CVE-2023-48733 Affecting edk2 package, versions <0~20191122.bd85bf54-2ubuntu3.5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UBUNTU2004-EDK2-6247626
- published16 Feb 2024
- disclosed14 Feb 2024
Introduced: 14 Feb 2024
CVE-2023-48733 (opens in a new tab)How to fix?
Upgrade Ubuntu:20.04 edk2 to version 0~20191122.bd85bf54-2ubuntu3.5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream edk2 package and not the edk2 package as distributed by Ubuntu.
See How to fix? for Ubuntu:20.04 relevant fixed versions and status.
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.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2023-48733
- 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