Medium severity · published Mar 3, 2021
CVE-2021-20225
A flaw was found in grub2 in versions prior to 2.06
6.7
CVSS
1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 63% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
7.0; 8.0 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
7.2; 7.3; 7.4; 7.6; 7.7; 8.2 · source: NVD
EL
Enterprise Linux Server Eus · Redhat
7.6; 7.7; 8.1 · source: NVD
EL
Enterprise Linux Server Tus · Redhat
7.4; 7.6; 7.7; 8.2 · source: NVD
EL
Enterprise Linux Workstation · Redhat
7.0 · source: NVD
FE
Fedora · Fedoraproject
33; 34 · source: NVD
GR
Grub2 · Gnu
before 2.06 · source: NVD
OS
Ontap Select Deploy Administration Utility · Netapp
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-20225
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-20225
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1924696
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6MWDWNOOWKPH3WXZBHT2R/
Third Party Advisory
https://security.gentoo.org/glsa/202104-05
Third Party Advisory
https://security.netapp.com/advisory/ntap-20220325-0001/
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