Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : Bind vulnerabilities (USN-8648-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8648-1. 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(365383);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/13");

  script_cve_id(
    "CVE-2026-10723",
    "CVE-2026-10822",
    "CVE-2026-11331",
    "CVE-2026-11605",
    "CVE-2026-11622",
    "CVE-2026-11721",
    "CVE-2026-12617",
    "CVE-2026-13321"
  );
  script_xref(name:"IAVA", value:"2026-A-0764-S");
  script_xref(name:"USN", value:"8648-1");

  script_name(english:"Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS : Bind vulnerabilities (USN-8648-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-8648-1 advisory.

    It was discovered that Bind incorrectly accepted NSEC3 records whose signer name did not match the owning
    zone. A remote attacker could possibly use this issue to perform NSEC3 impersonation attacks, bypassing
    DNSSEC validation. (CVE-2026-10723)

    It was discovered that Bind incorrectly handled Key Records using the PRIVATEDNS algorithm. A remote
    attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service.
    (CVE-2026-10822)

    It was discovered that Bind incorrectly handled wildcard CNAME expansion in Response Policy Zones. A
    remote attacker could possibly use this issue to bypass configured RPZ policies. (CVE-2026-11331)

    It was discovered that Bind performed unnecessary validation of DNSSEC signed records. A remote attacker
    could possibly use this issue to cause Bind to use excessive resources, leading to a denial of service.
    This issue only affected Ubuntu 26.04 LTS. (CVE-2026-11605)

    It was discovered that Bind incorrectly tracked memory usage in the DNS cache. A remote attacker could
    possibly use this issue to cause Bind to use memory beyond configured limits, leading to a denial of
    service. (CVE-2026-11622)

    It was discovered that Bind incorrectly handled signed wildcard records with label count discrepancies and
    RRSIG validation. A remote attacker could possibly use this issue to perform cache poisoning attacks.
    (CVE-2026-11721)

    It was discovered that Bind incorrectly handled certain CNAME and DNAME record orderings in the resolver.
    A remote attacker could possibly use this issue to cause Bind to crash, resulting in a denial of service.
    (CVE-2026-12617)

    It was discovered that Bind incorrectly validated out-of-zone NSEC next owner names during DNSSEC
    validation. A remote attacker could possibly use this issue to bypass DNSSEC validation. (CVE-2026-13321)

Tenable has extracted the preceding description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-8648-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:C/A:N");
  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:C/C:N/I:H/A:N");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-13321");

  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:"2026/07/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/13");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bind9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bind9-dnsutils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bind9-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bind9-libs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bind9-utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:bind9utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:dnsutils");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  script_end_attributes();

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

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

  script_dependencies("ssh_get_info2.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 (! ('22.04' >< os_release || '24.04' >< os_release || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 22.04 / 24.04 / 26.04', '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': '22.04', 'pkgname': 'bind9', 'pkgver': '1:9.18.39-0ubuntu0.22.04.5', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '22.04', 'pkgname': 'bind9-dnsutils', 'pkgver': '1:9.18.39-0ubuntu0.22.04.5', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '22.04', 'pkgname': 'bind9-host', 'pkgver': '1:9.18.39-0ubuntu0.22.04.5', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '22.04', 'pkgname': 'bind9-libs', 'pkgver': '1:9.18.39-0ubuntu0.22.04.5', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '22.04', 'pkgname': 'bind9-utils', 'pkgver': '1:9.18.39-0ubuntu0.22.04.5', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '22.04', 'pkgname': 'bind9utils', 'pkgver': '1:9.18.39-0ubuntu0.22.04.5', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '22.04', 'pkgname': 'dnsutils', 'pkgver': '1:9.18.39-0ubuntu0.22.04.5', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '24.04', 'pkgname': 'bind9', 'pkgver': '1:9.18.39-0ubuntu0.24.04.6', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '24.04', 'pkgname': 'bind9-dnsutils', 'pkgver': '1:9.18.39-0ubuntu0.24.04.6', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '24.04', 'pkgname': 'bind9-host', 'pkgver': '1:9.18.39-0ubuntu0.24.04.6', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '24.04', 'pkgname': 'bind9-libs', 'pkgver': '1:9.18.39-0ubuntu0.24.04.6', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '24.04', 'pkgname': 'bind9-utils', 'pkgver': '1:9.18.39-0ubuntu0.24.04.6', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '24.04', 'pkgname': 'bind9utils', 'pkgver': '1:9.18.39-0ubuntu0.24.04.6', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '24.04', 'pkgname': 'dnsutils', 'pkgver': '1:9.18.39-0ubuntu0.24.04.6', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '26.04', 'pkgname': 'bind9', 'pkgver': '1:9.20.24-1ubuntu0.2', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11605', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '26.04', 'pkgname': 'bind9-dnsutils', 'pkgver': '1:9.20.24-1ubuntu0.2', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11605', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '26.04', 'pkgname': 'bind9-host', 'pkgver': '1:9.20.24-1ubuntu0.2', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11605', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '26.04', 'pkgname': 'bind9-libs', 'pkgver': '1:9.20.24-1ubuntu0.2', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11605', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']},
    {'osver': '26.04', 'pkgname': 'bind9-utils', 'pkgver': '1:9.20.24-1ubuntu0.2', 'cves': ['CVE-2026-10723', 'CVE-2026-10822', 'CVE-2026-11331', 'CVE-2026-11605', 'CVE-2026-11622', 'CVE-2026-11721', 'CVE-2026-12617', 'CVE-2026-13321']}
];

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_HOLE,
    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, 'bind9 / bind9-dnsutils / bind9-host / bind9-libs / bind9-utils / etc');
}