CVE-2020-2121 RCE vulnerability in Google Kubernetes Engine Plugin
Remote attackers can execute arbitrary code via unsafe YAML deserialization in the Jenkins Google Kubernetes Engine Plugin.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-2121?
CVE-2020-2121 is a high-severity unsafe deserialization vulnerability in Jenkins Google Kubernetes Engine Plugin, published on 12 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Jenkins Google Kubernetes Engine Plugin 0.8.0 and earlier does not configure its YAML parser to prevent the instantiation of arbitrary types, resulting in a remote code execution vulnerability.
Which versions are affected by CVE-2020-2121?
2 open source packages ship an affected version, including org.jenkins-ci.plugins:google-kubernetes-engine. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.jenkins-ci.plugins:google-kubernetes-engine Maven | All versions | 0.8.1 |
org.jenkins-ci.plugins:google-kubernetes-engine Maven | All versions | 0.8.1 |
Products include Jenkins Google Kubernetes Engine.
How do I fix CVE-2020-2121?
Upgrade org.jenkins-ci.plugins:google-kubernetes-engine to 0.8.1 or later.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2020-2121 being exploited?
There is no known exploitation of CVE-2020-2121 in the wild and no public exploit code.
Other vulnerabilities in Jenkins Google Kubernetes Engine Plugin
Sources
Also known as GHSA-wf76-qgqq-gcfj.