Linux Distros Unpatched Vulnerability : CVE-2025-24528

#%NASL_MIN_LEVEL 80900
##
# (C) Tenable, Inc.
##

include('compat.inc');

if (description)
{
  script_id(230401);
  script_version("1.3");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id("CVE-2025-24528");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-24528");

  script_set_attribute(attribute:"synopsis", value:
"The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be
patched.");
  script_set_attribute(attribute:"description", value:
"The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied
patch available.

  - In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for
    a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write
    and kadmind daemon crash. (CVE-2025-24528)

Note that Nessus relies on the presence of the package as reported by the vendor.");
  script_set_attribute(attribute:"see_also", value:"https://ubuntu.com/security/CVE-2025-24528");
  script_set_attribute(attribute:"solution", value:
"There is no known solution at this time.");
  script_set_attribute(attribute:"agent", value:"unix");
  script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:S/C:N/I:N/A:P");
  script_set_cvss_temporal_vector("CVSS2#E:U/RL:U/RC:C");
  script_set_cvss3_base_vector("CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:H");
  script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:U/RC:C");
  script_set_attribute(attribute:"cvss_score_source", value:"CVE-2025-24528");

  script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
  script_set_attribute(attribute:"exploit_available", value:"false");
  script_set_attribute(attribute:"vendor_unpatched", value:"true");

  script_set_attribute(attribute:"vuln_publication_date", value:"2025/02/12");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/03/06");

  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:krb5");
  script_set_attribute(attribute:"generated_plugin", value:"current");
  script_end_attributes();

  script_category(ACT_GATHER_INFO);
  script_family(english:"Misc.");

  script_copyright(english:"This script is Copyright (C) 2025-2026 and is owned by Tenable, Inc. or an Affiliate thereof.");

  script_dependencies("set_linux_os_id.nasl", "ssh_get_info2.nasl");
  script_require_keys("Host/OS/identifier", "Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched");
  script_require_ports("Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04");

  exit(0);
}

if (!get_kb_item("global_settings/vendor_unpatched")) exit(0, "Unpatched Vulnerabilities Detection not active.");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (empty_or_null(get_one_kb_item("Host/Debian/dpkg-l"))) audit(AUDIT_PACKAGE_LIST_MISSING);

include('linux_unpatched.inc');

var distro_constraints_array = {
  "Ubuntu Linux-14.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "14.04",
        "pkgs": [
          {"reference": "krb5-admin-server"},
          {"reference": "krb5-doc"},
          {"reference": "krb5-gss-samples"},
          {"reference": "krb5-kdc"},
          {"reference": "krb5-kdc-ldap"},
          {"reference": "krb5-locales"},
          {"reference": "krb5-multidev"},
          {"reference": "krb5-otp"},
          {"reference": "krb5-pkinit"},
          {"reference": "krb5-user"},
          {"reference": "libgssapi-krb5-2"},
          {"reference": "libgssrpc4"},
          {"reference": "libk5crypto3"},
          {"reference": "libkadm5clnt-mit9"},
          {"reference": "libkadm5srv-mit8"},
          {"reference": "libkadm5srv-mit9"},
          {"reference": "libkdb5-7"},
          {"reference": "libkrad-dev"},
          {"reference": "libkrad0"},
          {"reference": "libkrb5-3"},
          {"reference": "libkrb5-dbg"},
          {"reference": "libkrb5-dev"},
          {"reference": "libkrb5support0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "krb5-admin-server"},
          {"reference": "krb5-doc"},
          {"reference": "krb5-gss-samples"},
          {"reference": "krb5-k5tls"},
          {"reference": "krb5-kdc"},
          {"reference": "krb5-kdc-ldap"},
          {"reference": "krb5-locales"},
          {"reference": "krb5-multidev"},
          {"reference": "krb5-otp"},
          {"reference": "krb5-pkinit"},
          {"reference": "krb5-user"},
          {"reference": "libgssapi-krb5-2"},
          {"reference": "libgssrpc4"},
          {"reference": "libk5crypto3"},
          {"reference": "libkadm5clnt-mit9"},
          {"reference": "libkadm5srv-mit9"},
          {"reference": "libkdb5-8"},
          {"reference": "libkrad-dev"},
          {"reference": "libkrad0"},
          {"reference": "libkrb5-3"},
          {"reference": "libkrb5-dbg"},
          {"reference": "libkrb5-dev"},
          {"reference": "libkrb5support0"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "krb5-admin-server"},
          {"reference": "krb5-doc"},
          {"reference": "krb5-gss-samples"},
          {"reference": "krb5-k5tls"},
          {"reference": "krb5-kdc"},
          {"reference": "krb5-kdc-ldap"},
          {"reference": "krb5-kpropd"},
          {"reference": "krb5-locales"},
          {"reference": "krb5-multidev"},
          {"reference": "krb5-otp"},
          {"reference": "krb5-pkinit"},
          {"reference": "krb5-user"},
          {"reference": "libgssapi-krb5-2"},
          {"reference": "libgssrpc4"},
          {"reference": "libk5crypto3"},
          {"reference": "libkadm5clnt-mit11"},
          {"reference": "libkadm5srv-mit11"},
          {"reference": "libkdb5-9"},
          {"reference": "libkrad-dev"},
          {"reference": "libkrad0"},
          {"reference": "libkrb5-3"},
          {"reference": "libkrb5-dbg"},
          {"reference": "libkrb5-dev"},
          {"reference": "libkrb5support0"}
        ]
      }
    ]
  }
};

var distro_constraints_values = linux_unpatched::get_distro_constraints(distro_constraints_arr:distro_constraints_array);
if (empty_or_null(distro_constraints_values)) audit(AUDIT_HOST_NOT, 'affected');
var report = linux_unpatched::check_unpatched_constraints(distro_constraints_values:distro_constraints_values);

if (!empty_or_null(report))
{
  security_report_v4(
      port       : 0,
      severity   : SECURITY_WARNING,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}