Vulnerability identifier: #VU29521

Vulnerability risk: Medium

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:U/RC:C]

CVE-ID: CVE-2020-2211

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
ElasticBox Kubernetes CI/CD
Web applications / Modules and components for CMS

Vendor: Jenkins

Description

The vulnerability allows a remote attacker to execute arbitrary code on the system

The vulnerability exists due to the affected software does not configure its YAML parser to prevent the instantiation of arbitrary types. A remote authenticated attacker can execute arbitrary code on the target system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

ElasticBox Kubernetes CI/CD: 0.1 - 1.3

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External links
http://www.openwall.com/lists/oss-security/2020/07/02/7
http://jenkins.io/security/advisory/2020-07-02/#SECURITY-1738

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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. However, proof of concept for this vulnerability is available.