This security advisory describes one high risk vulnerability.

1) Permissions, Privileges, and Access Controls

Severity: High

CVSSv3:
7.7 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID:
CVE-2020-2109

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

Description


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

The vulnerability exists due to the sandbox protection in the affected
plugin can be circumvented through default parameter expressions in CPS-transformed methods. A remote authenticated attacker can specify and run
sandboxed Pipelines to execute arbitrary code in the context of the
Jenkins master JVM.

Mitigation

Install updates from vendor’s website.

Vulnerable software versions

Pipeline: Groovy:
2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 2.10, 2.11, 2.12, 2.13, 2.14, 2.15, 2.16, 2.17, 2.18, 2.19, 2.20, 2.21, 2.22, 2.23, 2.24, 2.25, 2.26, 2.27, 2.28, 2.29, 2.30, 2.31, 2.32, 2.33, 2.34, 2.35, 2.36, 2.36.1, 2.37, 2.38, 2.39, 2.40, 2.41, 2.42, 2.43, 2.44, 2.45, 2.46, 2.46.1, 2.46.2, 2.47, 2.48, 2.49, 2.50, 2.51, 2.52, 2.53, 2.54, 2.54.1, 2.54.2, 2.55, 2.56, 2.57, 2.57.1, 2.57.2, 2.57.3, 2.58, 2.59, 2.60, 2.61, 2.61.1, 2.61.2, 2.61.3, 2.62, 2.63, 2.64, 2.65, 2.66, 2.66.1, 2.67, 2.68, 2.69, 2.70, 2.71, 2.72, 2.73, 2.74, 2.74.1, 2.75, 2.76, 2.77, 2.78

CPE
External links

http://www.openwall.com/lists/oss-security/2020/02/12/3
https://jenkins.io/security/advisory/2020-02-12/#SECURITY-1710

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.





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