Debian DLA-2955-1 : bind9 - LTS security update

#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-2955. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('deprecated_nasl_level.inc');
include('compat.inc');

if (description)
{
  script_id(159072);
  script_version("1.8");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/01/24");

  script_cve_id("CVE-2021-25220");
  script_xref(name:"IAVA", value:"2022-A-0122-S");

  script_name(english:"Debian DLA-2955-1 : bind9 - LTS security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing a security-related update.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 9 host has packages installed that are affected by a vulnerability as referenced in the dla-2955
advisory.

    It was found that bind9, an internet domain name server, was vulnerable to cache poisoning. When using
    forwarders, bogus NS records supplied by, or via, those forwarders may be cached and used by named if it
    needs to recurse for any reason, causing it to obtain and pass on potentially incorrect answers. For
    Debian 9 stretch, this problem has been fixed in version 1:9.10.3.dfsg.P4-12.3+deb9u11. We recommend that
    you upgrade your bind9 packages. For the detailed security status of bind9 please refer to its security
    tracker page at: https://security-tracker.debian.org/tracker/bind9 Further information about Debian LTS
    security advisories, how to apply these updates to your system and frequently asked questions can be found
    at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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://security-tracker.debian.org/tracker/source-package/bind9");
  script_set_attribute(attribute:"see_also", value:"https://www.debian.org/lts/security/2022/dla-2955");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2021-25220");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/stretch/bind9");
  script_set_attribute(attribute:"solution", value:
"Upgrade the bind9 packages.

For Debian 9 stretch, this problem has been fixed in version 1");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:P/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:H/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-2021-25220");

  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:"2022/03/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2022/03/19");
  script_set_attribute(attribute:"plugin_publication_date", value:"2022/03/19");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bind9");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bind9-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bind9-host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:bind9utils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:dnsutils");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:host");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libbind-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libbind-export-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libbind9-140");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libdns-export162");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libdns162");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libirs-export141");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libirs141");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libisc-export160");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libisc160");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libisccc-export140");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libisccc140");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libisccfg-export140");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libisccfg140");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:liblwres141");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:lwresd");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:9.0");
  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:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 2022-2025 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/local_checks_enabled", "Host/Debian/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);
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);

var debian_release = get_kb_item('Host/Debian/release');
if ( isnull(debian_release) ) audit(AUDIT_OS_NOT, 'Debian');
debian_release = chomp(debian_release);
if (! preg(pattern:"^(9)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 9.0', 'Debian ' + debian_release);
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, 'Debian', cpu);

var pkgs = [
    {'release': '9.0', 'prefix': 'bind9', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'bind9-doc', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'bind9-host', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'bind9utils', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'dnsutils', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'host', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libbind-dev', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libbind-export-dev', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libbind9-140', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libdns-export162', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libdns162', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libirs-export141', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libirs141', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libisc-export160', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libisc160', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libisccc-export140', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libisccc140', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libisccfg-export140', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'libisccfg140', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'liblwres141', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'},
    {'release': '9.0', 'prefix': 'lwresd', 'reference': '1:9.10.3.dfsg.P4-12.3+deb9u11'}
];

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

if (flag)
{
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : deb_report_get()
  );
  exit(0);
}
else
{
  var tested = deb_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'bind9 / bind9-doc / bind9-host / bind9utils / dnsutils / host / etc');
}