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CVE-2020-21047

Estado: ModificadaMedia (5.5)—

The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Elfutils Project — Elfutils

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2020-21047",
  "cveTags": [],
  "metrics": {
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        "ssvcData": {
          "id": "CVE-2020-21047",
          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "poc"
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            {
              "automatable": "no"
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            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-10-07T15:40:52.075327Z"
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    "cvssMetricV31": [
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          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "REQUIRED",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
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  "affected": [
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  "published": "2023-08-22T19:16:09.657",
  "references": [
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "source": "nvd@nist.gov",
      "description": [
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          "value": "CWE-787"
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  "descriptions": [
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      "lang": "en",
      "value": "The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks."
    },
    {
      "lang": "es",
      "value": "El componente libcpu que es utilizado por libasm de elfutils versión 0.177 (git 47780c9e), sufre de una vulnerabilidad de denegación de servicio causada por caídas de la aplicación debido a una escritura fuera de límites (CWE-787), por el error off-by-one (CWE-193) y por una aserción alcanzable (CWE-617). Para explotar la vulnerabilidad, los atacantes necesitan crear ciertos archivos ELF que eludan las comprobaciones de límites faltantes. "
    }
  ],
  "lastModified": "2026-06-17T03:03:30.900",
  "configurations": [
    {
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  "sourceIdentifier": "cve@mitre.org"
}