CVE-2023-25574: LTI JupyterHub Authenticator does not properly validate JWT Signature
Only users that has configured a JupyterHub installation to use the authenticator class LTI13Authenticator are influenced.
LTI13Authenticator that was introduced in jupyterhub-ltiauthenticator 1.3.0 wasn’t validating JWT signatures. This is believed to allow the LTI13Authenticator to authorize a forged request granting access to existing and new user identities.
References
- github.com/advisories/GHSA-mcgx-2gcr-p3hp
- github.com/jupyterhub/ltiauthenticator
- github.com/jupyterhub/ltiauthenticator/blob/3feec2e81b9d3b0ad6b58ab4226af640833039f3/ltiauthenticator/lti13/validator.py
- github.com/jupyterhub/ltiauthenticator/blob/main/CHANGELOG.md
- github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-mcgx-2gcr-p3hp
- nvd.nist.gov/vuln/detail/CVE-2023-25574
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