Debian dsa-6426 : icinga2 - 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-6426. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(333603);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/08/10");

  script_cve_id(
    "CVE-2025-61907",
    "CVE-2025-61908",
    "CVE-2025-61909",
    "CVE-2026-61550",
    "CVE-2026-61551",
    "CVE-2026-61552"
  );

  script_name(english:"Debian dsa-6426 : icinga2 - 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 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-6426 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6426-1                   [email protected]
    https://www.debian.org/security/                    Sebastiaan Couwenberg
    August 10, 2026                       https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : icinga2
    CVE ID         : CVE-2025-61907 CVE-2025-61908 CVE-2025-61909
                     CVE-2026-61550 CVE-2026-61551 CVE-2026-61552

    Multiple vulnerabilities were discovered in Icinga 2, a monitoring and
    alerting system, which may result in denial of service, information
    disclosure, privilege escalation or the compromise of a monitoring node.

    The fix for CVE-2025-61909 changes /etc/logrotate.d/icinga2, which is a
    configuration file. If it was modified locally, dpkg will not replace it
    and the fix will not take effect. After the upgrade, please make sure the
    postrotate section is updated.

    For the stable distribution (trixie), these problems have been fixed in
    version 2.14.6-1+deb13u1.

    We recommend that you upgrade your icinga2 packages.

    For the detailed security status of icinga2 please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/icinga2

    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/icinga2");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-61907");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-61908");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-61909");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-61550");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-61551");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-61552");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/icinga2");
  script_set_attribute(attribute:"solution", value:
"Upgrade the icinga2 packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:C/I:N/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:L/UI:N/S:U/C:H/I:N/A:N");
  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:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-61907");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2025-61908");

  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:"2025/10/16");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/08/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/08/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:icinga2");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:icinga2-bin");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:icinga2-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:icinga2-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:icinga2-ido-mysql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:icinga2-ido-pgsql");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:vim-icinga2");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Debian 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/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:"^(13)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 13.0', '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': '13.0', 'prefix': 'icinga2', 'reference': '2.14.6-1+deb13u1'},
    {'release': '13.0', 'prefix': 'icinga2-bin', 'reference': '2.14.6-1+deb13u1'},
    {'release': '13.0', 'prefix': 'icinga2-common', 'reference': '2.14.6-1+deb13u1'},
    {'release': '13.0', 'prefix': 'icinga2-doc', 'reference': '2.14.6-1+deb13u1'},
    {'release': '13.0', 'prefix': 'icinga2-ido-mysql', 'reference': '2.14.6-1+deb13u1'},
    {'release': '13.0', 'prefix': 'icinga2-ido-pgsql', 'reference': '2.14.6-1+deb13u1'},
    {'release': '13.0', 'prefix': 'vim-icinga2', 'reference': '2.14.6-1+deb13u1'}
];

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, 'icinga2 / icinga2-bin / icinga2-common / icinga2-doc / etc');
}