RCE in Canonical Ltd. Ubuntu Edk Ii
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (15.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Canonical Ltd. Ubuntu Edk Ii — versions 0
- Tianocore Edk2
- Canonical Lxd — versions 5.0, 5.21
- Debian Linux — versions 10.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137 (issue-tracking, Issue Tracking)
- nvd.nist.gov/vuln/detail/CVE-2023-48733 (issue-tracking, Third Party Advisory)
- www.openwall.com/lists/oss-security/2024/02/14/4 (mailing-list, Mailing List)
- bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139 (issue-tracking, Issue Tracking)
- lists.debian.org/debian-lts-announce/2024/06/msg00028.html (Mailing List)
Frequently asked questions
- What is CVE-2023-48733?
- CVE-2023-48733 is a medium-severity vulnerability in Canonical Ltd. Ubuntu Edk Ii, classified under Initialization of a Resource with an Insecure Default. CVSS score: 6.7/10. Published 2024-02-14.
- How severe is CVE-2023-48733?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2023-48733 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.