Debian dla-4698 : spice-vdagent - 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-4698. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(329313);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/24");

  script_cve_id("CVE-2026-57965", "CVE-2026-57966");

  script_name(english:"Debian dla-4698 : spice-vdagent - 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 a package installed that is affected by multiple vulnerabilities as referenced in the
dla-4698 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4698-1                [email protected]
    https://www.debian.org/lts/security/                          Abhijith PA
    July 24, 2026                                 https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : spice-vdagent
    Version        : 0.20.0-2+deb11u1 0.22.1-3+deb12u1
    CVE ID         : CVE-2026-57965 CVE-2026-57966
    Debian Bug     : 1141317 1141318

    Two vulnerabilities were discovered in spice-vdagent, an agent program
    under the SPICE project to ease the remote access to virtual machines
    such as clipboard sharing, auto screen resizing.

    CVE-2026-57965

        A malicious or compromised SPICE host can trigger an integer
        overflow by sending a specially crafted message. This
        vulnerability can lead to a heap buffer overflow, causing the
        spice-vdagent daemon to crash and resulting in a Denial of Service
        (DoS) for the virtual machine.

    CVE-2026-57966

        A path traversal vulnerability was found in spice-vdagent. This
        flaw allows a malicious or compromised SPICE host to write
        arbitrary files to any location on the guest operating
        system. This occurs because the filename provided by the SPICE
        host during file transfers is not properly sanitized before being
        used. An attacker could exploit this to write to sensitive
        locations with the privileges of the spice-vdagent process,
        typically the logged-in user.

    For Debian 11 bullseye, these problems have been fixed in version
    0.20.0-2+deb11u1.

    For Debian 12 bookworm, these problems have been fixed in version
    0.22.1-3+deb12u1.

    We recommend that you upgrade your spice-vdagent packages.

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

    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

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/spice-vdagent
  script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?a05439c4");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-57965");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-57966");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/spice-vdagent");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/spice-vdagent");
  script_set_attribute(attribute:"solution", value:
"Upgrade the spice-vdagent packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:M/C:N/I:P/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:U/C:N/I:L/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-2026-57965");

  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:"2026/06/29");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/24");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/24");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:spice-vdagent");
  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': 'spice-vdagent', 'reference': '0.20.0-2+deb11u1'},
    {'release': '12.0', 'prefix': 'spice-vdagent', 'reference': '0.22.1-3+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_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, 'spice-vdagent');
}