SB2019082821 - Remote code execution in Splunk plugin for Jenkins

Description

This security bulletin contains information about 1 vulnerability.

1) Permissions, Privileges, and Access Controls (CVE-ID: CVE-2019-10390)

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the affected software has a form validation HTTP endpoint used to validate a user-submitted Groovy script through compilation, which was not subject to sandbox protection. A remote authenticated attacker with Overall/Read access can execute arbitrary code on the Jenkins master by applying AST transforming annotations such as "@Grab" to source code elements.

Remediation

Install update from vendor's website.

References

• http://www.openwall.com/lists/oss-security/2019/08/28/4
• https://jenkins.io/security/advisory/2019-08-28/#SECURITY-1294