Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : containerd vulnerabilities (USN-8472-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8472-1. 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(322949);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/06/26");

  script_cve_id(
    "CVE-2026-33814",
    "CVE-2026-47262",
    "CVE-2026-50195",
    "CVE-2026-53488",
    "CVE-2026-53489",
    "CVE-2026-53492"
  );
  script_xref(name:"IAVA", value:"2026-A-0621");
  script_xref(name:"USN", value:"8472-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : containerd vulnerabilities (USN-8472-1)");

  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 20.04 LTS / 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has a package installed that is affected by
multiple vulnerabilities as referenced in the USN-8472-1 advisory.

    It was discovered that containerd incorrectly handled HTTP/2 SETTINGS frames. A remote attacker could
    possibly use this issue to cause containerd to enter an infinite loop, resulting in a denial of service.
    (CVE-2026-33814)

    Jakub Ciolek and Kyle Elliott discovered that containerd incorrectly handled group parsing when creating
    containers from images. An attacker could possibly use this issue to cause containerd to consume excessive
    memory, resulting in a denial of service. (CVE-2026-47262)

    Henry Beberman and Robert Prast discovered that containerd incorrectly validated image references when
    importing container checkpoints. An attacker could possibly use this issue to poison the local image cache
    and execute arbitrary code in other pods. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS,
    Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-50195)

    Robert Prast discovered that containerd incorrectly propagated labels from image configurations to
    containers. An attacker could possibly use this issue to execute arbitrary code on the host.
    (CVE-2026-53488)

    Yuming Zhang, Song Li, Sangwon Ryu, Henry Beberman, Robert Prast, Kyle Elliott and Zhenchen Wang
    discovered that containerd incorrectly validated symlinked paths when restoring container checkpoints. An
    attacker could possibly use this issue to read arbitrary files on the host, resulting in information
    disclosure. This issue only affected Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10 and Ubuntu 26.04
    LTS. (CVE-2026-53489)

    Robert Prast discovered that containerd incorrectly trusted device interface annotations when restoring
    container checkpoints. An attacker could possibly use this issue to bypass resource allocation
    restrictions and inject devices or host mounts into a container. This issue only affected Ubuntu 22.04
    LTS, Ubuntu 24.04 LTS, Ubuntu 25.10 and Ubuntu 26.04 LTS. (CVE-2026-53492)

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-8472-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected containerd package.");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/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:N/AC:L/PR:N/UI:N/S:U/C:N/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:L/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-2026-33814");
  script_set_attribute(attribute:"cvss4_score_source", value:"CVE-2026-53488");

  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:"2026/05/07");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/06/25");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/06/26");

  script_set_attribute(attribute:"plugin_type", value:"local");
  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:"cpe:/o:canonical:ubuntu_linux:24.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:25.10");
  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:containerd");
  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", "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 (! ('20.04' >< os_release || '22.04' >< os_release || '24.04' >< os_release || '25.10' >< os_release || '26.04' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.04 / 25.10 / 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 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': '20.04', 'pkgname': 'containerd', 'pkgver': '1.7.24-0ubuntu1~20.04.2+esm2', 'ubuntu_pro': TRUE, 'cves': ['CVE-2026-33814', 'CVE-2026-47262', 'CVE-2026-53488']},
    {'osver': '22.04', 'pkgname': 'containerd', 'pkgver': '2.2.1-0ubuntu1~22.04.2', 'ubuntu_pro': FALSE, 'cves': ['CVE-2026-33814', 'CVE-2026-47262', 'CVE-2026-50195', 'CVE-2026-53488', 'CVE-2026-53489', 'CVE-2026-53492']},
    {'osver': '24.04', 'pkgname': 'containerd', 'pkgver': '2.2.1-0ubuntu1~24.04.3', 'ubuntu_pro': FALSE, 'cves': ['CVE-2026-33814', 'CVE-2026-47262', 'CVE-2026-50195', 'CVE-2026-53488', 'CVE-2026-53489', 'CVE-2026-53492']},
    {'osver': '25.10', 'pkgname': 'containerd', 'pkgver': '2.2.1-0ubuntu1~25.10.2', 'ubuntu_pro': FALSE, 'cves': ['CVE-2026-33814', 'CVE-2026-47262', 'CVE-2026-50195', 'CVE-2026-53488', 'CVE-2026-53489', 'CVE-2026-53492']},
    {'osver': '26.04', 'pkgname': 'containerd', 'pkgver': '2.2.2-0ubuntu1.1', 'ubuntu_pro': FALSE, 'cves': ['CVE-2026-33814', 'CVE-2026-47262', 'CVE-2026-50195', 'CVE-2026-53488', 'CVE-2026-53489', 'CVE-2026-53492']}
];

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_HOLE,
    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, 'containerd');
}