FKIE_CVE-2025-13470

Vulnerability from fkie_nvd - Published: 2025-11-21 17:15 - Updated: 2026-10-08 10:10
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
In RNP version 0.18.0 a refactoring regression causes the symmetric session key used for Public-Key Encrypted Session Key (PKESK) packets to be left uninitialized except for zeroing, resulting in it always being an all-zero byte array. Any data encrypted using public-key encryption in this release can be decrypted trivially by supplying an all-zero session key, fully compromising confidentiality. The vulnerability affects only public key encryption (PKESK packets).  Passphrase-based encryption (SKESK packets) is not affected. Root cause: Vulnerable session key buffer used in PKESK packet generation. The defect was introduced in commit `7bd9a8dc356aae756b40755be76d36205b6b161a` where initialization logic inside `encrypted_build_skesk()` only randomized the key for the SKESK path and omitted it for the PKESK path.
References
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://access.redhat.com/security/cve/cve-2025-13402
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://aur.archlinux.org/packages/rnp
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://bugzilla.redhat.com/show_bug.cgi?id=2415863
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://github.com/rnpgp/rnp/commit/7bd9a8dc356aae756b40755be76d36205b6b161a
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://github.com/rnpgp/rnp/releases/tag/v0.18.1
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://launchpad.net/ubuntu/+source/rnp
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://open.ribose.com/advisories/ra-2025-11-20/
6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3https://packages.gentoo.org/packages/dev-util/librnp
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "RNP",
          "repo": "https://github.com/rnpgp/rnp",
          "vendor": "Ribose",
          "versions": [
            {
              "status": "affected",
              "version": "0.18.0"
            }
          ]
        }
      ],
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In RNP version 0.18.0 a refactoring regression causes the symmetric \nsession key used for Public-Key Encrypted Session Key (PKESK) packets to\n be left uninitialized except for zeroing, resulting in it always being \nan all-zero byte array.\n\nAny data encrypted using public-key encryption \nin this release can be decrypted trivially by supplying an all-zero \nsession key, fully compromising confidentiality.\n\nThe vulnerability affects only public key encryption (PKESK packets).\u00a0 Passphrase-based encryption (SKESK packets) is not affected.\n\nRoot cause: Vulnerable session key buffer used in PKESK packet generation.\n\n\n\nThe defect was introduced in commit `7bd9a8dc356aae756b40755be76d36205b6b161a` where initialization \nlogic inside `encrypted_build_skesk()` only randomized the key for the \nSKESK path and omitted it for the PKESK path."
    },
    {
      "lang": "es",
      "value": "En la versi\u00f3n 0.18.0 de RNP, una regresi\u00f3n de refactorizaci\u00f3n causa que la clave de sesi\u00f3n sim\u00e9trica utilizada para los paquetes de Clave de Sesi\u00f3n Cifrada con Clave P\u00fablica (PKESK) se deje sin inicializar, excepto por el borrado a cero, lo que resulta en que siempre sea un array de bytes todo a cero.\n\nCualquier dato cifrado utilizando cifrado de clave p\u00fablica en esta versi\u00f3n puede ser descifrado trivialmente al proporcionar una clave de sesi\u00f3n todo a cero, comprometiendo completamente la confidencialidad.\n\nLa vulnerabilidad afecta solo al cifrado de clave p\u00fablica (paquetes PKESK). El cifrado basado en frase de contrase\u00f1a (paquetes SKESK) no se ve afectado.\n\nCausa ra\u00edz: B\u00fafer de clave de sesi\u00f3n vulnerable utilizado en la generaci\u00f3n de paquetes PKESK.\n\nEl defecto fue introducido en el commit \u00277bd9a8dc356aae756b40755be76d36205b6b161a\u0027 donde la l\u00f3gica de inicializaci\u00f3n dentro de \u0027encrypted_build_skesk()\u0027 solo aleatoriz\u00f3 la clave para la ruta SKESK y la omiti\u00f3 para la ruta PKESK."
    }
  ],
  "id": "CVE-2025-13470",
  "lastModified": "2026-10-08T10:10:00.227",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
        "type": "Secondary"
      }
    ],
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "YES",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "RED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:H/U:Red",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "HIGH"
        },
        "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-13470",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-11-21T17:35:25.938705Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-11-21T17:15:50.473",
  "references": [
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://access.redhat.com/security/cve/cve-2025-13402"
    },
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://aur.archlinux.org/packages/rnp"
    },
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2415863"
    },
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://github.com/rnpgp/rnp/commit/7bd9a8dc356aae756b40755be76d36205b6b161a"
    },
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://github.com/rnpgp/rnp/releases/tag/v0.18.1"
    },
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://launchpad.net/ubuntu/+source/rnp"
    },
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://open.ribose.com/advisories/ra-2025-11-20/"
    },
    {
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "url": "https://packages.gentoo.org/packages/dev-util/librnp"
    }
  ],
  "sourceIdentifier": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-330"
        }
      ],
      "source": "6504adb2-f5e9-4c9b-9eda-5e19c93bd9b3",
      "type": "Secondary"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.