CVE-2021-21685

jenkins: FilePath#mkdirs does not check permission to create parent directories

Severity Score

9.1

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Jenkins 2.318 and earlier, LTS 2.303.2 and earlier does not check agent-to-controller access to create parent directories in FilePath#mkdirs.

Jenkins versiones 2.318 y anteriores, LTS versiones 2.303.2 y anteriores, no comprueban el acceso de agente a controlador para crear directorios padre en FilePath#mkdirs

An incorrect permissions validation vulnerability was found in Jenkins. The FilePath#mkdirs does not check permission to create parent directories, which may allow an attacker who controls the agent process to get read and write arbitrary files on the Jenkins controller file system.

Red Hat OpenShift Container Platform is Red Hat's cloud computing Kubernetes application platform solution designed for on-premise or private cloud deployments. This advisory contains the RPM packages for Red Hat OpenShift Container Platform 4.8.22. Issues addressed include a bypass vulnerability.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-01-04 CVE Reserved
2021-11-04 CVE Published
2024-08-03 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-281: Improper Preservation of Permissions
CWE-862: Missing Authorization

CAPEC

References (4)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2021/11/04/3	Mailing List

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455	2023-11-22
https://access.redhat.com/security/cve/CVE-2021-21685	2021-11-29
https://bugzilla.redhat.com/show_bug.cgi?id=2020322	2021-11-29

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Jenkins Search vendor "Jenkins"		Jenkins Search vendor "Jenkins" for product "Jenkins"				< 2.303.3 Search vendor "Jenkins" for product "Jenkins" and version " < 2.303.3"		lts		Affected
Jenkins Search vendor "Jenkins"		Jenkins Search vendor "Jenkins" for product "Jenkins"				< 2.319 Search vendor "Jenkins" for product "Jenkins" and version " < 2.319"		-		Affected