VMware offers training and certification to turbo-charge your progress.Learn more
Spring Security, versions 5.7 prior to 5.7.5, and 5.6 prior to 5.6.9, and older unsupported versions could be susceptible to a privilege escalation under certain conditions. A malicious user or attacker can modify a request initiated by the Client (via the browser) to the Authorization Server which can lead to a privilege escalation on the subsequent approval. This scenario can happen if the Authorization Server responds with an OAuth2 Access Token Response containing an empty scope list (per RFC 6749, Section 5.1) on the subsequent request to the token endpoint to obtain the access token.
This vulnerability exposes applications that meet all of the following requirements:
anyRequest().hasAuthority("SCOPE_message.write")) in the client application
This vulnerability does not expose applications that:
anyRequest().hasAuthority("ROLE_USER")) in the client application
Users of affected versions should apply the following mitigation: Spring Security 5.7 to 5.7.5, Spring Security 5.6 to 5.6.9. Older versions should upgrade to a supported branch. There are no other mitigation steps required. Releases that have fixed this issue include:
This issue was identified and responsibly reported by Tobias Soloschenko (@klopfdreh) from Apache Software Foundation.
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.