CVEs-PoC/2020/CVE-2020-5407.md

### [CVE-2020-5407](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-5407)
![](https://img.shields.io/static/v1?label=Product&message=Spring%20Security&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=5.25.2.4%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=CWE-347%3A%20Improper%20Verification%20of%20Cryptographic%20Signature&color=brighgreen)

### Description

Spring Security versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 contain a signature wrapping vulnerability during SAML response validation. When using the spring-security-saml2-service-provider component, a malicious user can carefully modify an otherwise valid SAML response and append an arbitrary assertion that Spring Security will accept as valid.

### POC

#### Reference
- https://www.oracle.com/security-alerts/cpuApr2021.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpuoct2020.html

#### Github
No PoCs found on GitHub currently.