CVE-2020-27779

Related Vulnerabilities: CVE-2020-27779  

A flaw was found in grub2. 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.

Description

A flaw was found in grub2. 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.

Additional Information

  • Bugzilla 1900698: CVE-2020-27779 grub2: cutmem command allows privileged user to remove memory regions when Secure Boot is enabled
  • CWE-285: Improper Authorization
  • FAQ: Frequently asked questions about CVE-2020-27779