GitHub Advisoryadvisory · PyPI
GHSA-mcgx-2gcr-p3hp LTI JupyterHub Authenticator does not properly validate JWT Signature
CRITICAL
Official page ↗
- Aliases
- CVE-2023-25574
- Ecosystem
- PyPI
- Packages
- jupyterhub-ltiauthenticator
- Severity
- Critical
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-347
- Reviewed
- 2025-02-25
Affected packages
• PyPI jupyterhub-ltiauthenticator: >= 1.3.0, < 1.4.0 → fixed in 1.4.0
Description
Impact
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.
Patches
None.
Workarounds
None.
References
• This code segment didn't validate a JWT signature.
Related
Alias · CVE (1)
- CVE-2023-25574 `jupyterhub-ltiauthenticator` is a JupyterHub authenticator for learning tools interoperability (LTI). vulnerability
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness
References
- https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-mcgx-2gcr-p3hp web
- https://nvd.nist.gov/vuln/detail/CVE-2023-25574 advisory
- https://github.com/jupyterhub/ltiauthenticator package
- https://github.com/jupyterhub/ltiauthenticator/blob/3feec2e81b9d3b0ad6b58ab4226af640833039f3/ltiauthenticator/lti13/validator.py#L122-L164 web
- https://github.com/jupyterhub/ltiauthenticator/blob/main/CHANGELOG.md#140---2023-03-01 web
- https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-ltiauthenticator/PYSEC-2025-120.yaml web