8.2

CVE-2021-20233

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.

Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Gnu ≫ Grub2 Version < 2.06
Redhat ≫ Enterprise Linux Version7.0
Redhat ≫ Enterprise Linux Version8.0
Fedoraproject ≫ Fedora Version33
Fedoraproject ≫ Fedora Version34
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.14% 0.34
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 8.2 1.5 6
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
nvd@nist.gov 7.2 3.9 10
AV:L/AC:L/Au:N/C:C/I:C/A:C
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://bugzilla.redhat.com/show_bug.cgi?id=1926263
Patch
Third Party Advisory
Issue Tracking