A flaw was found in grub2 in versions prior to 2.06. During USB device initialization, descriptors are read with very little bounds checking and assumes the USB device is providing sane values. If properly exploited, an attacker could trigger memory corruption leading to arbitrary code execution allowing a bypass of the Secure Boot mechanism. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.
|Base Score:||7.6||Base Metrics:||AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H|
|Access Vector:||Physical||Attack Complexity:||Low|
|Privileges Required:||None||User Interaction:||None|
|Integrity Impact:||High||Availability Impact:||High|
|Oracle Linux version 7 (grub2)||ELSA-2021-0699||2021-03-05|
|Oracle Linux version 7 (grub2)||ELSA-2021-9076||2021-03-02|
|Oracle Linux version 8 (grub2)||ELSA-2021-0696||2021-03-05|
|Oracle Linux version 8 (grub2)||ELSA-2021-9077||2021-03-02|
This page is generated automatically and has not been checked for errors or omissions. For clarification or corrections please contact the Oracle Linux ULN team