Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : Pillow vulnerabilities (USN-8135-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8135-1. 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(304431);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/03/31");

  script_cve_id(
    "CVE-2021-25287",
    "CVE-2021-25288",
    "CVE-2021-25290",
    "CVE-2021-28675",
    "CVE-2021-28676",
    "CVE-2021-28677",
    "CVE-2023-44271",
    "CVE-2023-50447"
  );
  script_xref(name:"USN", value:"8135-1");

  script_name(english:"Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS : Pillow vulnerabilities (USN-8135-1)");

  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 14.04 LTS / 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple
vulnerabilities as referenced in the USN-8135-1 advisory.

    It was discovered that Pillow did not correctly handle reading J2K files, which could lead to an out-of-
    bounds read vulnerability. If a user or automated system were tricked into opening a specially crafted
    file, an attacker could possibly use this issue to cause a denial of service. This issue only affected
    Ubuntu 16.04 LTS. (CVE-2021-25287, CVE-2021-25288)

    It was discovered that Pillow did not correctly handle certain integer arithmetic, which could lead to a
    buffer overflow. An attacker could possibly use this issue to cause a denial of service or execute
    arbitrary code. This issue only affected Ubuntu 14.04 LTS. (CVE-2021-25290)

    It was discovered that Pillow did not correctly perform bounds checking for certain operations. An
    attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 14.04
    LTS and Ubuntu 16.04 LTS. (CVE-2021-28675, CVE-2021-28676, CVE-2021-28677)

    It was discovered that Pillow did not correctly handle certain memory operations. An attacker could
    possibly use this issue to cause a denial of service. (CVE-2023-44271)

    It was discovered that Pillow did not correctly sanitize certain inputs. An attacker could possibly use
    this issue to execute arbitrary code. (CVE-2023-50447)

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-8135-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
  script_set_attribute(attribute:"cvss4_vector", value:"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N");
  script_set_attribute(attribute:"cvss4_threat_vector", value:"CVSS:4.0/E:U");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2021-25288");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2023-50447");

  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:"2021/03/06");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/03/31");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/03/31");

  script_set_attribute(attribute:"plugin_type", value:"local");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:14.04:-:lts");
  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:"p-cpe:/a:canonical:ubuntu_linux:python-imaging");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-imaging-compat");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-imaging-sane");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-imaging-tk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-pil");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-pil.imagetk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python-sane");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-imaging");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-imaging-sane");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-imaging-tk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-pil");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-pil.imagetk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:python3-sane");
  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 (! ('14.04' >< os_release || '16.04' >< os_release || '18.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 14.04 / 16.04 / 18.04', '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': '14.04', 'pkgname': 'python-imaging', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python-imaging-compat', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python-imaging-sane', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python-imaging-tk', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python-pil', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python-pil.imagetk', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python-sane', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python3-imaging', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python3-imaging-sane', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python3-imaging-tk', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python3-pil', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python3-pil.imagetk', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '14.04', 'pkgname': 'python3-sane', 'pkgver': '2.3.0-1ubuntu3.4+esm5', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25290', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '16.04', 'pkgname': 'python-imaging', 'pkgver': '3.1.2-0ubuntu1.6+esm3', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25287', 'CVE-2021-25288', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '16.04', 'pkgname': 'python-pil', 'pkgver': '3.1.2-0ubuntu1.6+esm3', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25287', 'CVE-2021-25288', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '16.04', 'pkgname': 'python-pil.imagetk', 'pkgver': '3.1.2-0ubuntu1.6+esm3', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25287', 'CVE-2021-25288', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '16.04', 'pkgname': 'python3-pil', 'pkgver': '3.1.2-0ubuntu1.6+esm3', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25287', 'CVE-2021-25288', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '16.04', 'pkgname': 'python3-pil.imagetk', 'pkgver': '3.1.2-0ubuntu1.6+esm3', 'ubuntu_pro': TRUE, 'cves': ['CVE-2021-25287', 'CVE-2021-25288', 'CVE-2021-28675', 'CVE-2021-28676', 'CVE-2021-28677', 'CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '18.04', 'pkgname': 'python-pil', 'pkgver': '5.1.0-1ubuntu0.8+esm2', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '18.04', 'pkgname': 'python-pil.imagetk', 'pkgver': '5.1.0-1ubuntu0.8+esm2', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '18.04', 'pkgname': 'python3-pil', 'pkgver': '5.1.0-1ubuntu0.8+esm2', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-44271', 'CVE-2023-50447']},
    {'osver': '18.04', 'pkgname': 'python3-pil.imagetk', 'pkgver': '5.1.0-1ubuntu0.8+esm2', 'ubuntu_pro': TRUE, 'cves': ['CVE-2023-44271', 'CVE-2023-50447']}
];

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, 'python-imaging / python-imaging-compat / python-imaging-sane / etc');
}