CVE-2020-27779
High
Description
A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Gnu Grub2
PublishedMar 3, 2021
First seenMar 3, 2021
Weakness typeCWE-285CWE-285
How to fix
Update
- gnu grub22.06 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| gnu grub2 | v < 2.06 | 2.06 |
| redhat enterprise_linux | 7.0, 8.0 | — |
| redhat enterprise_linux_server_aus | 7.2, 7.3, 7.4, 7.6, 7.7, 8.2 | — |
| redhat enterprise_linux_server_eus | 7.6, 7.7, 8.1 | — |
| redhat enterprise_linux_server_tus | 7.4, 7.6, 7.7, 8.2 | — |
| redhat enterprise_linux_workstation | 7.0 | — |
| fedoraproject fedora | 33, 34 | — |
| netapp ontap_select_deploy_administration_utility | No range specified | — |
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