{
  "id": "CVE-2025-29913",
  "sourceIdentifier": "security-advisories@github.com",
  "published": "2025-03-17T23:15:18.590",
  "lastModified": "2025-03-17T23:15:18.590",
  "vulnStatus": "Awaiting Analysis",
  "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. A critical heap buffer overflow vulnerability was identified in the `Crypto_TC_Prep_AAD` function of CryptoLib versions 1.3.3 and prior. This vulnerability allows an attacker to trigger a Denial of Service (DoS) or potentially execute arbitrary code (RCE) by providing a maliciously crafted telecommand (TC) frame that causes an unsigned integer underflow. The vulnerability lies in the function `Crypto_TC_Prep_AAD`, specifically during the computation of `tc_mac_start_index`. The affected code incorrectly calculates the MAC start index without ensuring it remains within the bounds of the `ingest` buffer. When `tc_mac_start_index` underflows due to an incorrect length calculation, the function attempts to access an out-of-bounds memory location, leading to a segmentation fault. The vulnerability is still present in the repository as of commit `d3cc420ace96d02a5b7e83d88cbd2e48010d5723`."
    },
    {
      "lang": "es",
      "value": "CryptoLib ofrece una soluci\u00f3n exclusivamente de software que utiliza el Protocolo de Seguridad de Enlace de Datos Espaciales CCSDS - Procedimientos Extendidos (SDLS-EP) para proteger las comunicaciones entre una nave espacial que ejecuta el Sistema de Vuelo (cFS) y una estaci\u00f3n terrestre. Se identific\u00f3 una vulnerabilidad cr\u00edtica de desbordamiento del b\u00fafer de pila en la funci\u00f3n `Crypto_TC_Prep_AAD` de las versiones 1.3.3 y anteriores de CryptoLib. Esta vulnerabilidad permite a un atacante desencadenar una denegaci\u00f3n de servicio (DoS) o potencialmente ejecutar c\u00f3digo arbitrario (RCE) al proporcionar una trama de telecomando (TC) maliciosa que causa un desbordamiento por debajo de un entero sin signo. La vulnerabilidad reside en la funci\u00f3n `Crypto_TC_Prep_AAD`, espec\u00edficamente durante el c\u00e1lculo de `tc_mac_start_index`. El c\u00f3digo afectado calcula incorrectamente el \u00edndice de inicio MAC sin garantizar que permanezca dentro de los l\u00edmites del b\u00fafer de ingesta. Cuando `tc_mac_start_index` presenta un desbordamiento por debajo de lo permitido debido a un c\u00e1lculo de longitud incorrecto, la funci\u00f3n intenta acceder a una ubicaci\u00f3n de memoria fuera de los l\u00edmites, lo que provoca un fallo de segmentaci\u00f3n. La vulnerabilidad persiste en el repositorio a partir del commit `d3cc420ace96d02a5b7e83d88cbd2e48010d5723`."
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "security-advisories@github.com",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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:X/R:X/V:X/RE:X/U:X",
          "baseScore": 8.9,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "NONE",
          "exploitMaturity": "PROOF_OF_CONCEPT",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "security-advisories@github.com",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        },
        {
          "lang": "en",
          "value": "CWE-191"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/nasa/CryptoLib/security/advisories/GHSA-q4v2-fvrv-qrf6",
      "source": "security-advisories@github.com"
    }
  ]
}