Description

Applications serving static resources through the functional web frameworks WebMvc.fn or WebFlux.fn are vulnerable to path traversal attacks. An attacker can craft malicious HTTP requests and obtain any file on the file system that is also accessible to the process in which the Spring application is running.

This is similar to CVE-2024-38816, but with different input.

Similarly, an application is vulnerable when both of the following are true:

• the web application uses RouterFunctions to serve static resources
• resource handling is explicitly configured with a FileSystemResource location

Malicious requests are blocked and rejected whe the Spring Security HTTP Firewall is in use. Unlike CVE-2024-38816, applications deployed on Tomcat or Jetty are vulnerable.

Affected Spring Products and Versions

Spring Framework:

• 5.3.0 - 5.3.40
• 6.0.0 - 6.0.24
• 6.1.0 - 6.1.13
• Older, unsupported versions are also affected

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.

No further mitigation steps are necessary.

Credit

The issue was reported responsibly by Masato Anzai of Aeye Security Lab, Inc, and also by a second, anonymous reporter.

References

• https://nvd.nist.gov/vuln-metrics/cvss/v3-calculator?vector=AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N&version=3.1

History

• 2024-10-17 - Initial Report Published
• 2025-03-08 - Repeat conditions and mitigations similar to CVE-2024-38816
• 2025-03-26 - Unlike CVE-2024-38816, applications deployed on Tomcat or Jetty are vulnerable