Spring Security Advisories

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Spring Expression DoS Vulnerability

MEDIUM | AUGUST 14, 2024 | CVE-2024-38808

Description

In Spring Framework, it is possible for a user to provide a specially crafted Spring Expression Language (SpEL) expression that may cause a denial of service (DoS) condition.

Specifically, an application is vulnerable when the following is true:

  • The application evaluates user-supplied SpEL expressions.

Affected Spring Products and Versions

Spring Framework:

  • 5.3.38 and earlier

Mitigation

Users of affected versions should upgrade to the corresponding fixed version.
Fix versionAvailability
5.3.39OSS

Evaluation of user-supplied SpEL expressions should be avoided when possible; otherwise, user-supplied SpEL expressions should be evaluated with a SimpleEvaluationContext in read-only mode. No other steps are necessary.

Credit

This issue was identified and responsibly reported by popko.

References

History

  • 2024-08-14: Initial vulnerability report published.

Reporting a vulnerability

To report a security vulnerability for a project within the Spring portfolio, see the Security Policy

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