Debian dla-4170 : intel-microcode - security update

#%NASL_MIN_LEVEL 80900
#
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory dla-4170. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(236930);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/05/18");

  script_cve_id(
    "CVE-2024-28956",
    "CVE-2024-43420",
    "CVE-2024-45332",
    "CVE-2025-20012",
    "CVE-2025-20054",
    "CVE-2025-20103",
    "CVE-2025-20623",
    "CVE-2025-24495"
  );

  script_name(english:"Debian dla-4170 : intel-microcode - 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 11 host has a package installed that is affected by multiple vulnerabilities as referenced in the
dla-4170 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4170-1                [email protected]
    https://www.debian.org/lts/security/                         Tobias Frost
    May 18, 2025                                  https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : intel-microcode
    Version        : 3.20250512.1~deb11u1
    CVE ID         : CVE-2024-28956 CVE-2024-43420 CVE-2024-45332 CVE-2025-20012
                     CVE-2025-20054 CVE-2025-20103 CVE-2025-20623 CVE-2025-24495
    Debian Bug     : 1105172

    Microcode updates has been released for Intel(R) processors, addressing
    multiple potential vulnerabilties that may allow denial of service or
    information disclosure.

    CVE-2024-28956

        Exposure of Sensitive Information in Shared Microarchitectural
        Structures during Transient Execution for some Intel(R) Processors
        may allow an authenticated user to potentially enable information
        disclosure via local access.

    CVE-2024-43420

        Exposure of sensitive information caused by shared
        microarchitectural predictor state that influences transient
        execution for some Intel Atom(R) processors may allow an
        authenticated user to potentially enable information disclosure via
        local access.

    CVE-2024-45332

        Exposure of sensitive information caused by shared
        microarchitectural predictor state that influences transient
        execution in the indirect branch predictors for some Intel(R)
        Processors may allow an authenticated user to potentially enable
        information disclosure via local access.

    CVE-2025-20012

        Incorrect behavior order for some Intel(R) Core Ultra Processors
        may allow an unauthenticated user to potentially enable information
        disclosure via physical access.

    CVE-2025-20054

        Uncaught exception in the core management mechanism for some
        Intel(R) Processors may allow an authenticated user to potentially
        enable denial of service via local access.

    CVE-2025-20103

        Insufficient resource pool in the core management mechanism for some
        Intel(R) Processors may allow an authenticated user to potentially
        enable denial of service via local access.

    CVE-2025-20623

        Exposure of sensitive information caused by shared
        microarchitectural predictor state that influences transient
        execution for some Intel(R) Core processors (10th Generation) may
        allow an authenticated user to potentially enable information
        disclosure via local access.

    CVE-2025-24495

        Incorrect initialization of resource in the branch prediction unit
        for some Intel(R) Core Ultra Processors may allow an authenticated
        user to potentially enable information disclosure via local access.

    For Debian 11 bullseye, these problems have been fixed in version
    3.20250512.1~deb11u1.

    We recommend that you upgrade your intel-microcode packages.

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

    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
    Attachment:
    signature.asc
    Description: PGP signature

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.");
  # https://security-tracker.debian.org/tracker/source-package/intel-microcode
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?019586d4");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-28956");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-43420");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-45332");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-20012");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-20054");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-20103");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-20623");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-24495");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/intel-microcode");
  script_set_attribute(attribute:"solution", value:
"Upgrade the intel-microcode packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:H/Au:N/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:L/AC:H/PR:L/UI:N/S:C/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:L/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/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-2025-20012");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2025-24495");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2025-24495");

  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:"2025/05/12");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/05/18");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/05/18");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:intel-microcode");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  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) 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:"^(11)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0', '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': '11.0', 'prefix': 'intel-microcode', 'reference': '3.20250512.1~deb11u1'}
];

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, 'intel-microcode');
}