GoogleOSV:GHSA-6Q78-6XVR-26FGJenkins Groovy Plugin sandbox bypass vulnerability
Jenkins Script Security sandbox protection could be circumvented during the script compilation phase by applying AST transforming annotations such as @Grab to source code elements.
Both the pipeline validation REST APIs and actual script/pipeline execution are affected.
This allowed users with Overall/Read permission, or able to control Jenkinsfile or sandboxed Pipeline shared library contents in SCM, to bypass the sandbox protection and execute arbitrary code on the Jenkins controller.
All known unsafe AST transformations in Groovy are now prohibited in sandboxed scripts.
References
packetstormsecurity.com/files/152132/Jenkins-ACL-Bypass-Metaprogramming-Remote-Code-Execution.html
www.rapid7.com/db/modules/exploit/multi/http/jenkins_metaprogramming
access.redhat.com/errata/RHBA-2019:0326
access.redhat.com/errata/RHBA-2019:0327
github.com/jenkinsci/pipeline-model-definition-plugin/commit/6d7884dec610bf34503d24d494d994e9fc607642
github.com/jenkinsci/script-security-plugin/commit/2c5122e50742dd16492f9424992deb21cc07837c
github.com/jenkinsci/workflow-cps-plugin/commit/66c3e7aafe7888d4e1fe9995a688bb3fb742d742
jenkins.io/security/advisory/2019-01-08/#SECURITY-1266
nvd.nist.gov/vuln/detail/CVE-2019-1003001
www.exploit-db.com/exploits/46572
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