Vulnerability Details : 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.
Products affected by CVE-2021-4122
- cpe:2.3:a:cryptsetup_project:cryptsetup:*:*:*:*:*:*:*:*
- cpe:2.3:a:cryptsetup_project:cryptsetup:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-4122
0.05%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 12 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-4122
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
4.3
|
MEDIUM | CVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N |
0.7
|
3.6
|
NIST |
CWE ids for CVE-2021-4122
-
The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.Assigned by:
- nvd@nist.gov (Primary)
- secalert@redhat.com (Secondary)
References for CVE-2021-4122
-
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotes
Release Notes;Vendor Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=2031859
Bug Access DeniedPermissions Required;Third Party Advisory
-
https://access.redhat.com/security/cve/CVE-2021-4122
CVE-2021-4122- Red Hat Customer PortalThird Party Advisory
-
https://bugzilla.redhat.com/show_bug.cgi?id=2032401
2032401 – (CVE-2021-4122) CVE-2021-4122 cryptsetup: disable encryption via header rewriteIssue Tracking;Third Party Advisory
-
https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356c
Fix CVE-2021-4122 - LUKS2 reencryption crash recovery attack (0113ac2d) · Commits · cryptsetup / cryptsetup · GitLabPatch;Third Party Advisory
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