CVE-2021-21686

CVSS V2 Medium 5.8 CVSS V3 High 8.1

Description

File path filters in the agent-to-controller security subsystem of Jenkins 2.318 and earlier, LTS 2.303.2 and earlier do not canonicalize paths, allowing operations to follow symbolic links to outside allowed directories.

Overview

CVE ID
CVE-2021-21686

Assigner
jenkinsci-cert@googlegroups.com

Vulnerability Status
Analyzed

Published Version
2021-11-04T17:15:08

Last Modified Date
2021-11-08T14:38:53

Weakness Enumerations

CWE	URL
CWE-59	http://cwe.mitre.org/data/definitions/59.html

CPE Configuration (Product)

CPE	Vulnerable	Operator	Version Start	Version End
cpe:2.3:a:jenkins:jenkins:::::lts:::*	1	OR		2.303.3
cpe:2.3:a:jenkins:jenkins:::::-:::*	1	OR		2.319

CVSS Version 2

Version
2.0

Vector String
AV:N/AC:M/Au:N/C:P/I:P/A:N

Access Vector
NETWORK

Access Compatibility
MEDIUM

Authentication
NONE

Confidentiality Impact
PARTIAL

Integrity Impact
PARTIAL

Availability Impact
NONE

Base Score
5.8

Severity
MEDIUM

Exploitability Score
8.6

Impact Score
4.9

CVSS Version 3

Version
3.1

Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Attack Vector
NETWORK

Attack Compatibility
LOW

Privileges Required
NONE

User Interaction
REQUIRED

Scope
UNCHANGED

Confidentiality Impact
HIGH

Availability Impact
NONE

Base Score
8.1

Base Severity
HIGH

Exploitability Score
2.8

Impact Score
5.2

References

Reference URL	Reference Tags
https://www.jenkins.io/security/advisory/2021-11-04/#SECURITY-2455	Vendor Advisory

Sources

Source Name	Source URL
NIST	https://nvd.nist.gov/vuln/detail/CVE-2021-21686
MITRE	https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-21686

History

Created	Old Value	New Value	Data Type	Notes
2022-05-10 06:48:03				Added to TrackCVE
2022-12-05 13:51:30	2021-11-04T17:15Z	2021-11-04T17:15:08	CVE Published Date	updated
2022-12-05 13:51:30		2021-11-08T14:38:53	CVE Modified Date	updated
2022-12-05 13:51:30		Analyzed	Vulnerability Status	updated