CVE-2023-20861 is a medium-severity vulnerability affecting the Spring Framework, a popular application framework for enterprise Java. This vulnerability can cause a denial-of-service (DoS) condition when a user provides a specially crafted SpEL expression. Systems running Spring Framework versions 6.0.0 - 6.0.6, 5.3.0 - 5.3.25, 5.2.0.RELEASE - 5.2.22.RELEASE, and older unsupported versions are affected. To mitigate this issue, users should upgrade to the appropriate fixed versions.

How do I know if I'm affected?

If you're using the Spring Framework, you might be affected by the vulnerability. This issue can cause a denial-of-service (DoS) condition and impacts versions 6.0.0 to 6.0.6, 5.3.0 to 5.3.25, 5.2.0.RELEASE to 5.2.22.RELEASE, and older unsupported versions. To check if you're affected, verify which version of the Spring Framework you're using and compare it to the affected versions listed.

What should I do if I'm affected?

If you're affected by the vulnerability, take these steps to mitigate the issue. Identify your Spring Framework version. Upgrade to a fixed version (6.0.7+ for 6.0.x users, 5.3.26+ for 5.3.x users, 5.2.23.RELEASE+ for 5.2.x users, or 6.0.7+ or 5.3.26+ for older, unsupported versions).

Is CVE-2023-20861 in CISA’s Known Exploited Vulnerabilities Catalog?

The CVE-2023-20861 vulnerability is not listed in CISA's Known Exploited Vulnerabilities Catalog. This security issue in the Spring Framework can cause a denial-of-service (DoS) condition when a user provides a specially crafted expression. To protect against this vulnerability, users should update their software to the latest fixed versions.

Weakness enumeration

The weakness enumeration for this vulnerability is categorized as NVD-CWE-noinfo, which involves a denial-of-service (DoS) issue in the Spring Framework, that affects certain versions and products.

For more details

CVE-2023-20861 is a medium-severity vulnerability in the Spring Framework that can lead to a denial-of-service (DoS) condition. For a comprehensive understanding of this vulnerability, including its description, severity, technical details, and known affected software configurations, refer to the NVD page or the resources listed below.

• NetApp Security Advisory

• Spring Framework Security Advisory