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CVE-2023-20873: CVE-2023-20873: Security Bypass With Wildcard Pattern Matching on Cloud Foundry

In Spring Boot versions 3.0.0 - 3.0.5, 2.7.0 - 2.7.10, and older unsupported versions, an application that is deployed to Cloud Foundry could be susceptible to a security bypass. Users of affected versions should apply the following mitigation: 3.0.x users should upgrade to 3.0.6+. 2.7.x users should upgrade to 2.7.11+. Users of older, unsupported versions should upgrade to 3.0.6+ or 2.7.11+.

CVE

Description

In Spring Boot versions 3.0.0 - 3.0.5, 2.7.0 - 2.7.10, and older unsupported versions, an application that is deployed to Cloud Foundry could be susceptible to a security bypass.

Specifically, an application is vulnerable when all of the following are true:

  • You have code that can handle requests that match /cloudfoundryapplication/. Typically, this will be if there is a catch-all request mapping which matches /.
  • The application is deployed to Cloud Foundry.

NOTE: Applications using Spring Cloud Config Server can handle requests to /cloudfoundryapplication/** by default and can be vulnerable if deployed to Cloud Foundry.

An application is not vulnerable if any of the following is true:

  • The application is not deployed to Cloud Foundry
  • You have disabled Cloud Foundry actuator endpoints with management.cloudfoundry.enabled set to false.
  • Your application does not have handler mappings that can handle requests to /cloudfoundryapplication/**.

Affected Spring Products and Versions

Spring Boot

  • 3.0.0 to 3.0.5
  • 2.7.0 to 2.7.10
  • Older, unsupported versions are also affected

Mitigation

Users of affected versions should apply the following mitigation: 3.0.x users should upgrade to 3.0.6+. 2.7.x users should upgrade to 2.7.11+. Users of older, unsupported versions should upgrade to 3.0.6+ or 2.7.11+.

Workarounds: Disable Cloud Foundry actuator endpoints by setting management.cloudfoundry.enabled to false.

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