Sandbox restrictions bypass in Jenkins Script Security plugin

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU47187

Risk: Medium

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-2279

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

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the sandbox protection bypass in the affected plugin. A remote authenticated attacker can provide a specially crafted return values or script binding content and execute arbitrary code on the Jenkins controller JVM.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Script Security: 1.0 beta-1 - 1.74

CPE2.3

• cpe:2.3:a:jenkins:script-security:1.0:beta-1:*:*:*:jenkins:*:*
• cpe:2.3:a:jenkins:script-security:1.0:beta-2:*:*:*:jenkins:*:*
• cpe:2.3:a:jenkins:script-security:1.0:beta-3:*:*:*:jenkins:*:*

External links

https://www.openwall.com/lists/oss-security/2020/09/23/1
https://www.jenkins.io/security/advisory/2020-09-23/#SECURITY-2020

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.