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3:25pm, 1 April 2022

TLP Rating: White

Active exploitation of RCE in Java’s Spring Framework

Updated: 2:30pm, 1 April 2021 to provide the latest information on version upgrades and new vulnerability information

There are two critical RCE vulnerabilities in Java’s Spring Framework.

  • A new critical Remote Code Execution (RCE) vulnerability (CVE-2022-22963) was discovered in Java’s Spring Cloud Functions. There are patches available for this vulnerability which should be applied to affected systems as soon as possible.
  • A vulnerability (CVE-2022-22965) in Spring Core that could lead to unauthenticated RCE, has also been discovered. It has been titled by some researchers as “Spring4Shell” or “SpringShell”.

There are reports of proof-of-concept code and active exploitation for both vulnerabilities.

What to look for

How to tell if you're at risk

For CVE-2022-22963, you’re at risk if you are using Spring Cloud versions earlier than:

  • 3.1.7
  • 3.2.3

For CVE-2022-22965, Spring4Shell, you’re at risk if you are using Spring Core:

  • With Spring Framework version 5.3.0 to 5.3.17
  • With Spring Framework version 5.2.0 to 5.2.19
  • With older Spring Framework version

For Spring4Shell vulnerability, you’re at risk if you are using:

  • JDK9 and above
  • Spring-Beans package
  • Spring parameter binding
  • Spring parameter binding that uses non-basic parameter types, such as general POJOs

For Spring4Shell you can check if you vulnerable using the Vulnerability scanner External Link

What to do

Prevention

For CVE-2022-22963 upgrade to Spring Cloud Function version:

  • 3.1.7 (or higher)
  • 3.2.3 (or higher)

For CVE-2022-22965 upgrade to Spring Core with Framework version:

  • 3.18 (or higher)
  • 2.19 (or higher)

Mitigation

For Spring4Shell vulnerability:

More information

Monitor latest updates for further mitigation measures:

Official post from Spring: Spring Framework RCE, Early Announcement External Link

Cyber Kendra's blog post for Spring4Shell External Link

If you require more information or further support, submit a report on our website or contact us on 0800 CERTNZ.

Report an incident to CERT NZ External Link