CVE-2020-27779: High severity centos grub2-pc-modules vulnerability
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.
Other sources
The grub2's cutmem command does not honor secure boot locking. This allows an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout.
— Red Hat
Affected Software
Event History
Frequently Asked Questions
What is CVE-2020-27779?
CVE-2020-27779 is a vulnerability found in grub2 in versions prior to 2.06.
What is the severity of CVE-2020-27779?
The severity of CVE-2020-27779 is high, with a CVSS score of 7.5.
How does CVE-2020-27779 impact secure boot?
CVE-2020-27779 allows a privileged attacker to remove address ranges from memory, circumventing SecureBoot protections.
Which versions of grub2 are affected by CVE-2020-27779?
Versions of grub2 prior to 2.06 are affected by CVE-2020-27779.
How can I fix CVE-2020-27779?
To fix CVE-2020-27779, update to grub2 version 2.06 or above.