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CVE-2020-27171 (GCVE-0-2020-27171)

Vulnerability from cvelistv5 – Published: 2021-03-20 21:41 – Updated: 2024-08-04 16:11
VLAI
Summary
An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.
Severity
6.0 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

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              "value": "CWE-193"
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          },
          {
            "lang": "es",
            "value": "Se detect\u00f3 un problema en el kernel de Linux versiones anteriores a 5.11.8.\u0026#xa0;El archivo kernel/bpf/verifier.c presenta un error por un paso (con un subdesbordamiento de enteros resultante) afectando la especulaci\u00f3n fuera de l\u00edmites en la aritm\u00e9tica de punteros, conllevando a ataques de canal lateral que anulan las mitigaciones de Spectre y consiguen informaci\u00f3n confidencial de la memoria del kernel , tambi\u00e9n se conoce como CID-10d2bb2e6b1d"
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              "exploitabilityScore": 3.9,
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        "published": "2021-03-20T22:15:12.000",
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    "redhat_vex": {
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      "current_release_date": "2026-06-28T11:57:38+00:00",
      "cve": "CVE-2020-27171",
      "id": "CVE-2020-27171",
      "initial_release_date": "2020-01-01T00:00:00+00:00",
      "product_status:known_affected": "76",
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      "source": "Red Hat CSAF VEX",
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      "cve": "CVE-2020-27171",
      "id": "CVE-2020-27171",
      "initial_release_date": "2023-02-15T03:52:48Z",
      "product_status:known_affected": "300",
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      "product_status:recommended": "1340",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2020-27171",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2020-27171.json",
      "version": "44"
    }
  }
}



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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.