Linux Distros Unpatched Vulnerability : CVE-2025-62291

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

include('compat.inc');

if (description)
{
  script_id(271825);
  script_version("1.4");
  script_set_attribute(attribute:"plugin_modification_date", value:"2026/01/21");

  script_cve_id("CVE-2025-62291");

  script_name(english:"Linux Distros Unpatched Vulnerability : CVE-2025-62291");

  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 the eap-mschapv2 plugin (client-side) in strongSwan before 6.0.3, a malicious EAP-MSCHAPv2 server can
    send a crafted message of size 6 through 8, and cause an integer underflow that potentially results in a
    heap-based buffer overflow. (CVE-2025-62291)

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-2025-62291");
  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:N/C:P/I:P/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:N/UI:N/S:U/C:H/I:H/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-2025-62291");

  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:"2025/10/27");
  script_set_attribute(attribute:"plugin_publication_date", value:"2025/10/28");

  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:"cpe:/o:canonical:ubuntu_linux:20.04:-:lts");
  script_set_attribute(attribute:"cpe", value:"p-cpe:/a:canonical:ubuntu_linux:strongswan");
  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("ssh_get_info2.nasl", "set_linux_os_id.nasl");
  script_require_keys("Host/cpu", "Host/local_checks_enabled", "global_settings/vendor_unpatched", "Host/OS/identifier");
  script_require_ports("Host/OS/Ubuntu Linux-14.04", "Host/OS/Ubuntu Linux-16.04", "Host/OS/Ubuntu Linux-18.04", "Host/OS/Ubuntu Linux-20.04");

  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": "libstrongswan"},
          {"reference": "strongswan"},
          {"reference": "strongswan-dbg"},
          {"reference": "strongswan-ike"},
          {"reference": "strongswan-nm"},
          {"reference": "strongswan-plugin-af-alg"},
          {"reference": "strongswan-plugin-agent"},
          {"reference": "strongswan-plugin-attr-sql"},
          {"reference": "strongswan-plugin-certexpire"},
          {"reference": "strongswan-plugin-coupling"},
          {"reference": "strongswan-plugin-curl"},
          {"reference": "strongswan-plugin-dhcp"},
          {"reference": "strongswan-plugin-dnscert"},
          {"reference": "strongswan-plugin-dnskey"},
          {"reference": "strongswan-plugin-duplicheck"},
          {"reference": "strongswan-plugin-eap-aka"},
          {"reference": "strongswan-plugin-eap-aka-3gpp2"},
          {"reference": "strongswan-plugin-eap-dynamic"},
          {"reference": "strongswan-plugin-eap-gtc"},
          {"reference": "strongswan-plugin-eap-md5"},
          {"reference": "strongswan-plugin-eap-mschapv2"},
          {"reference": "strongswan-plugin-eap-peap"},
          {"reference": "strongswan-plugin-eap-radius"},
          {"reference": "strongswan-plugin-eap-sim"},
          {"reference": "strongswan-plugin-eap-sim-file"},
          {"reference": "strongswan-plugin-eap-sim-pcsc"},
          {"reference": "strongswan-plugin-eap-simaka-pseudonym"},
          {"reference": "strongswan-plugin-eap-simaka-reauth"},
          {"reference": "strongswan-plugin-eap-simaka-sql"},
          {"reference": "strongswan-plugin-eap-tls"},
          {"reference": "strongswan-plugin-eap-tnc"},
          {"reference": "strongswan-plugin-eap-ttls"},
          {"reference": "strongswan-plugin-error-notify"},
          {"reference": "strongswan-plugin-farp"},
          {"reference": "strongswan-plugin-fips-prf"},
          {"reference": "strongswan-starter"}
        ]
      }
    ]
  },
  "Ubuntu Linux-16.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "16.04",
        "pkgs": [
          {"reference": "charon-cmd"},
          {"reference": "libcharon-extra-plugins"},
          {"reference": "libstrongswan"},
          {"reference": "libstrongswan-extra-plugins"},
          {"reference": "libstrongswan-standard-plugins"},
          {"reference": "strongswan"},
          {"reference": "strongswan-charon"},
          {"reference": "strongswan-dbg"},
          {"reference": "strongswan-ike"},
          {"reference": "strongswan-ikev1"},
          {"reference": "strongswan-ikev2"},
          {"reference": "strongswan-libcharon"},
          {"reference": "strongswan-nm"},
          {"reference": "strongswan-plugin-af-alg"},
          {"reference": "strongswan-plugin-agent"},
          {"reference": "strongswan-plugin-attr-sql"},
          {"reference": "strongswan-plugin-coupling"},
          {"reference": "strongswan-plugin-curl"},
          {"reference": "strongswan-plugin-dnscert"},
          {"reference": "strongswan-plugin-dnskey"},
          {"reference": "strongswan-plugin-fips-prf"},
          {"reference": "strongswan-plugin-gcrypt"},
          {"reference": "strongswan-plugin-gmp"},
          {"reference": "strongswan-plugin-ipseckey"},
          {"reference": "strongswan-plugin-ldap"},
          {"reference": "strongswan-plugin-load-tester"},
          {"reference": "strongswan-plugin-mysql"},
          {"reference": "strongswan-plugin-ntru"},
          {"reference": "strongswan-plugin-openssl"},
          {"reference": "strongswan-plugin-pgp"},
          {"reference": "strongswan-plugin-pkcs11"},
          {"reference": "strongswan-plugin-pubkey"},
          {"reference": "strongswan-plugin-radattr"},
          {"reference": "strongswan-plugin-sql"},
          {"reference": "strongswan-plugin-sqlite"},
          {"reference": "strongswan-plugin-sshkey"},
          {"reference": "strongswan-starter"},
          {"reference": "strongswan-tnc-base"},
          {"reference": "strongswan-tnc-client"},
          {"reference": "strongswan-tnc-ifmap"},
          {"reference": "strongswan-tnc-pdp"},
          {"reference": "strongswan-tnc-server"}
        ]
      }
    ]
  },
  "Ubuntu Linux-18.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "18.04",
        "pkgs": [
          {"reference": "charon-cmd"},
          {"reference": "charon-systemd"},
          {"reference": "libcharon-extra-plugins"},
          {"reference": "libcharon-standard-plugins"},
          {"reference": "libstrongswan"},
          {"reference": "libstrongswan-extra-plugins"},
          {"reference": "libstrongswan-standard-plugins"},
          {"reference": "strongswan"},
          {"reference": "strongswan-charon"},
          {"reference": "strongswan-libcharon"},
          {"reference": "strongswan-nm"},
          {"reference": "strongswan-pki"},
          {"reference": "strongswan-scepclient"},
          {"reference": "strongswan-starter"},
          {"reference": "strongswan-swanctl"},
          {"reference": "strongswan-tnc-base"},
          {"reference": "strongswan-tnc-client"},
          {"reference": "strongswan-tnc-ifmap"},
          {"reference": "strongswan-tnc-pdp"},
          {"reference": "strongswan-tnc-server"}
        ]
      }
    ]
  },
  "Ubuntu Linux-20.04": {
    "package_manager": "dpkg-l",
    "constraints": [
      {
        "release": "20.04",
        "pkgs": [
          {"reference": "charon-cmd"},
          {"reference": "charon-systemd"},
          {"reference": "libcharon-extauth-plugins"},
          {"reference": "libcharon-extra-plugins"},
          {"reference": "libcharon-standard-plugins"},
          {"reference": "libstrongswan"},
          {"reference": "libstrongswan-extra-plugins"},
          {"reference": "libstrongswan-standard-plugins"},
          {"reference": "strongswan"},
          {"reference": "strongswan-charon"},
          {"reference": "strongswan-libcharon"},
          {"reference": "strongswan-nm"},
          {"reference": "strongswan-pki"},
          {"reference": "strongswan-scepclient"},
          {"reference": "strongswan-starter"},
          {"reference": "strongswan-swanctl"},
          {"reference": "strongswan-tnc-base"},
          {"reference": "strongswan-tnc-client"},
          {"reference": "strongswan-tnc-ifmap"},
          {"reference": "strongswan-tnc-pdp"},
          {"reference": "strongswan-tnc-server"}
        ]
      }
    ]
  }
};

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_HOLE,
      extra      : report
  );
  exit(0);
}
else
{
  audit(AUDIT_HOST_NOT, 'affected');
}