Debian dla-4642 : u-boot - 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-4642. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(322326);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/24");

  script_cve_id("CVE-2024-42040", "CVE-2026-46728");

  script_name(english:"Debian dla-4642 : u-boot - 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 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4642 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4642-1                [email protected]
    https://www.debian.org/lts/security/                   Andreas Henriksson
    June 23, 2026                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : u-boot
    Version        : 2021.01+dfsg-5+deb11u3 2023.01+dfsg-2+deb12u3
    CVE ID         : CVE-2024-42040 CVE-2026-46728
    Debian Bug     : 1081557 1136954

    Multiple issues where found in u-boot, a cross-platform bootloader for
    embedded systems, which could lead to information leak and signature
    verification bypass.

    CVE-2024-42040

        buffer overread vulnerability in the DHCP implementation

    CVE-2026-46728

        mishandles use of unit addresses in a FIT

    For Debian 11 bullseye, these problems have been fixed in version
    2021.01+dfsg-5+deb11u3.

    For Debian 12 bookworm, these problems have been fixed in version
    2023.01+dfsg-2+deb12u3.

    We recommend that you upgrade your u-boot packages.

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

    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.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/u-boot");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2024-42040");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-46728");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/u-boot");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/u-boot");
  script_set_attribute(attribute:"solution", value:
"Upgrade the u-boot packages.");
  script_set_cvss_base_vector("CVSS2#AV:A/AC:L/Au:N/C:C/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2024-42040");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-46728");

  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:"2024/08/23");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-amlogic");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-exynos");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-imx");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-mvebu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-omap");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-qcom");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-qemu");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-rockchip");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-rpi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-stm32");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-sunxi");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-tegra");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:u-boot-tools");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  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:"^(11)\.[0-9]+|^(12)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 11.0 / 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': '11.0', 'prefix': 'u-boot', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-amlogic', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-exynos', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-imx', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-mvebu', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-omap', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-qcom', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-qemu', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-rockchip', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-rpi', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-sunxi', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-tegra', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '11.0', 'prefix': 'u-boot-tools', 'reference': '2021.01+dfsg-5+deb11u3'},
    {'release': '12.0', 'prefix': 'u-boot', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-amlogic', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-exynos', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-imx', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-mvebu', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-omap', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-qcom', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-qemu', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-rockchip', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-rpi', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-stm32', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-sunxi', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-tegra', 'reference': '2023.01+dfsg-2+deb12u3'},
    {'release': '12.0', 'prefix': 'u-boot-tools', 'reference': '2023.01+dfsg-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_HOLE,
    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, 'u-boot / u-boot-amlogic / u-boot-exynos / u-boot-imx / u-boot-mvebu / etc');
}