Debian dla-4815 : freecad - 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-4815. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(362867);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/03");

  script_cve_id("CVE-2026-34789", "CVE-2026-73234", "CVE-2026-73235");

  script_name(english:"Debian dla-4815 : freecad - 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
dla-4815 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4815-1                [email protected]
    https://www.debian.org/lts/security/                         Tobias Frost
    October 03, 2026                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : freecad
    Version        : 0.20.2+dfsg1-4+deb12u1
    CVE ID         : CVE-2026-34789 CVE-2026-73234 CVE-2026-73235
    Debian Bug     : 1144349

    Three vulnerabilities were discovered in FreeCAD, an open-source
    multiplatform 3D parametric modeler, which could result in arbitrary
    code execution, arbitrary file writes, and the disclosure of local files
    or triggering of remote network requests.

    CVE-2026-34789

        When restoring a crafted FCStd document, FreeCAD passed an
        attacker-controlled module name to the Python interpreter and thereby
        executed code contained in the imported module. An attacker could
        execute arbitrary Python code with the privileges of the FreeCAD user.

    CVE-2026-73234

        When restoring a crafted FCStd document, FreeCAD used
        attacker-controlled file paths without properly restricting directory
        traversal or absolute paths. An attacker could write arbitrary
        content to files accessible to the FreeCAD user, potentially
        allowing persistence or code execution.

    CVE-2026-73235

        When restoring a crafted FCStd document, FreeCAD processed XML external
        entities without disabling external entity or DTD resolution. An
        attacker could read local files or cause requests to be made to
        remote servers.

    For Debian 12 bookworm, these problems have been fixed in version
    0.20.2+dfsg1-4+deb12u1.

    We recommend that you upgrade your freecad packages.

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

    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/freecad");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-34789");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-73234");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-73235");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/freecad");
  script_set_attribute(attribute:"solution", value:
"Upgrade the freecad packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:C/I:C/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:N/UI:R/S:U/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-2026-73234");

  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:"2026/08/11");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/03");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/03");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:freecad");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:freecad-common");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:freecad-python3");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libfreecad-python3-0.20");
  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:"^(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': 'freecad', 'reference': '0.20.2+dfsg1-4+deb12u1'},
    {'release': '12.0', 'prefix': 'freecad-common', 'reference': '0.20.2+dfsg1-4+deb12u1'},
    {'release': '12.0', 'prefix': 'freecad-python3', 'reference': '0.20.2+dfsg1-4+deb12u1'},
    {'release': '12.0', 'prefix': 'libfreecad-python3-0.20', 'reference': '0.20.2+dfsg1-4+deb12u1'}
];

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, 'freecad / freecad-common / freecad-python3 / libfreecad-python3-0.20');
}