CVE-2023-48733
First published: Wed Feb 14 2024(Updated: )
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.
Credit: security@ubuntu.com security@ubuntu.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| debian/edk2 | <=0~20181115.85588389-3+deb10u3<=2020.11-2+deb11u1<=2022.11-6 | 2020.11-2+deb11u2 2022.11-6+deb12u1 2024.02-2 |
| ubuntu/edk2 | <0~20191122. | 0~20191122. |
| ubuntu/edk2 | <2022.02-3ubuntu0.22.04.2 | 2022.02-3ubuntu0.22.04.2 |
| ubuntu/edk2 | <2023.05-2ubuntu0.1 | 2023.05-2ubuntu0.1 |
| ubuntu/edk2 | <2023.11-7 | 2023.11-7 |
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Reference Links
- https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137
- https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
- https://nvd.nist.gov/vuln/detail/CVE-2023-48733
- https://www.openwall.com/lists/oss-security/2024/02/14/4
- https://launchpad.net/bugs/cve/CVE-2023-48733
- https://security-tracker.debian.org/tracker/CVE-2023-48733
- https://ubuntu.com/security/notices/USN-6638-1
- https://www.cve.org/CVERecord?id=CVE-2023-48733
- https://ubuntu.com/security/CVE-2023-48733
- https://lists.debian.org/debian-lts-announce/2024/06/msg00028.html
Frequently Asked Questions
What is the severity of CVE-2023-48733?
CVE-2023-48733 is considered a high severity vulnerability as it allows an OS-resident attacker to bypass Secure Boot.
How do I fix CVE-2023-48733?
To fix CVE-2023-48733, upgrade your edk2 package to the remedied versions specified for your distribution.
Which versions of edk2 are affected by CVE-2023-48733?
CVE-2023-48733 affects specific versions of the edk2 package in Debian and Ubuntu, including versions up to 2020.11-2+deb11u1 for Debian and 0~20191122 for Ubuntu Focal.
What systems are impacted by CVE-2023-48733?
CVE-2023-48733 impacts systems running vulnerable versions of the edk2 package in Ubuntu and Debian distributions.
Is there a workaround for CVE-2023-48733?
Currently, there are no effective workarounds for CVE-2023-48733 other than upgrading to the secure versions of the edk2 package.
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