by Kastro
Paper/Archive/CVE-2023-25574

CVE-2023-25574

jupyterhub ltiauthenticator — JupyterHub's LTI13Authenticator: JWT signature not validated

EPSS 0.4%CVSS 10.0
critical.is priorityof 100
36
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 29.3.293 × 205.9No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

`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.

Affected

ProductAffectedFixed inSource
ltiauthenticator= 1.3.0–CNA

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/jupyterhub/ltiauthenticator/security/advisories/GHSA-mcgx-2gcr-p3hprefgithub.com/jupyterhub/ltiauthenticator/blob/3feec2e81b9d3b0ad6b58ab4226af640833039f3/ltiauthenticator/lti13/validator.py#L122-L164refgithub.com/jupyterhub/ltiauthenticator/blob/main/CHANGELOG.md#140---2023-03-01