🔒SAML: 20 Years of Complexity and Security Struggles
SAML's 20-year-old security flaws are catching up
TL;DR
SAML, born in 2002, is facing major security challenges due to its XML foundation. Modern attacks exploit parser bugs, making it a risky choice for new projects.
SAML, the Security Assertion Markup Language, turned 20 this year, but its security issues are just now coming to light. Born in 2002, SAML was designed to simplify web authentication, but its reliance on XML has led to significant security vulnerabilities. Modern attacks often exploit parser differential and round-trip bugs, making SAML a risky choice for new projects. The protocol's complexity and lack of a solid security track record mean developers should be wary of using SAML in new projects. SAML's XML foundation is at odds with security best practices, and its legacy status is a liability in today's threat landscape.
Key Points
SAML was created in 2002 by OASIS SSTC, aiming to simplify web authentication.
XML signature wrapping (XSW) attacks are a major issue with SAML's XML foundation.
Canonicalization bugs, like Kelby's XML comment bypass in 2018, highlight SAML's security flaws.
Modern SAML attacks often exploit parser differential and round-trip bugs, making it risky.
Developers should consider alternatives to SAML due to its complex and insecure XML foundation.
Why It Matters
If you're still using SAML for authentication, it's time to reassess. SAML's 20-year-old security flaws are becoming a liability. Modern alternatives like OAuth and OpenID Connect offer better security and are more aligned with current web standards. Teams relying on SAML should consider migrating to more secure protocols to protect against emerging threats.
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