Vulnerability · Published Feb 14, 2024 · Assigned by canonical
CVE-2023-48733
Medium 6.7
In plain English
A medium-severity security flaw in Ubuntu EDK II from Canonical Ltd.. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.7Medium
Exploit odds (30 days)0.3%top 82.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | edk2 | 2022.11-6+deb12u1 | DEBIAN-CVE-2023-48733 |
| Debian:12 | edk2 | 2022.11-6+deb12u1 | DSA-5624-1 |
| Debian:13 | edk2 | 2023.11-7 | DEBIAN-CVE-2023-48733 |
| Debian:14 | edk2 | 2023.11-7 | DEBIAN-CVE-2023-48733 |
| Ubuntu:22.04:LTS | edk2 | 2022.02-3ubuntu0.22.04.2 | USN-6638-1 |
| Ubuntu:22.04:LTS | edk2 | 2022.02-3ubuntu0.22.04.2 | UBUNTU-CVE-2023-48733 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Canonical Ltd. | Ubuntu EDK II | 0 – before 2023.05-2ubuntu0.1 |
Weakness: CWE-1188 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
References
- https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137 issue-tracking
- https://nvd.nist.gov/vuln/detail/CVE-2023-48733 issue-tracking
- https://www.openwall.com/lists/oss-security/2024/02/14/4 mailing-list
- https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139 issue-tracking
- https://lists.debian.org/debian-lts-announce/2024/06/msg00028.html