Ubuntu 26.04 LTS : libheif vulnerabilities (USN-8526-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8526-1. The text
# itself is copyright (C) Canonical, Inc. See
# <https://ubuntu.com/security/notices>. Ubuntu(R) is a registered
# trademark of Canonical, Inc.
##

include('compat.inc');

if (description)
{
  script_id(326250);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/07/10");

  script_cve_id(
    "CVE-2026-47254",
    "CVE-2026-47709",
    "CVE-2026-47714",
    "CVE-2026-48029",
    "CVE-2026-50142"
  );
  script_xref(name:"IAVB", value:"2026-B-0158");
  script_xref(name:"USN", value:"8526-1");

  script_name(english:"Ubuntu 26.04 LTS : libheif vulnerabilities (USN-8526-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing one or more security updates.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in
the USN-8526-1 advisory.

    Xianrui Dong discovered that libheif had an out-of-bounds read in its HEIF sequence track parser. An
    attacker could possibly use this issue to cause a denial of service or obtain sensitive information. This
    issue only affected Ubuntu 26.04 LTS. (CVE-2026-47254)

    Junyi Liu discovered that libheif had a null pointer dereference in its image tiling interface. An
    attacker could possibly use this issue to cause a denial of service. (CVE-2026-47709)

    Calvin Young and Enoch Chow discovered that libheif had an integer overflow in its inline mask size
    calculation. An attacker could possibly use this issue to cause a denial of service or obtain sensitive
    information. (CVE-2026-47714)

    Ariel Koren discovered that libheif had an integer underflow in its grid image tile coordinate transform.
    An attacker could possibly use this issue to cause a denial of service or obtain sensitive information.
    (CVE-2026-48029)

    It was discovered that libheif had a missing bound check in its HEIF sequence parser, allowing unbounded
    heap allocation. An attacker could possibly use this issue to cause a denial of service. (CVE-2026-50142)

Tenable has extracted the preceding description block directly from the Ubuntu 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://ubuntu.com/security/notices/USN-8526-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:C");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/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-2026-48029");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2026-47254");

  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:"2026/06/18");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/07/09");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/07/10");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heif-gdk-pixbuf");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heif-thumbnailer");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:heif-view");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-examples");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-aomdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-aomenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-dav1d");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-ffmpegdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-j2kdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-j2kenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-jpegdec");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-jpegenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-kvazaar");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-libde265");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-rav1e");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-svtenc");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugin-x265");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif-plugins-all");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libheif1");
  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:"Ubuntu Local Security Checks");

  script_copyright(english:"Ubuntu Security Notice (C) 2026 Canonical, Inc. / NASL script (C) 2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("ssh_get_info.nasl");
  script_require_keys("Host/cpu", "Host/Ubuntu", "Host/Ubuntu/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);
var os_release = get_kb_item('Host/Ubuntu/release');
if ( isnull(os_release) ) audit(AUDIT_OS_NOT, 'Ubuntu');
os_release = chomp(os_release);
if (! ('26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 26.04', 'Ubuntu ' + os_release);
if ( ! get_kb_item('Host/Debian/dpkg-l') ) audit(AUDIT_PACKAGE_LIST_MISSING);

var cpu = get_kb_item('Host/cpu');
if (isnull(cpu)) audit(AUDIT_UNKNOWN_ARCH);
if ('x86_64' >!< cpu && cpu !~ "^i[3-6]86$" && 's390' >!< cpu && 'aarch64' >!< cpu) audit(AUDIT_LOCAL_CHECKS_NOT_IMPLEMENTED, 'Ubuntu', cpu);

var pkgs = [
    {'osver': '26.04', 'pkgname': 'heif-gdk-pixbuf', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'heif-thumbnailer', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'heif-view', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-dev', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-examples', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-aomdec', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-aomenc', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-dav1d', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-ffmpegdec', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-j2kdec', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-j2kenc', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-jpegdec', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-jpegenc', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-kvazaar', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-libde265', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-rav1e', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-svtenc', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugin-x265', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif-plugins-all', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']},
    {'osver': '26.04', 'pkgname': 'libheif1', 'pkgver': '1.21.2-3ubuntu0.3', 'cves': ['CVE-2026-47254', 'CVE-2026-47709', 'CVE-2026-47714', 'CVE-2026-48029', 'CVE-2026-50142']}
];

var flag = 0;
foreach var package_array ( pkgs ) {
  var osver = NULL;
  var pkgname = NULL;
  var pkgver = NULL;
  if (!empty_or_null(package_array['osver'])) osver = package_array['osver'];
  if (!empty_or_null(package_array['pkgname'])) pkgname = package_array['pkgname'];
  if (!empty_or_null(package_array['pkgver'])) pkgver = package_array['pkgver'];
  if (!empty_or_null(package_array['cves'])) cves = package_array['cves'];
  if (osver && pkgname && pkgver) {
    if (deb_check(release:osver, prefix:pkgname, reference:pkgver, cves:cves)) flag++;
  }
}

if (flag)
{
  var extra = '';
  extra += ubuntu_report_get();
  security_report_v4(
    port       : 0,
    severity   : SECURITY_WARNING,
    extra      : extra
  );
  exit(0);
}
else
{
  var tested = ubuntu_pkg_tests_get();
  if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
  else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'heif-gdk-pixbuf / heif-thumbnailer / heif-view / libheif-dev / etc');
}