CVE-2020-5407: Signature Wrapping Vulnerability with spring-security-saml2-service-provider
Severity
Medium
Vendor
Spring by VMware
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.
Affected Pivotal Products and Versions
Severity is medium unless otherwise noted.
-
Spring Security
- 5.2.x prior to 5.2.4
- 5.3.x prior to 5.3.2
Mitigation
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
Credit
This issue was identified and responsibly reported by Sam Tinklenberg.
References
- 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
History
2020-05-07: Initial vulnerability report published.