CVE-2020-15706 (GCVE-0-2020-15706)

Vulnerability from cvelistv5 – Published: 2020-07-29 17:45 – Updated: 2024-09-16 22:20
VLAI
Title
GRUB2 contains a race condition leading to a use-after-free vulnerability which can be triggered by redefining a function whilst the same function is already executing.
Summary
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.
Severity
6.4 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Assigner
References
Impacted products
Vendor Product Version
Ubuntu grub2 in Ubuntu Affected: 20.04 LTS , < 2.04-1ubuntu26.1 (custom)
Affected: 18.04 LTS , < 2.02-2ubuntu8.16 (custom)
Affected: 16.04 LTS , < 2.02~beta2-36ubuntu3.26 (custom)
Affected: 14.04 ESM , < 2.02~beta2-9ubuntu1.20 (custom)
Create a notification for this product.
Date Public
2020-07-29 00:00
Credits
Chris Coulson
Show details on NVD website
To clipboard 

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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.