Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : QtSvg vulnerabilities (USN-8337-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8337-1. 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(318133);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/01");

  script_cve_id(
    "CVE-2018-19869",
    "CVE-2021-3481",
    "CVE-2021-28025",
    "CVE-2021-45930",
    "CVE-2023-32573"
  );
  script_xref(name:"USN", value:"8337-1");

  script_name(english:"Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS : QtSvg vulnerabilities (USN-8337-1)");

  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 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS host has packages installed that are affected by
multiple vulnerabilities as referenced in the USN-8337-1 advisory.

    It was discovered that QtSvg incorrectly handled certain SVG images. An attacker could possibly use this
    issue to cause QtSvg to crash, resulting in a denial of service. This issue only affected Ubuntu 16.04
    LTS. (CVE-2018-19869)

    It was discovered that QtSvg incorrectly handled certain SVG images. An attacker could use this issue to
    cause QtSvg to crash, resulting in a denial of service, or possibly execute arbitrary code. This issue
    only affected Ubuntu 16.04 LTS and Ubuntu 20.04 LTS. (CVE-2021-3481, CVE-2021-28025, CVE-2021-45930)

    It was discovered that QtSvg incorrectly handled certain SVG images. An attacker could use this issue to
    cause QtSvg to crash, resulting in a denial of service, or possibly execute arbitrary code.
    (CVE-2023-32573)

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-8337-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected libqt5svg5, libqt5svg5-dev and / or qtsvg5-examples packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/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-2021-45930");
  script_set_attribute(attribute:"cvss3_score_source", value:"CVE-2021-3481");

  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:"2018/12/04");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/05/28");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/01");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:16.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:18.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:22.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libqt5svg5");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:libqt5svg5-dev");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:qtsvg5-examples");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  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", "ubuntu_pro_sub_detect.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 (! ('16.04' >< os_release || '18.04' >< os_release || '20.04' >< os_release || '22.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 16.04 / 18.04 / 20.04 / 22.04', '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 ubuntu_pro_detected = get_kb_item('Host/Ubuntu/Pro/Services/esm-apps');
ubuntu_pro_detected = !empty_or_null(ubuntu_pro_detected);

var pro_caveat_needed = FALSE;

var pkgs = [
    {'osver': '16.04', 'pkgname': 'libqt5svg5', 'pkgver': '5.5.1-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2018-19869', 'CVE-2021-3481', 'CVE-2021-28025', 'CVE-2021-45930', 'CVE-2023-32573']},
    {'osver': '16.04', 'pkgname': 'libqt5svg5-dev', 'pkgver': '5.5.1-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2018-19869', 'CVE-2021-3481', 'CVE-2021-28025', 'CVE-2021-45930', 'CVE-2023-32573']},
    {'osver': '16.04', 'pkgname': 'qtsvg5-examples', 'pkgver': '5.5.1-2ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2018-19869', 'CVE-2021-3481', 'CVE-2021-28025', 'CVE-2021-45930', 'CVE-2023-32573']},
    {'osver': '18.04', 'pkgname': 'libqt5svg5', 'pkgver': '5.9.5-0ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-32573']},
    {'osver': '18.04', 'pkgname': 'libqt5svg5-dev', 'pkgver': '5.9.5-0ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-32573']},
    {'osver': '18.04', 'pkgname': 'qtsvg5-examples', 'pkgver': '5.9.5-0ubuntu1.1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-32573']},
    {'osver': '20.04', 'pkgname': 'libqt5svg5', 'pkgver': '5.12.8-0ubuntu1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-3481', 'CVE-2021-28025', 'CVE-2021-45930', 'CVE-2023-32573']},
    {'osver': '20.04', 'pkgname': 'libqt5svg5-dev', 'pkgver': '5.12.8-0ubuntu1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-3481', 'CVE-2021-28025', 'CVE-2021-45930', 'CVE-2023-32573']},
    {'osver': '20.04', 'pkgname': 'qtsvg5-examples', 'pkgver': '5.12.8-0ubuntu1+esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-3481', 'CVE-2021-28025', 'CVE-2021-45930', 'CVE-2023-32573']},
    {'osver': '22.04', 'pkgname': 'libqt5svg5', 'pkgver': '5.15.3-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-32573']},
    {'osver': '22.04', 'pkgname': 'libqt5svg5-dev', 'pkgver': '5.15.3-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-32573']},
    {'osver': '22.04', 'pkgname': 'qtsvg5-examples', 'pkgver': '5.15.3-1ubuntu0.1~esm1', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-32573']}
];

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

if (flag)
{
  var extra = '';
  if (pro_caveat_needed) {
    extra += 'NOTE: This vulnerability check contains fixes that apply to packages only \n';
    extra += 'available in Ubuntu ESM repositories. Access to these package security updates \n';
    extra += 'require an Ubuntu Pro subscription.\n\n';
  }
  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, 'libqt5svg5 / libqt5svg5-dev / qtsvg5-examples');
}