CVE-2020-5407: Signature Wrapping Vulnerability with spring-security-saml2-service-provider
Medium
Spring by VMware
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.
Severity is medium unless otherwise noted.
-
Spring Security
- 5.2.x prior to 5.2.4
- 5.3.x prior to 5.3.2
Users of affected versions should apply the following mitigation or upgrade. Releases that have fixed this issue include:
-
Spring Security
- 5.2.4
- 5.3.2
This issue was identified and responsibly reported by Sam Tinklenberg.
- https://github.com/spring-projects/spring-security/tree/5.2.3.RELEASE/samples/boot/saml2login
- https://docs.spring.io/spring-security/site/docs/5.2.3.RELEASE/reference/html5/#saml2
2020-05-07: Initial vulnerability report published.