CVE-2021-3746

Severity Score

6.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

A flaw was found in the libtpms code that may cause access beyond the boundary of internal buffers. The vulnerability is triggered by specially-crafted TPM2 command packets that then trigger the issue when the state of the TPM2's volatile state is written. The highest threat from this vulnerability is to system availability. This issue affects libtpms versions before 0.8.5, before 0.7.9 and before 0.6.6.

Se ha encontrado un fallo en el código de libtpms que puede causar un acceso más allá de los límites de los búferes internos. La vulnerabilidad es desencadenada mediante paquetes de comandos del TPM2 especialmente diseñados que luego desencadenan el problema cuando es escrito el estado volátil del TPM2. La mayor amenaza de esta vulnerabilidad es la disponibilidad del sistema. Este problema afecta a libtpms versiones anteriores a 0.8.5, 0.7.9 y 0.6.6

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-27 CVE Reserved
2021-10-19 CVE Published
2024-07-04 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer

CAPEC

References (1)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1998588	2021-10-22

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Libtpms Project Search vendor "Libtpms Project"		Libtpms Search vendor "Libtpms Project" for product "Libtpms"				>= 0.6.0 < 0.6.6 Search vendor "Libtpms Project" for product "Libtpms" and version " >= 0.6.0 < 0.6.6"		-		Affected
Libtpms Project Search vendor "Libtpms Project"		Libtpms Search vendor "Libtpms Project" for product "Libtpms"				>= 0.7.0 < 0.7.9 Search vendor "Libtpms Project" for product "Libtpms" and version " >= 0.7.0 < 0.7.9"		-		Affected
Libtpms Project Search vendor "Libtpms Project"		Libtpms Search vendor "Libtpms Project" for product "Libtpms"				>= 0.8.0 < 0.8.5 Search vendor "Libtpms Project" for product "Libtpms" and version " >= 0.8.0 < 0.8.5"		-		Affected
Fedoraproject Search vendor "Fedoraproject"		Fedora Search vendor "Fedoraproject" for product "Fedora"				34 Search vendor "Fedoraproject" for product "Fedora" and version "34"		-		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
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"		advanced_virtualization		Affected