Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability in the Jenkins Pipeline: Groovy plugin allowed for the bypass of security restrictions, enabling unauthorized code execution. This flaw could permit attackers who can influence pipeline scripts to run arbitrary commands on the Jenkins master system. Such an ability could lead to a significant compromise of the Jenkins environment and any connected systems.
- Jenkins Pipeline: Groovy plugin
- Sandbox security bypass
- Arbitrary code execution on Jenkins master
Attack Path
How an attacker could exploit the issue
This vulnerability allows an attacker who can control pipeline scripts to execute arbitrary code on the Jenkins master. This could lead to a compromise of the Jenkins environment. The attack leverages a sandbox bypass within the Jenkins Pipeline: Groovy Plugin.
- Exposure condition: Attacker controls pipeline scripts.
- Attacker starting point: Network access to Jenkins.
- Trigger and result: Arbitrary code execution on Jenkins master.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows attackers with the ability to control pipeline scripts to execute arbitrary code on the Jenkins master. This could lead to unauthorized access and control over the Jenkins environment. The exploit is considered critical and should be treated with urgency due to the potential for significant business risk.
- Likely attacker skill level: Low.
- Required access or conditions: Ability to control pipeline scripts.
- Business risk or urgency: Critical.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability allows unauthorized code execution on the Jenkins master if an attacker can control pipeline scripts. Organizations that utilize Jenkins Pipeline: Groovy Plugin versions prior to 2.63 face a critical risk that requires immediate attention. Remediation involves identifying affected systems, mitigating exposure, implementing vendor-supplied updates, and confirming the successful application of fixes to prevent further compromise.
- Locate all Jenkins instances using the affected plugin.
- Restrict pipeline script access and external network exposure.
- Update the plugin, verify the fix, and monitor activity.
