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GSD-2020-15706

Vulnerability from gsd - Updated: 2023-12-13 01:21
Details
GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing, leading to arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and prior versions.
Aliases
Aliases

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    "id": "GSD-2020-15706",
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      "https://www.suse.com/security/cve/CVE-2020-15706.html",
      "https://www.debian.org/security/2020/dsa-4735",
      "https://access.redhat.com/errata/RHSA-2020:3276",
      "https://access.redhat.com/errata/RHSA-2020:3275",
      "https://access.redhat.com/errata/RHSA-2020:3274",
      "https://access.redhat.com/errata/RHSA-2020:3273",
      "https://access.redhat.com/errata/RHSA-2020:3271",
      "https://access.redhat.com/errata/RHSA-2020:3227",
      "https://access.redhat.com/errata/RHSA-2020:3223",
      "https://access.redhat.com/errata/RHSA-2020:3217",
      "https://access.redhat.com/errata/RHSA-2020:3216",
      "https://ubuntu.com/security/CVE-2020-15706",
      "https://advisories.mageia.org/CVE-2020-15706.html",
      "https://linux.oracle.com/cve/CVE-2020-15706.html"
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            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 6.4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "HIGH",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "exploitabilityScore": 0.5,
          "impactScore": 5.9
        }
      },
      "lastModifiedDate": "2022-11-16T03:58Z",
      "publishedDate": "2020-07-29T18:15Z"
    }
  }
}



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Taxonomy of the tags.


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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.

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Detection rules are retrieved from Rulezet.

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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.


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