fedoraproject fedora CVE-2020-14372 vulnerability in Fedora Project and Other Products
Published on March 3, 2021

product logo product logo product logo product logo product logo
A flaw was found in grub2 in versions prior to 2.06, where it incorrectly enables the usage of the ACPI command when Secure Boot is enabled. This flaw allows an attacker with privileged access to craft a Secondary System Description Table (SSDT) containing code to overwrite the Linux kernel lockdown variable content directly into memory. The table is further loaded and executed by the kernel, defeating its Secure Boot lockdown and allowing the attacker to load unsigned code. The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.

Vendor Advisory Vendor Advisory NVD

Weakness Type

What is a Denylist / Deny List Vulnerability?

The product implements a protection mechanism that relies on a list of inputs (or properties of inputs) that are not allowed by policy or otherwise require other action to neutralize before additional processing takes place, but the list is incomplete, leading to resultant weaknesses. Developers often try to protect their products against malicious input by performing tests against inputs that are known to be bad, such as special characters that can invoke new commands. However, such lists often only account for the most well-known bad inputs. Attackers may be able to find other malicious inputs that were not expected by the developer, allowing them to bypass the intended protection mechanism.

CVE-2020-14372 has been classified to as a Denylist / Deny List vulnerability or weakness.


Products Associated with CVE-2020-14372

You can be notified by email with stack.watch whenever vulnerabilities like CVE-2020-14372 are published in these products:

Fedora Project Fedora
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Enterprise Linux Server Aus
 
Red Hat Enterprise Linux Server Eus
 
Red Hat Enterprise Linux Server Tus
 
Red Hat Enterprise Linux Workstation
 
GNU Grub2
 
Canonical Ubuntu Linux
 
NetApp Cloud Backup
 
NetApp Ontap Select Deploy Administration Utility
 

Exploit Probability

EPSS
1.45%
Percentile
80.49%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.