Vulnerability in Cryptsetup Project
CVE-2021-4122
It was found that a specially crafted LUKS header could trick cryptsetup into disabling encryption during the recovery of the device. An attacker with physical access to the medium, such as a flash disk, could use this flaw to force a user into permanently disabling the encryption layer of that medium.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.6% 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
- Cryptsetup Project
- Cryptsetup — versions Fixed in cryptsetup 2.4.3, cryptsetup 2.3.7
Weakness classification (CWE)
References
- bugzilla.redhat.com/show_bug.cgi (Permissions Required, Third Party Advisory)
- mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotes (Release Notes, Vendor Advisory)
- gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e3… (Patch, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- access.redhat.com/security/cve/CVE-2021-4122 (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-4122?
- CVE-2021-4122 is a medium-severity vulnerability in Cryptsetup Project, classified under Insufficient Verification of Data Authenticity. CVSS score: 4.3/10. Published 2022-08-24.
- How severe is CVE-2021-4122?
- Medium severity. CVSS v3 base score is 4.3 out of 10.