#VU49531 Permissions, Privileges, and Access Controls in Jenkins and Jenkins LTS - CVE-2021-21609

Published: 2021-01-13 | Updated: 2021-01-14

Vulnerability identifier: #VU49531

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-21609

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Jenkins
Server applications / Application servers
Jenkins LTS
Server applications / Application servers

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to gain access to sensitive information on the system.

The vulnerability exists due to a missing permission check for paths with specific prefix. A remote attacker can access plugin-provided URLs.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Jenkins: 2.0 - 240

Jenkins LTS: 2.7.1 - 2.263.1

External links
https://www.jenkins.io/security/advisory/2021-01-13/#SECURITY-2047

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.