Debian dla-4852 : clamav - 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-4852. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(371251);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/23");

  script_cve_id(
    "CVE-2026-20031",
    "CVE-2026-20213",
    "CVE-2026-20214",
    "CVE-2026-20215",
    "CVE-2026-20216",
    "CVE-2026-20217",
    "CVE-2026-20243",
    "CVE-2026-20244",
    "CVE-2026-20339",
    "CVE-2026-20345",
    "CVE-2026-20346",
    "CVE-2026-20347",
    "CVE-2026-20348"
  );
  script_xref(name:"IAVB", value:"2026-B-0225");

  script_name(english:"Debian dla-4852 : clamav - 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-4852 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4852-1                [email protected]
    https://www.debian.org/lts/security/               Emilio Pozuelo Monfort
    October 23, 2026                              https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : clamav
    Version        : 1.4.6+dfsg-0+deb12u1
    CVE ID         : CVE-2026-20031 CVE-2026-20213 CVE-2026-20214 CVE-2026-20215
                     CVE-2026-20216 CVE-2026-20217 CVE-2026-20243 CVE-2026-20244
                     CVE-2026-20339 CVE-2026-20345 CVE-2026-20346 CVE-2026-20347
                     CVE-2026-20348
    Debian Bug     : 1043428 1092882 1103001 1120998 1123913 1141347

    Several vulnerabilities have been found in the ClamAV antivirus toolkit,
    which could result in denial of service or possibly other unspecified
    impact when processing maliciously crafted files.

    For Debian 12 bookworm, these problems have been fixed in version
    1.4.6+dfsg-0+deb12u1.

    We recommend that you upgrade your clamav packages.

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

    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.");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/source-package/clamav");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20031");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20213");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20214");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20215");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20216");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20217");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20243");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20244");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20339");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20345");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20346");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20347");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-20348");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bookworm/clamav");
  script_set_attribute(attribute:"solution", value:
"Upgrade the clamav packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2026-20031");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-20348");

  script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2026/03/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/10/23");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/23");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav-base");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav-daemon");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav-doc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav-docs");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav-freshclam");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav-milter");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamav-testfiles");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:clamdscan");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libclamav-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libclamav12");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_set_attribute(attribute:"stig_severity", value:"I");
  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_info2.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': 'clamav', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamav-base', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamav-daemon', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamav-doc', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamav-docs', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamav-freshclam', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamav-milter', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamav-testfiles', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'clamdscan', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'libclamav-dev', 'reference': '1.4.6+dfsg-0+deb12u1'},
    {'release': '12.0', 'prefix': 'libclamav12', 'reference': '1.4.6+dfsg-0+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, 'clamav / clamav-base / clamav-daemon / clamav-doc / clamav-docs / etc');
}