Debian dla-4292 : 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-4292. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(261334);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2025/09/04");

  script_cve_id("CVE-2025-20128", "CVE-2025-20260");
  script_xref(name:"IAVB", value:"2025-B-0098");

  script_name(english:"Debian dla-4292 : 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 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dla-4292 advisory.

    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4292-1                [email protected]
    https://www.debian.org/lts/security/                      Lucas Kanashiro
    September 04, 2025                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : clamav
    Version        : 1.0.9+dfsg-1~deb11u1
    CVE ID         : CVE-2025-20128 CVE-2025-20260
    Debian Bug     : 1093880 1108046

    A couple of vulnerabilities have been fixed in ClamAV, an anti-virus utility
    for Unix.

    CVE-2025-20128

        The Object Linking and Embedding 2 (OLE2) decryption routine of ClamAV
        could allow an unauthenticated, remote attacker to cause a denial of service
        (DoS) condition on an affected device.

    CVE-2025-20260

        The PDF scanning processes of ClamAV could allow an unauthenticated, remote
        attacker to cause a buffer overflow condition, cause a denial of service (DoS)
        condition, or execute arbitrary code on an affected device.

    For Debian 11 bullseye, these problems have been fixed in version
    1.0.9+dfsg-1~deb11u1.

    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-2025-20128");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-20260");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/clamav");
  script_set_attribute(attribute:"solution", value:
"Upgrade the clamav packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:F/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:F/RL:O/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-20260");

  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:"2025/01/22");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/09/04");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/09/04");

  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-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:libclamav11");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:11.0");
  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) 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': 'clamav', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'clamav-base', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'clamav-daemon', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'clamav-docs', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'clamav-freshclam', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'clamav-milter', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'clamav-testfiles', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'clamdscan', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libclamav-dev', 'reference': '1.0.9+dfsg-1~deb11u1'},
    {'release': '11.0', 'prefix': 'libclamav11', 'reference': '1.0.9+dfsg-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_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, 'clamav / clamav-base / clamav-daemon / clamav-docs / clamav-freshclam / etc');
}