Out-of-bounds Write Affecting grub2 package, versions [,2.06)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.12% (47th percentile)

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  • Snyk IDSNYK-UNMANAGED-GRUB2-2368585
  • published26 Jan 2022
  • disclosed3 Mar 2021
  • creditUnknown

Introduced: 3 Mar 2021

CVE-2020-25647  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade grub2 to version 2.06 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

CVSS Scores

version 3.1