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Spring Framework, versions 5.0.x prior to 5.0.6 and versions 4.3.x prior to 4.3.17, and older unsupported versions allow applications to expose STOMP over WebSocket endpoints with a simple, in-memory STOMP broker through the spring-messaging module. A malicious user (or attacker) can craft a message to the broker that can lead to a regular expression, denial of service attack.
This vulnerability exposes applications that meet all of the following requirements:
Users of affected versions should apply the following mitigation:
There are no other mitigation steps necessary.
Note that the use of authentication and authorization for messages, both of which are provided by Spring Security, limits exposure to this vulnerability to authorized users.
This issue was identified and responsibly reported by Muneaki Nishimura (nishimunea) of Recruit Technologies Co., Ltd.
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.