The Spring4Shell vulnerability: Overview, detection, and remediation

On March 29, 2022, a critical vulnerability targeting the Spring Java framework was disclosed. This vulnerability was initially confused with a vulnerability in Spring Cloud, CVE-2022-22963. However, it was later identified as a separate vulnerability inside Spring Core, now tracked as CVE-2022-22965 and canonically named Spring4Shell.

This vulnerability affects Spring Core and allows an attacker to send a specially crafted HTTP request to bypass protections in the library's HTTP request parser, leading to remote code execution. Several proofs of …

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