CVE-2023-25574

JupyterHub's LTI13Authenticator: JWT signature not validated

Description

`jupyterhub-ltiauthenticator` is a JupyterHub authenticator for learning tools interoperability (LTI). 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. Only users that has configured a JupyterHub installation to use the authenticator class `LTI13Authenticator` are affected. `jupyterhub-ltiauthenticator` version 1.4.0 removes LTI13Authenticator to address the issue. No known workarounds are available.

Category

10.0
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.04%
Affected: jupyterhub ltiauthenticator
Published at:
Updated at:

References

Link Tags
https://github.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-mcgx-2gcr-p3hp
https://github.com/jupyterhub/ltiauthenticator/blob/3feec2e81b9d3b0ad6b58ab4226af640833039f3/ltiauthenticator/lti13/validator.py#L122-L164
https://github.com/jupyterhub/ltiauthenticator/blob/main/CHANGELOG.md#140---2023-03-01

Frequently Asked Questions

What is the severity of CVE-2023-25574?
CVE-2023-25574 has been scored as a critical severity vulnerability.
How to fix CVE-2023-25574?
To fix CVE-2023-25574, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-25574 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-25574 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-25574?
CVE-2023-25574 affects jupyterhub ltiauthenticator.
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