A sandbox bypass vulnerability exists in Pipeline: Groovy Plugin 2.61 and earlier in src/main/java/org/jenkinsci/plugins/workflow/cps/CpsFlowDefinition.java, src/main/java/org/jenkinsci/plugins/workflow/cps/CpsGroovyShellFactory.java that allows attackers with Overall/Read permission to provide a pipeline script to an HTTP endpoint that can result in arbitrary code execution on the Jenkins master JVM.

Affected: Maven: org.jenkins-ci.plugins.workflow:workflow-cps-parent, Maven: org.jenkins-ci.plugins:pipeline-model-definition, Maven: org.jenkins-ci.plugins:script-security

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.

haproxy: Out-of-bounds read in dns.c:dns_validate_dns_response() allows for memory disclosure haproxy: Infinite recursion via crafted packet allows stack exhaustion and denial of service haproxy: Mishandling of priority flag in short HEADERS frame by HTTP/2 decoder allows for crash jenkins-plugin-script-security: Sandbox Bypass in finalize methods jenkins-plugin-script-security: Sandbox Bypass in finalize methods prometheus: Stored DOM cross-site scripting (XSS) attack via crafted URL jenkins-plugin-script-security: Sandbox Bypass in Script Security Plugin jenkins-plugin-workflow-cps: Sandbox Bypass in Pipeline: Groovy Plugin jenkins-plugin-pipeline-model-definition: Sandbox Bypass in Pipeline: Declarative jenkins: cookie crafted using Jenkins script console allows unauthorised access to Jenkins instance jenkins: deleting a user record will does not invalidate existing sessions jenkins-plugin-git: CSRF vulnerability in Git Plugin (SECURITY-1095) jenkins-plugin-token-macro: Recursive token expansion results in information disclosure and DoS in Token Macro Plugin (SECURITY-1102) jenkins-plugin-blueocean: Blue Ocean did not require CSRF tokens (SECURITY-1201) jenkins-plugin-blueocean: XSS vulnerability via user description in Blue Ocean (SECURITY-1204) jenkins-plugin-config-file-provider: Stored XSS vulnerability in Config File Provider Plugin (SECURITY-1253)