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Advisories

JupyterHub through 6.0.1 OAuth Client ID Collision via Unescaped Hyphen

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severity
low
date
Affecting

  • jupyterhub <= 6.0.1

CWE
  • CWE-694 Use of Multiple Resources with Duplicate Identifier
CVSS
2.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Credit
HaiND from the Post and Telecommunication Institute of Technology
Description
JupyterHub through 6.0.1 contains an identifier collision vulnerability that allows authenticated users to overwrite another user's named-server OAuth client by registering a hyphenated username. Attackers holding a name like alice-prod can overwrite the client for alice's server prod, breaking OAuth login and revoking tokens by stopping their own server.

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