CVE-2020-14308: gnu grub2 Integer Overflow or Wraparound

Vulnerability summary

CVE-2020-14308 is a medium (CVSS 6.4) Integer Overflow or Wraparound vulnerability in gnu grub2. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36% of scored vulnerabilities.

Timeline

1. 29-07-2020
   PublishedVulnerability first disclosed.
2. 04-08-2024
   Last modifiedVulnerability information updated.

Description

In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on the requested allocation size. This leads the function to return invalid memory allocations which can be further used to cause possible integrity, confidentiality and availability impacts during the boot process.

• CWE-190Integer Overflow or WraparoundThe product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.