#VU22916 Improper access control in Script Security - CVE-2019-16538

Vulnerability identifier: #VU22916

Vulnerability risk: High

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:Amber]

CVE-ID: CVE-2019-16538

CWE-ID: CWE-284

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Script Security
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to bypass sandbox restrictions.

The vulnerability exists due to improper access restrictions. A remote authenticated attacker can circumvent the Sandbox protection through closure default parameter expressions and execute arbitrary code on the Jenkins master JVM.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Script Security: 1.0 - 1.67

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External links
https://jenkins.io/security/advisory/2019-11-21/#SECURITY-1658

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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.