Debian dsa-5987 : libunbound-dev - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dsa-5987. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(258047);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/08/27");

  script_cve_id("CVE-2024-8508", "CVE-2024-33655", "CVE-2025-5994");
  script_xref(name:"IAVA", value:"2024-A-0682");

  script_name(english:"Debian dsa-5987 : libunbound-dev - security update");

  script_set_attribute(attribute:"synopsis", value:
"The remote Debian host is missing one or more security-related updates.");
  script_set_attribute(attribute:"description", value:
"The remote Debian 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-5987 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-5987-1                   [email protected]
    https://www.debian.org/security/                       Moritz Muehlenhoff
    August 27, 2025                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : unbound
    CVE ID         : CVE-2024-8508 CVE-2024-33655 CVE-2025-5994

    Multiple security issues were discovered in Unbound, a validating,
    recursive, caching DNS resolver, which may result in denial of service
    or cache poisoning via the rebirthday attack.

    For the oldstable distribution (bookworm), these problems have been fixed
    in version 1.17.1-2+deb12u3.

    We recommend that you upgrade your unbound packages.

    For the detailed security status of unbound please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/unbound

    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: [email protected]

Tenable has extracted the preceding description block directly from the Debian 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://security-tracker.debian.org/tracker/source-package/unbound");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-33655");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-8508");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-5994");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/unbound");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libunbound-dev packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  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:N/I:N/A:L");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_supplemental", value:"CVSS:4.0/R:U/V:C");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-8508");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2025-5994");

  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:"2024/05/09");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/08/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/08/27");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libunbound-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libunbound8");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:python3-unbound");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:unbound");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:unbound-anchor");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:unbound-host");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  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:"Debian Local Security Checks");

  script_copyright(english:"This script is Copyright (C) 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:"^(12)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0', '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': '12.0', 'prefix': 'libunbound-dev', 'reference': '1.17.1-2+deb12u3'},
    {'release': '12.0', 'prefix': 'libunbound8', 'reference': '1.17.1-2+deb12u3'},
    {'release': '12.0', 'prefix': 'python3-unbound', 'reference': '1.17.1-2+deb12u3'},
    {'release': '12.0', 'prefix': 'unbound', 'reference': '1.17.1-2+deb12u3'},
    {'release': '12.0', 'prefix': 'unbound-anchor', 'reference': '1.17.1-2+deb12u3'},
    {'release': '12.0', 'prefix': 'unbound-host', 'reference': '1.17.1-2+deb12u3'}
];

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, 'libunbound-dev / libunbound8 / python3-unbound / unbound / etc');
}