Vulnerability 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 Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Grub2 | < 2.06 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux Server Aus | 7.2 |
| Redhat | Enterprise Linux Server Eus | 7.6 |
| Redhat | Enterprise Linux Server Tus | 7.4 |
| Redhat | Enterprise Linux Workstation | 7.0 |
| Fedoraproject | Fedora | 33 |
| Netapp | Ontap Select Deploy Administration Utility | - |
Related Weaknesses (CWE)
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1924696Issue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202104-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220325-0001/Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1924696Issue TrackingThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://security.gentoo.org/glsa/202104-05Third Party Advisory
- https://security.netapp.com/advisory/ntap-20220325-0001/Third Party Advisory
FAQ
What is CVE-2021-20225?
CVE-2021-20225 is a vulnerability with a CVSS score of 6.7 (MEDIUM). 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 s...
How severe is CVE-2021-20225?
CVE-2021-20225 has been rated MEDIUM with a CVSS base score of 6.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-20225?
Check the references section above for vendor advisories and patch information. Affected products include: Gnu Grub2, Redhat Enterprise Linux, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Server Tus.