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CVE

CVE-2021-4122

It was found that a specially crafted LUKS header could trick cryptsetup into disabling encryption during the recovery o

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.

MEDIUM · CVSS 4.3 EPSS 0.00105
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-345Insufficient Verification of Data Authenticity
CWE-345Insufficient Verification of Data Authenticity
▤

Affected Products & Versions

2
cryptsetup project cryptsetup< 2.3.7
cryptsetup project cryptsetup>= 2.4.0 and < 2.4.3
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.1 · secalert@redhat.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD24 Aug 2022 · 04:15 PM
CVSS VectorCVSS:3.1/AV:P/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
⚑

Vendor Advisories

8
suse-csafopenSUSE-SU-2024:11754-1
siemens-csafSSA-398330
msrcCVE-2021-4122
usnUSN-5286-1
suse-csafopenSUSE-SU-2022:0144-1
🔗

References & Sources

5
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://access.redhat.com/security/cve/CVE-2021-4122Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2031859Permissions RequiredThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2032401Issue TrackingThird Party Advisory
https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356cPatchThird Party Advisory
https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotesRelease NotesVendor Advisory
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