CVE-2021-4122
MEDIUM
4.3
CVSS Score
Published: August 24, 2022 at 03:08 PM UTC
Updated: October 14, 2026 at 11:16 AM UTC
2 products affected across 2 vendorsCryptsetupProject Cryptsetup
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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.3%
Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 2.3.72.4.0 ≤ v < 2.4.3
Affected range stops below 2.3.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.4.3, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (6)
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2021-4122x_refsource_MISCPermissions RequiredThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2031859x_refsource_MISCIssue TrackingThird Party Advisory
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2032401x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356cx_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotesSource: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
https://cert-portal.siemens.com/productcert/html/ssa-398330.htmlCVSS
- Attack Vector
- PHYSICAL
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-345
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