A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Metrics
Affected Vendors & Products
Advisories
| Source | ID | Title |
|---|---|---|
Debian DSA |
DSA-4867-1 | grub2 security update |
EUVD |
EUVD-2021-7672 | A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu rendering code performs a length calculation on the assumption that expressing a quoted single quote will require 3 characters, while it actually requires 4 characters which allows an attacker to corrupt memory by one byte for each quote in the input. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability. |
Ubuntu USN |
USN-4992-1 | GRUB 2 vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
No history.
Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2024-08-03T17:37:22.631Z
Reserved: 2020-12-17T00:00:00
Link: CVE-2021-20233
No data.
Status : Modified
Published: 2021-03-03T17:15:12.037
Modified: 2024-11-21T05:46:10.990
Link: CVE-2021-20233
OpenCVE Enrichment
No data.
Debian DSA
EUVD
Ubuntu USN