Advisory Published

USN-6410-1: GRUB2 vulnerabilities

First published: Wed Oct 04 2023(Updated: )

It was discovered that a specially crafted file system image could cause a heap-based out-of-bounds write. A local attacker could potentially use this to perform arbitrary code execution bypass and bypass secure boot protections. (CVE-2023-4692) It was discovered that a specially crafted file system image could cause an out-of-bounds read. A physically-present attacker could possibly use this to leak sensitive information to the GRUB pager. (CVE-2023-4693)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/grub-efi-amd64<2.06-2ubuntu17.2
2.06-2ubuntu17.2
Ubuntu Ubuntu=23.04
All of
ubuntu/grub-efi-amd64-bin<2.06-2ubuntu17.2
2.06-2ubuntu17.2
Ubuntu Ubuntu=23.04
All of
ubuntu/grub-efi-amd64-signed<1.193.2+2.06-2ubuntu17.2
1.193.2+2.06-2ubuntu17.2
Ubuntu Ubuntu=23.04
All of
ubuntu/grub-efi-arm64<2.06-2ubuntu17.2
2.06-2ubuntu17.2
Ubuntu Ubuntu=23.04
All of
ubuntu/grub-efi-arm64-bin<2.06-2ubuntu17.2
2.06-2ubuntu17.2
Ubuntu Ubuntu=23.04
All of
ubuntu/grub-efi-arm64-signed<1.193.2+2.06-2ubuntu17.2
1.193.2+2.06-2ubuntu17.2
Ubuntu Ubuntu=23.04
All of
ubuntu/grub-efi-amd64<2.06-2ubuntu14.4
2.06-2ubuntu14.4
Ubuntu Ubuntu=22.04
All of
ubuntu/grub-efi-amd64-bin<2.06-2ubuntu14.4
2.06-2ubuntu14.4
Ubuntu Ubuntu=22.04
All of
ubuntu/grub-efi-amd64-signed<1.187.6+2.06-2ubuntu14.4
1.187.6+2.06-2ubuntu14.4
Ubuntu Ubuntu=22.04
All of
ubuntu/grub-efi-arm64<2.06-2ubuntu14.4
2.06-2ubuntu14.4
Ubuntu Ubuntu=22.04
All of
ubuntu/grub-efi-arm64-bin<2.06-2ubuntu14.4
2.06-2ubuntu14.4
Ubuntu Ubuntu=22.04
All of
ubuntu/grub-efi-arm64-signed<1.187.6+2.06-2ubuntu14.4
1.187.6+2.06-2ubuntu14.4
Ubuntu Ubuntu=22.04
All of
ubuntu/grub-efi-amd64-signed<1.187.6~20.04.1+2.06-2ubuntu14.4
1.187.6~20.04.1+2.06-2ubuntu14.4
Ubuntu Ubuntu=20.04
All of
ubuntu/grub-efi-arm64-signed<1.187.6~20.04.1+2.06-2ubuntu14.4
1.187.6~20.04.1+2.06-2ubuntu14.4
Ubuntu Ubuntu=20.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the vulnerability ID for this advisory?

    The vulnerability ID for this advisory is USN-6410-1.

  • What is the severity of USN-6410-1?

    The severity of USN-6410-1 is not mentioned.

  • How does the vulnerability in USN-6410-1 work?

    The vulnerability in USN-6410-1 allows a specially crafted file system image to cause a heap-based out-of-bounds write, potentially leading to arbitrary code execution and bypassing secure boot protections.

  • Which software versions are affected by USN-6410-1?

    The affected software versions are Ubuntu 23.04, Ubuntu 22.04, and Ubuntu 20.04.

  • How can I fix USN-6410-1?

    To fix USN-6410-1, you can update the affected packages to the recommended versions mentioned in the advisory.

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