CVE-2021-20264

containers/openjdk: /etc/passwd is given incorrect privileges

Severity Score

7.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

An insecure modification flaw in the /etc/passwd file was found in the openjdk-1.8 and openjdk-11 containers. This flaw allows an attacker with access to the container to modify the /etc/passwd and escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

Se ha encontrado un fallo de modificación no seguro en el archivo /etc/passwd en los contenedores openjdk-1.8 y openjdk-11. Este defecto permite a un atacante con acceso al contenedor modificar el /etc/passwd y escalar sus privilegios. La mayor amenaza de esta vulnerabilidad es para la confidencialidad, la integridad y la disponibilidad del sistema

An insecure modification flaw in the /etc/passwd file was found in the openjdk-1.8 and openjdk-11 containers. This flaw allows an attacker with access to the container to modify /etc/passwd and escalate their privileges. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.

*Credits: N/A

CVSS Scores

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-17 CVE Reserved
2021-03-22 CVE Published
2023-04-29 EPSS Updated
2024-08-03 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-266: Incorrect Privilege Assignment
CWE-732: Incorrect Permission Assignment for Critical Resource

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://bugzilla.redhat.com/show_bug.cgi?id=1932283	2021-03-19
https://access.redhat.com/security/cve/CVE-2021-20264	2021-03-19
https://access.redhat.com/articles/4859371	2021-03-19

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Oracle Search vendor "Oracle"		Openjdk Search vendor "Oracle" for product "Openjdk"				1.8.0 Search vendor "Oracle" for product "Openjdk" and version "1.8.0"		-		Affected
Oracle Search vendor "Oracle"		Openjdk Search vendor "Oracle" for product "Openjdk"				11 Search vendor "Oracle" for product "Openjdk" and version "11"		-		Affected