Debian dla-4396 : libpng-dev - 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-4396. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(277605);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id(
    "CVE-2025-64505",
    "CVE-2025-64506",
    "CVE-2025-64720",
    "CVE-2025-65018",
    "CVE-2025-66293"
  );
  script_xref(name:"IAVA", value:"2025-A-0908-S");

  script_name(english:"Debian dla-4396 : libpng-dev - 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-4396 advisory.

    -------------------------------------------------------------------------
    Debian LTS Advisory DLA-4396-1                [email protected]
    https://www.debian.org/lts/security/                         Tobias Frost
    December 07, 2025                             https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : libpng1.6
    Version        : 1.6.37-3+deb11u1
    CVE ID         : CVE-2025-64505 CVE-2025-64506 CVE-2025-64720 CVE-2025-65018
                     CVE-2025-66293
    Debian Bug     : 1121216 1121217 1121218 1121219 1121877

    Multiple vulnerabilties have been found in libpng, the official PNG
    reference library, allowing information disclosure via out-of-bounds
    read, denial of service via application crash, or heap corruption with
    potential for arbitrary code execution.


    CVE-2025-64505

      Heap buffer over-read in png_do_quantize via malformed palette index.

    CVE-2025-64506

      Heap buffer over-read in png_write_image_8bit

    CVE-2025-64720

      Buffer overflow in png_image_read_composite via incorrect palette
      premultiplication

    CVE-2025-65018

      Heap buffer overflow in png_combine_row triggered via
      png_image_finish_read

    CVE-2025-66293

      An out-of-bounds read vulnerability in libpng's simplified API allows
      reading up to 1012 bytes beyond the png_sRGB_base[512] array when
      processing palette PNG images with partial transparency and gamma
      correction

    For Debian 11 bullseye, these problems have been fixed in version
    1.6.37-3+deb11u1.

    We recommend that you upgrade your libpng1.6 packages.

    For the detailed security status of libpng1.6 please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/libpng1.6

    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/libpng1.6");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-64505");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-64506");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-64720");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-65018");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2025-66293");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/bullseye/libpng1.6");
  script_set_attribute(attribute:"solution", value:
"Upgrade the libpng-dev packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:C");
  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:R/S:U/C:L/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-2025-66293");

  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:"2025/11/24");
  script_set_attribute(attribute:"patch_publication_date", value:"2025/12/07");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/08");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpng-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpng-tools");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpng16-16");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libpng16-16-udeb");
  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) 2025-2026 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]+", 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': 'libpng-dev', 'reference': '1.6.37-3+deb11u1'},
    {'release': '11.0', 'prefix': 'libpng-tools', 'reference': '1.6.37-3+deb11u1'},
    {'release': '11.0', 'prefix': 'libpng16-16', 'reference': '1.6.37-3+deb11u1'},
    {'release': '11.0', 'prefix': 'libpng16-16-udeb', 'reference': '1.6.37-3+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, 'libpng-dev / libpng-tools / libpng16-16 / libpng16-16-udeb');
}