PT-2020-6586 · Grub2+10 · Grub2+10
Published
2020-09-16
·
Updated
2024-06-15
·
CVE-2020-25632
CVSS v3.1
8.2
High
| Vector | AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
grub2 versions prior to 2.06
Description
A flaw was found in the rmmod implementation of grub2, allowing the unloading of a module used as a dependency without checking if any other dependent module is still loaded, leading to a use-after-free scenario. This could allow arbitrary code to be executed or a bypass of Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Recommendations
For versions prior to 2.06, update to version 2.06 or later to resolve the issue. As a temporary workaround, consider restricting the use of the rmmod command to minimize the risk of exploitation.
Exploit
Fix
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Linuxmint
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu
Grub2