An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntus EDK2. This allows an OS-resident attacker to bypass Secure Boot.
Weakness
The product initializes or sets a resource with a default that is intended to be changed by the product’s installer, administrator, or maintainer, but the default is not secure.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Lxd | Canonical | 5.0-candidate (including) | 5.0-candidate (including) |
| Lxd | Canonical | 5.21-candidate (including) | 5.21-candidate (including) |
| Lxd | Canonical | 5.21-edge (including) | 5.21-edge (including) |
| Edk2 | Tianocore | * | 2023.11-8 (including) |
| Edk2 | Ubuntu | bionic | * |
| Edk2 | Ubuntu | devel | * |
| Edk2 | Ubuntu | esm-infra/focal | * |
| Edk2 | Ubuntu | focal | * |
| Edk2 | Ubuntu | jammy | * |
| Edk2 | Ubuntu | lunar | * |
| Edk2 | Ubuntu | mantic | * |
| Edk2 | Ubuntu | noble | * |
| Edk2 | Ubuntu | oracular | * |
| Edk2 | Ubuntu | plucky | * |
| Edk2 | Ubuntu | questing | * |
| Edk2 | Ubuntu | trusty | * |
| Edk2 | Ubuntu | xenial | * |
Related Attack Patterns
References
- https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137
- https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
- https://lists.debian.org/debian-lts-announce/2024/06/msg00028.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-48733
- https://www.openwall.com/lists/oss-security/2024/02/14/4
- https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137
- https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
- https://lists.debian.org/debian-lts-announce/2024/06/msg00028.html
- https://nvd.nist.gov/vuln/detail/CVE-2023-48733
- https://www.openwall.com/lists/oss-security/2024/02/14/4