CVE-2020-2166 RCE vulnerability in Jenkins Pipeline: AWS Steps Plugin

What is CVE-2020-2166?

CVE-2020-2166 is a high-severity unsafe deserialization vulnerability in Jenkins Pipeline: AWS Steps Plugin, published on 25 Mar 2020. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Jenkins Pipeline: AWS Steps Plugin 1.40 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types, resulting in a remote code execution vulnerability.

Weakness: CWE-20

Which versions are affected by CVE-2020-2166?

2 open source packages ship an affected version, including de.taimos:pipeline-aws. It affects 1 product.

Products include Jenkins Pipeline\.

How do I fix CVE-2020-2166?

Upgrade de.taimos:pipeline-aws to 1.41 or later.

Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.

Is CVE-2020-2166 being exploited?

There is no known exploitation of CVE-2020-2166 in the wild and no public exploit code.

Other vulnerabilities in Jenkins Pipeline: AWS Steps Plugin

• CVE-2019-1003030 Jenkins Matrix Project Plugin Remote Code Execution Exploited Critical 9.9
• CVE-2022-43402 Jenkins Pipeline: Groovy Plugin allows sandbox protection bypass and arbitrary code execution Critical 9.9
• CVE-2019-1003041 Sandbox bypass vulnerability in Jenkins Pipeline: Groovy Plugin Critical 9.8
• CVE-2022-43407 CSRF protection for any URL can be bypassed in Jenkins Pipeline: Input Step Plugin High 8.8
• CVE-2022-25173 Improper Neutralization of Special Elements used in an OS Command in Jenkins Pipeline: Groovy Plugin High 8.8

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-w598-25hm-jqx3.