this issue to continue to access resources after being
    removed by an administrator.

Tenable has extracted the preceding description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-7564-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:M/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:H/PR:H/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-2025-0620");

  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:"2025/06/03");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/06/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/06/11");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.04");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ctdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:ldb-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libldb-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libldb2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libnss-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libpam-winbind");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsmbclient-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libsmbclient0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtalloc-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtalloc2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtdb-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtdb1");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtevent-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libtevent0t64");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwbclient-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libwbclient0");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-ldb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-talloc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-tdb");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:registry-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-ad-dc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-ad-provision");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-common-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-dsdb-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-testsuite");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-vfs-ceph");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-vfs-glusterfs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-vfs-modules");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:samba-vfs-modules-extra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:smbclient");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:tdb-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:winbind");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"II");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2025-2026 Canonical, Inc. / NASL script (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/release", "Host/Debian/dpkg-l");

  exit(0);
}

include('debian_package.inc');

if ( ! get_kb_item('Host/local_checks_enabled') ) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('25.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 25.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) 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) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '25.04', 'pkgname': 'ctdb', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'ldb-tools', 'pkgver': '2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libldb-dev', 'pkgver': '2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libldb2', 'pkgver': '2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libnss-winbind', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libpam-winbind', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libsmbclient-dev', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libsmbclient0', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libtalloc-dev', 'pkgver': '2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libtalloc2', 'pkgver': '2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libtdb-dev', 'pkgver': '2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libtdb1', 'pkgver': '2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libtevent-dev', 'pkgver': '2:0.16.1+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libtevent0t64', 'pkgver': '2:0.16.1+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libwbclient-dev', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'libwbclient0', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'python3-ldb', 'pkgver': '2:2.10.0+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'python3-samba', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'python3-talloc', 'pkgver': '2:2.4.2+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'python3-tdb', 'pkgver': '2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'registry-tools', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-ad-dc', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-ad-provision', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-common', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-common-bin', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-dev', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-dsdb-modules', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-libs', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-testsuite', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-vfs-ceph', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-vfs-glusterfs', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-vfs-modules', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'samba-vfs-modules-extra', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'smbclient', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'tdb-tools', 'pkgver': '2:1.4.12+samba4.21.4+dfsg-1ubuntu3.1'},
    {'osver': '25.04', 'pkgname': 'winbind', 'pkgver': '2:4.21.4+dfsg-1ubuntu3.1'}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'ctdb / ldb-tools / libldb-dev / libldb2 / libnss-winbind / etc');
}