Debian dsa-6076 : 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 dsa-6076. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(278084);
  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 dsa-6076 : 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 12 / 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-6076 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6076-1                   [email protected]
    https://www.debian.org/security/                     Salvatore Bonaccorso
    December 10, 2025                     https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

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

    Several vulnerabilities were reported in the libpng PNG library, which
    could lead to information leaks, denial of service or potentially the
    execution of arbitrary code if a specially crafted image is processed.

    For the oldstable distribution (bookworm), these problems have been fixed
    in version 1.6.39-2+deb12u1.

    For the stable distribution (trixie), these problems have been fixed in
    version 1.6.48-1+deb13u1.

    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 Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: [email protected]

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/bookworm/libpng1.6");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/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:"2025/12/10");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/12/10");

  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:"p-cpe:/a:debian:debian_linux:libpng16-16t64");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:12.0");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:13.0");
  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:"^(12)\.[0-9]+|^(13)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 12.0 / 13.0', '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': 'libpng-dev', 'reference': '1.6.39-2+deb12u1'},
    {'release': '12.0', 'prefix': 'libpng-tools', 'reference': '1.6.39-2+deb12u1'},
    {'release': '12.0', 'prefix': 'libpng16-16', 'reference': '1.6.39-2+deb12u1'},
    {'release': '12.0', 'prefix': 'libpng16-16-udeb', 'reference': '1.6.39-2+deb12u1'},
    {'release': '13.0', 'prefix': 'libpng-dev', 'reference': '1.6.48-1+deb13u1'},
    {'release': '13.0', 'prefix': 'libpng-tools', 'reference': '1.6.48-1+deb13u1'},
    {'release': '13.0', 'prefix': 'libpng16-16-udeb', 'reference': '1.6.48-1+deb13u1'},
    {'release': '13.0', 'prefix': 'libpng16-16t64', 'reference': '1.6.48-1+deb13u1'}
];

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 / etc');
}