Rapid7 Vulnerability & Exploit Database

Oracle Linux: CVE-2022-3775: ELSA-2023-12019: grub2 security update (IMPORTANT) (Multiple Advisories)

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

Oracle Linux: CVE-2022-3775: ELSA-2023-12019: grub2 security update (IMPORTANT) (Multiple Advisories)

Severity
6
CVSS
(AV:L/AC:L/Au:S/C:N/I:C/A:C)
Published
11/15/2022
Created
01/17/2023
Added
01/13/2023
Modified
07/22/2024

Description

When rendering certain unicode sequences, grub2's font code doesn't proper validate if the informed glyph's width and height is constrained within bitmap size. As consequence an attacker can craft an input which will lead to a out-of-bounds write into grub2's heap, leading to memory corruption and availability issues. Although complex, arbitrary code execution could not be discarded. A flaw was found in the grub2 font code. When rendering certain unicode sequences, it fails to properly validate the font width and height. These values are further used to access the font buffer, causing possible out-of-bounds writes. A malicious actor may craft a font capable of triggering this issue, allowing modifications in unauthorized memory segments, causing data integrity problems or leading to denial of service.

Solution(s)

  • oracle-linux-upgrade-grub2-common
  • oracle-linux-upgrade-grub2-efi-aa64
  • oracle-linux-upgrade-grub2-efi-aa64-cdboot
  • oracle-linux-upgrade-grub2-efi-aa64-modules
  • oracle-linux-upgrade-grub2-efi-ia32
  • oracle-linux-upgrade-grub2-efi-ia32-cdboot
  • oracle-linux-upgrade-grub2-efi-ia32-modules
  • oracle-linux-upgrade-grub2-efi-x64
  • oracle-linux-upgrade-grub2-efi-x64-cdboot
  • oracle-linux-upgrade-grub2-efi-x64-modules
  • oracle-linux-upgrade-grub2-pc
  • oracle-linux-upgrade-grub2-pc-modules
  • oracle-linux-upgrade-grub2-tools
  • oracle-linux-upgrade-grub2-tools-efi
  • oracle-linux-upgrade-grub2-tools-extra
  • oracle-linux-upgrade-grub2-tools-minimal

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;