PT-2021-5817 · Grub2+10 · Grub2+10
Marco Benatto
·
Published
2021-02-03
·
Updated
2026-02-26
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CVE-2021-20225
CVSS v2.0
7.2
High
| Vector | AV:L/AC:L/Au:N/C:C/I:C/A:C |
Name of the Vulnerable Software and Affected Versions
grub2 versions prior to 2.06
Description
A flaw was found in the option parser of grub2, allowing 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. This poses a threat to data confidentiality and integrity, as well as system availability. The vulnerability can be exploited to gain access to confidential data, compromise data integrity, and cause a denial of service.
Recommendations
For versions prior to 2.06, update to version 2.06 or later to resolve the issue. As a temporary workaround, consider restricting the use of certain commands with short forms of options to minimize the risk of exploitation.
Fix
Memory Corruption
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu
Grub2