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CVE-2021-20225

Common vulnerabilities & exposures (CVE)

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Published at: - 03-03-2021 06:15
Last modified: - 18-04-2022 09:27
Total changes: - 6

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Low
Attack complexity
Local
Attack vector
High
Availability
High
Confidentiality
High
Integrity
High
Privileges required
Unchanged
Scope
None
User interaction
6.7
Base score
0.8
5.9
Exploitability score
Impact score
 

Verification logic

OR
OR
vendor=gnu AND product=grub2 AND versionEndExcluding=2.06
OR
vendor=Red Hat Enterprise Linux AND product=enterprise_linux AND version=7.0
vendor=Red Hat Enterprise Linux AND product=enterprise_linux AND version=8.0
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_aus AND version=7.2
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_aus AND version=7.3
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_aus AND version=7.4
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_aus AND version=7.6
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_aus AND version=7.7
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_aus AND version=8.2
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_eus AND version=7.6
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_eus AND version=7.7
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_eus AND version=8.1
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_tus AND version=7.4
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_tus AND version=7.6
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_tus AND version=7.7
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_server_tus AND version=8.2
vendor=Red Hat Enterprise Linux AND product=enterprise_linux_workstation AND version=7.0
OR
vendor=fedoraproject AND product=fedora AND version=33
vendor=fedoraproject AND product=fedora AND version=34
OR
vendor=netapp AND product=ontap_select_deploy_administration_utility AND version=-
 

Reference

 


Keywords

NVD

 

CVE-2021-20225

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures

 

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