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Spring Boot supports an embedded launch script that can be used to easily run the application as a systemd or init.d linux service. The script included with Spring Boot 1.5.9 and earlier is susceptible to a symlink attack which allows the “run_user” to overwrite and take ownership of any file on the same system.
In order to instigate the attack, the application must be installed as a service and the “run_user” requires shell access to the server.
Spring Boot application that are not installed as a service, or are not using the embedded launch script are not susceptible.
Users of affected versions should apply the following mitigation:
This issue was identified and reported by Adam Stephens from Oracle Cloud Operations, UK and responsibly reported to Pivotal.
The VMware Security Response team provides a single point of contact for the reporting of security vulnerabilities in VMware Tanzu products and coordinates the process of investigating any reported vulnerabilities.
To report a security vulnerability in a VMware service or product please refer to the VMware Security Response Policy.