CVE-2023-20883 is a high-severity vulnerability affecting certain versions of Spring Boot, a widely-used framework for building applications. This vulnerability can potentially lead to denial-of-service (DoS) attacks when Spring Boot is used with a reverse proxy cache. To protect your system, it's important to upgrade to the latest, secure version of Spring Boot and follow recommended mitigation strategies.

How do I know if I'm affected?

If you're using Spring Boot, you might be affected by the CVE-2023-20883 vulnerability, which can lead to denial-of-service (DoS) attacks when used with a reverse proxy cache. You're at risk if you're running Spring Boot versions 3.0.0 - 3.0.6, 2.7.0 - 2.7.11, 2.6.0 - 2.6.14, 2.5.0 - 2.5.14, or older unsupported versions. To check if you're affected, verify your Spring Boot version and see if it falls within these ranges.

What should I do if I'm affected?

If you're affected by the CVE-2023-20883 vulnerability, upgrade your Spring Boot version to a secure one: 3.0.7+ for 3.0.x users, 2.7.12+ for 2.7.x users, 2.6.15+ for 2.6.x users, or 2.5.15+ for 2.5.x users. As a workaround, configure your reverse proxy not to cache 404 responses or responses to requests at the root of your application.

Is this in CISA’s Known Exploited Vulnerabilities Catalog?

The CVE-2023-20883 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This high-severity issue, affecting certain Spring Boot versions, can lead to denial-of-service attacks when used with a reverse proxy cache. To address this vulnerability, users should upgrade to a secure version of Spring Boot and follow recommended mitigation strategies.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized as CWE-400 involves uncontrolled resource consumption, potentially causing denial-of-service attacks in affected Spring Boot versions.

For more details

CVE-2023-20883 is a significant vulnerability affecting certain Spring Boot versions, with potential denial-of-service consequences. For a comprehensive understanding of this vulnerability, including its description, severity, technical details, and known affected software configurations, refer to the NVD or the resources listed below.

• NetApp Product Security

• Broadcom