Multiple vulnerabilities in Jenkins Blue Ocean plugin

Published: 2020-09-22

Risk	Low
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-2254 CVE-2020-2255
CWE-ID	CWE-22 CWE-264
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	Blue Ocean Web applications / Modules and components for CMS
Vendor	Jenkins

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Path traversal

EUVDB-ID: #VU46880

Risk: Low

CVSSv4.0: 2.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-2254

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform directory traversal attacks.

The vulnerability exists due to the affected plugin provides an undocumented feature flag, "blueocean.features.GIT_READ_SAVE_TYPE", that when set to the value "clone". A remote authenticated attacker with Item/Configure or Item/Create permission can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Blue Ocean: 1.0.0 - 1.23.2

CPE2.3

External links

https://www.openwall.com/lists/oss-security/2020/09/16/3
https://www.jenkins.io/security/advisory/2020-09-16/#SECURITY-1956

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

2) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU46881

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-2255

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls