Spring Core - Remote Code Execution (Spring4Shell - CVE-2022-22965) (CVE-2022-22965)

Spring Core is affected by a Remote Code Execution,located on the web application deployed as a WAR. The root cause of this vulnerability is the insecure access to ClassLoader in Java 9+ which is used in Spring Framework and can be used for uploading a malicious webshell. Spring Framework is affected in versions below 5.2.20 or in version 5.3.18 and Spring Boot is affected in versions lower than 2.6.6.

The risk exists that a remote unauthenticated attacker can fully compromise the server in order to steal confidential information, install ransomware, or pivot to the internal network.

Sniper can gain unauthenticated Remote Code Execution on the target system and extract multiple artefacts as evidence.

Upgrade the Spring Framwork or Spring Boot to the newest version and check the newest Java security fix for versions higher or equal with 9.

https://jfrog.com/blog/springshell-zero-day-vulnerability-all-you-need-to-know

https://www.lunasec.io/docs/blog/spring-rce-vulnerabilities/

https://nvd.nist.gov/vuln/detail/CVE-2022-22965