Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS : OpenJDK 21 vulnerabilities (USN-8796-1)

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Ubuntu Security Notice USN-8796-1. 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(349110);
  script_version("1.1");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/09/22");
  script_xref(name:"USN", value:"8796-1");

  script_name(english:"Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS : OpenJDK 21 vulnerabilities (USN-8796-1)");

  script_set_attribute(attribute:"synopsis", value:
"The remote Ubuntu host is missing a security update.");
  script_set_attribute(attribute:"description", value:
"The remote Ubuntu 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS / Pro Realtime 22.04 LTS / Pro Realtime 24.04 LTS host
has packages installed that are affected by a vulnerability as referenced in the USN-8796-1 advisory.

    Kai Aizen discovered that the Networking component of OpenJDK 21 did not correctly handle user
    authentication. A remote attacker could possibly use this issue to leak sensitive information.
    (CVE-2026-61308)

    It was discovered that the JSSE component of OpenJDK 21 did not correctly handle user authentication. A
    remote attacker could possibly use this issue to cause a denial of service. (CVE-2026-70907)

    It was discovered that the Security component of OpenJDK 21 did not correctly handle user authentication.
    A remote attacker could possibly use this issue to leak sensitive information. (CVE-2026-60589)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue 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-8796-1");
  script_set_attribute(attribute:"solution", value:
"Update the affected packages.");
  script_set_attribute(attribute:"risk_factor", value:"Medium");

  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:"2026/09/21");
  script_set_attribute(attribute:"patch_publication_date", value:"2026/09/21");
  script_set_attribute(attribute:"plugin_publication_date", value:"2026/09/22");

  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:26.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"cpe:/o:canonical:ubuntu_linux:Pro:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-demo");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-jdk");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-jdk-headless");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-jre");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-jre-headless");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-jre-zero");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-source");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:openjdk-21-testsupport");
  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");
  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 || '26.04' >< os_release || 'Pro' >< os_release)) audit(AUDIT_OS_NOT, 'Ubuntu 20.04 / 22.04 / 24.04 / 26.04 / Pro', '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': '20.04', 'pkgname': 'openjdk-21-demo', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '20.04', 'pkgname': 'openjdk-21-jdk', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '20.04', 'pkgname': 'openjdk-21-jdk-headless', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '20.04', 'pkgname': 'openjdk-21-jre', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '20.04', 'pkgname': 'openjdk-21-jre-headless', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '20.04', 'pkgname': 'openjdk-21-jre-zero', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '20.04', 'pkgname': 'openjdk-21-source', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '20.04', 'pkgname': 'openjdk-21-testsupport', 'pkgver': '21.0.12.1+1-1~20.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-demo', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-jdk', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-jdk-headless', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-jre', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-jre-headless', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-jre-zero', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-source', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '22.04', 'pkgname': 'openjdk-21-testsupport', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-demo', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-jdk', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-jdk-headless', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-jre', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-jre-headless', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-jre-zero', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-source', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '24.04', 'pkgname': 'openjdk-21-testsupport', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-demo', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-jdk', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-jdk-headless', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-jre', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-jre-headless', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-jre-zero', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-source', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': '26.04', 'pkgname': 'openjdk-21-testsupport', 'pkgver': '21.0.12.1+1-1~26.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-demo', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jdk', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jdk-headless', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jre', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jre-headless', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jre-zero', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-source', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-testsupport', 'pkgver': '21.0.12.1+1-1~22.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-demo', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jdk', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jdk-headless', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jre', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jre-headless', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-jre-zero', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-source', 'pkgver': '21.0.12.1+1-1~24.04.4'},
    {'osver': 'Pro', 'pkgname': 'openjdk-21-testsupport', 'pkgver': '21.0.12.1+1-1~24.04.4'}
];

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, 'openjdk-21-demo / openjdk-21-jdk / openjdk-21-jdk-headless / etc');
}