CVE-2021-4122
cryptsetup: disable encryption via header rewrite
Severity Score
4.3
*CVSS v3.1
Exploit Likelihood
*EPSS
Affected Versions
*CPE
Public Exploits
0
*Multiple Sources
Exploited in Wild
-
*KEV
Decision
-
*SSVC
Descriptions
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.
Se ha detectado que un encabezado LUKS especialmente diseñada podía engañar a cryptsetup para que deshabilitara el cifrado durante la recuperación del dispositivo. Un atacante con acceso físico al medio, como un disco flash, podría usar este fallo para forzar a un usuario a deshabilitar permanentemente la capa de cifrado de ese medio.
*Credits:
N/A
CVSS Scores
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
* Common Vulnerability Scoring System
SSVC
- Decision:-
Exploitation
Automatable
Tech. Impact
* Organization's Worst-case Scenario
Timeline
- 2021-12-15 CVE Reserved
- 2022-02-02 CVE Published
- 2024-02-04 EPSS Updated
- 2024-08-03 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-345: Insufficient Verification of Data Authenticity
- CWE-349: Acceptance of Extraneous Untrusted Data With Trusted Data
CAPEC
References (4)
| URL | Tag | Source |
|---|
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://gitlab.com/cryptsetup/cryptsetup/-/commit/0113ac2d889c5322659ad0596d4cfc6da53e356c | 2022-08-29 |
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2021-4122 | 2022-02-01 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2032401 | 2022-02-01 | |
| https://mirrors.edge.kernel.org/pub/linux/utils/cryptsetup/v2.4/v2.4.3-ReleaseNotes | 2022-08-29 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Cryptsetup Project Search vendor "Cryptsetup Project" | Cryptsetup Search vendor "Cryptsetup Project" for product "Cryptsetup" | < 2.3.7 Search vendor "Cryptsetup Project" for product "Cryptsetup" and version " < 2.3.7" | - |
Affected
| ||||||
| Cryptsetup Project Search vendor "Cryptsetup Project" | Cryptsetup Search vendor "Cryptsetup Project" for product "Cryptsetup" | >= 2.4.0 < 2.4.3 Search vendor "Cryptsetup Project" for product "Cryptsetup" and version " >= 2.4.0 < 2.4.3" | - |
Affected
| ||||||