Integer Overflow or Wraparound Affecting grub2 package, versions [,2.06)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.05% (22nd percentile)

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  • Snyk IDSNYK-UNMANAGED-GRUB2-2368570
  • published26 Jan 2022
  • disclosed31 Jul 2020
  • creditUnknown

Introduced: 31 Jul 2020

CVE-2020-14310  (opens in a new tab)
CWE-190  (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 Integer Overflow or Wraparound. There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.

CVSS Scores

version 3.1