CVE-2023-48733
MEDIUMCVSS 6.7/10EPSS 0.26%
Last modified
CVE-2023-48733 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Canonical | Lxd | 5.0 | Candidate |
| Canonical | Lxd | 5.21 | Candidate |
| Tianocore | Edk2 | <= 2023.11-8 | — |
| Debian | Debian Linux | 10.0 | — |
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-48733Third Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2023-48733Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2023-48733?
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.
How severe is CVE-2023-48733?
CVE-2023-48733 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.
How do I fix CVE-2023-48733?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-48733?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST