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Ubuntu: USN-6355-1 (CVE-2021-3697): GRUB2 vulnerabilities

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Ubuntu: USN-6355-1 (CVE-2021-3697): GRUB2 vulnerabilities

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/06/2022
Created
09/18/2023
Added
09/18/2023
Modified
10/23/2024

Description

A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.

Solution(s)

  • ubuntu-upgrade-grub-efi-amd64
  • ubuntu-upgrade-grub-efi-amd64-bin
  • ubuntu-upgrade-grub-efi-amd64-signed
  • ubuntu-upgrade-grub-efi-arm64
  • ubuntu-upgrade-grub-efi-arm64-bin
  • ubuntu-upgrade-grub-efi-arm64-signed
  • ubuntu-upgrade-shim
  • ubuntu-upgrade-shim-signed

References

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