Debian dsa-6523 : heif-gdk-pixbuf - 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-6523. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#

include('compat.inc');

if (description)
{
  script_id(370003);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/10/21");

  script_cve_id(
    "CVE-2026-84384",
    "CVE-2026-84444",
    "CVE-2026-84446",
    "CVE-2026-84447",
    "CVE-2026-84448",
    "CVE-2026-84450",
    "CVE-2026-84451"
  );
  script_xref(name:"IAVB", value:"2026-B-0281");

  script_name(english:"Debian dsa-6523 : heif-gdk-pixbuf - 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 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the
dsa-6523 advisory.

    - -------------------------------------------------------------------------
    Debian Security Advisory DSA-6523-1                   [email protected]
    https://www.debian.org/security/                                  Aron Xu
    September 28, 2026                    https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : libheif
    CVE ID         : CVE-2026-84384 CVE-2026-84444 CVE-2026-84446 CVE-2026-84447
                     CVE-2026-84448 CVE-2026-84450 CVE-2026-84451

    Multiple security issues were discovered in libheif, an ISO/IEC 23008-12
    HEIF and AVIF image file format decoder and encoder, which may result in
    denial of service, the disclosure of sensitive memory contents or,
    potentially, the execution of arbitrary code if a malformed image file is
    processed.

    Besides the CVEs listed above, this update also fixes a number of issues
    tracked upstream as GHSA-x8r2-mggj-j6wr, GHSA-w7mc-p8jc-p853,
    GHSA-9rj8-5mp5-26c9, GHSA-4jqm-2x34-6f6r, GHSA-vg7w-rp49-4fc2,
    GHSA-5w8x-856j-7x7c, GHSA-fqpw-fj22-78w4, GHSA-prgh-72vc-3xmc,
    GHSA-xrp2-63fq-jm8q, GHSA-4rv4-953r-p24q and GHSA-rhgw-q5g8-xjh2, and had
    no CVE assigned when this advisory was published.

    For the stable distribution (trixie), these problems have been fixed in
    version 1.23.4-1~deb13u1.

    We recommend that you upgrade your libheif packages.

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

    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/libheif");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-84384");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-84444");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-84446");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-84447");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-84448");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-84450");
  script_set_attribute(attribute:"see_also", value:"https://security-tracker.debian.org/tracker/CVE-2026-84451");
  script_set_attribute(attribute:"see_also", value:"https://packages.debian.org/source/trixie/libheif");
  script_set_attribute(attribute:"solution", value:
"Upgrade the heif-gdk-pixbuf packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/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-2026-84444");

  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:"2026/09/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/10/21");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:heif-gdk-pixbuf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:heif-thumbnailer");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-aomdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-aomenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-dav1d");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-ffmpegdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-j2kdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-j2kenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-jpegdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-jpegenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-kvazaar");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-libde265");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-rav1e");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-svtenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugin-x265");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif-plugins-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:libheif1");
  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) 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:"^(13)\.[0-9]+", string:debian_release)) audit(AUDIT_OS_NOT, 'Debian 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': '13.0', 'prefix': 'heif-gdk-pixbuf', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'heif-thumbnailer', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-dev', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-examples', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-aomdec', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-aomenc', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-dav1d', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-ffmpegdec', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-j2kdec', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-j2kenc', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-jpegdec', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-jpegenc', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-kvazaar', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-libde265', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-rav1e', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-svtenc', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugin-x265', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif-plugins-all', 'reference': '1.23.4-1~deb13u1'},
    {'release': '13.0', 'prefix': 'libheif1', 'reference': '1.23.4-1~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, 'heif-gdk-pixbuf / heif-thumbnailer / libheif-dev / libheif-examples / etc');
}