CVE-2021-3696 (GCVE-0-2021-3696)

Vulnerability from cvelistv5 – Published: 2022-07-06 15:06 – Updated: 2024-08-03 17:01
VLAI?
Summary
A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be considered Low as it's very complex to an attacker control the encoding and positioning of corrupted Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
Severity ?
No CVSS data available.
CWE
Assigner
References
Impacted products
Vendor Product Version
n/a grub2 Affected: grub-2.06
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El impacto en la confidencialidad, integridad y disponibilidad puede considerarse bajo ya que es muy complejo que un atacante controle la codificaci\u00f3n y el posicionamiento de las entradas Huffman corruptas para conseguir resultados como la ejecuci\u00f3n de c\u00f3digo arbitrario y/o la omisi\u00f3n del arranque seguro. Este fallo afecta a grub2 versiones anteriores a 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  }
}


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Tags
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.