{
  "affected": [
    {
      "affectedData": [
        {
          "product": "CryptoLib",
          "vendor": "nasa",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.4.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:nasa:cryptolib:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AE1BE91E-2901-42AF-BC66-762CFA7A2582",
              "versionEndExcluding": "1.4.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "CryptoLib provides a software-only solution using the CCSDS Space Data Link Security Protocol - Extended Procedures (SDLS-EP) to secure communications between a spacecraft running the core Flight System (cFS) and a ground station. Prior to version 1.4.3, the Crypto_Config_Add_Gvcid_Managed_Parameters function only checks whether gvcid_counter \u003e GVCID_MAN_PARAM_SIZE. As a result, it allows up to the 251st entry, which causes a write past the end of the array, overwriting gvcid_counter located immediately after gvcid_managed_parameters_array[250]. This leads to an out-of-bounds write, and the overwritten gvcid_counter may become an arbitrary value, potentially affecting the parameter lookup/registration logic that relies on it. This issue has been patched in version 1.4.3."
    },
    {
      "lang": "es",
      "value": "CryptoLib proporciona una soluci\u00f3n \u00fanicamente de software utilizando el Protocolo de Seguridad de Enlace de Datos Espaciales CCSDS - Procedimientos Extendidos (SDLS-EP) para asegurar las comunicaciones entre una nave espacial ejecutando el Sistema de Vuelo central (cFS) y una estaci\u00f3n terrestre. Antes de la versi\u00f3n 1.4.3, la funci\u00f3n Crypto_Config_Add_Gvcid_Managed_Parameters solo verifica si gvcid_counter \u0026gt; GVCID_MAN_PARAM_SIZE. Como resultado, permite hasta la entrada 251, lo que provoca una escritura m\u00e1s all\u00e1 del final del array, sobrescribiendo gvcid_counter ubicado inmediatamente despu\u00e9s de gvcid_managed_parameters_array[250]. Esto conduce a una escritura fuera de l\u00edmites, y el gvcid_counter sobrescrito puede convertirse en un valor arbitrario, afectando potencialmente la l\u00f3gica de b\u00fasqueda/registro de par\u00e1metros que depende de \u00e9l. Este problema ha sido parcheado en la versi\u00f3n 1.4.3."
    }
  ],
  "id": "CVE-2026-21897",
  "lastModified": "2026-06-17T10:19:06.680",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "LOW",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-21897",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-01-12T20:21:14.781089Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-01-10T01:16:17.053",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/nasa/CryptoLib/releases/tag/v1.4.3"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://github.com/nasa/CryptoLib/security/advisories/GHSA-9x7j-gx23-7m5r"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}