CVE-2023-25574
LTI JupyterHub Authenticator does not properly validate JWT Signature
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.
How to fix CVE-2023-25574
To remediate CVE-2023-25574, upgrade the affected package to a fixed version below.
- —upgrade to 1.4.0 or later
- —no fix listed
Is CVE-2023-25574 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- >= 1.3.0, < 1.4.0
- from 0, <= 1.3.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL10.0 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
References (6)
- ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-25574
- PATCHgithub.com/jupyterhub/ltiauthenticator
- WEBgithub.com/jupyterhub/ltiauthenticator/blob/3feec2e81b9d3b0ad6b58ab4226af640833039f3/ltiauthenticator/lti13/validator.py#L122-L164
- WEBgithub.com/jupyterhub/ltiauthenticator/blob/main/CHANGELOG.md#140---2023-03-01