// For flags

CVE-2021-3565

tpm2-tools: fixed AES wrapping key in tpm2_import

Severity Score

5.9
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

-
*SSVC
Descriptions

A flaw was found in tpm2-tools in versions before 5.1.1 and before 4.3.2. tpm2_import used a fixed AES key for the inner wrapper, potentially allowing a MITM attacker to unwrap the inner portion and reveal the key being imported. The highest threat from this vulnerability is to data confidentiality.

Se ha encontrado un fallo en tpm2-tools en versiones anteriores a 5.1.1 y versiones anteriores a la 4.3.2. La función tpm2_import usaba una clave AES fija para el contenedor inner, permitiendo potencialmente a un atacante MITM desenvolver la parte interna y revelar la clave que está siendo importada. La mayor amenaza de esta vulnerabilidad es la confidencialidad de los datos

A flaw was found in tpm2-tools. tpm2_import used a fixed AES key for the inner wrapper, potentially allowing a MITM attacker to unwrap the inner portion and reveal the key being imported. The highest threat from this vulnerability is to data confidentiality.

*Credits: N/A
CVSS Scores
Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Attack Vector
Network
Attack Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
None
Availability
None
* Common Vulnerability Scoring System
SSVC
  • Decision:-
Exploitation
-
Automatable
-
Tech. Impact
-
* Organization's Worst-case Scenario
Timeline
  • 2021-05-25 CVE Reserved
  • 2021-06-04 CVE Published
  • 2024-02-18 EPSS Updated
  • 2024-08-03 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-665: Improper Initialization
  • CWE-798: Use of Hard-coded Credentials
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Tpm2-tools Project
Search vendor "Tpm2-tools Project"
 Tpm2-tools
Search vendor "Tpm2-tools Project" for product "Tpm2-tools"
 < 4.3.2
Search vendor "Tpm2-tools Project" for product "Tpm2-tools" and version " < 4.3.2"
-
Affected
Tpm2-tools Project
Search vendor "Tpm2-tools Project"
 Tpm2-tools
Search vendor "Tpm2-tools Project" for product "Tpm2-tools"
 >= 5.1 < 5.1.1
Search vendor "Tpm2-tools Project" for product "Tpm2-tools" and version " >= 5.1 < 5.1.1"
-
Affected
Redhat
Search vendor "Redhat"
 Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
 8.0
Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 33
Search vendor "Fedoraproject" for product "Fedora" and version "33"
-
Affected
Fedoraproject
Search vendor "Fedoraproject"
 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 34
Search vendor "Fedoraproject" for product "Fedora" and version "34"
-
Affected