CVE-2021-20225

medium

Description

A flaw was found in grub2 in versions prior to 2.06. The option parser allows an attacker to write past the end of a heap-allocated buffer by calling certain commands with a large number of specific short forms of options. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

References

https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective

https://security.netapp.com/advisory/ntap-20220325-0001/

https://security.gentoo.org/glsa/202104-05

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/

https://bugzilla.redhat.com/show_bug.cgi?id=1924696

Details

Source: Mitre, NVD

Published: 2021-03-03

Updated: 2023-11-07

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 6.7

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Severity: Medium