{
"id": "GHSA-5xvc-vgmp-jgc3",
"aliases": [
"CVE-2021-41194"
],
"details": "### Impact\n\nWhen JupyterHub is used with FirstUseAuthenticator, the vulnerability allows unauthorized access to any user's account if `create_users=True` and the username is known or guessed.\n\n### Patches\n\nUpgrade to jupyterhub-firstuseauthenticator to 1.0, or apply patch https://github.com/jupyterhub/firstuseauthenticator/pull/38.patch\n\n### Workarounds\n\nIf you cannot upgrade, there is no complete workaround, but it can be mitigated.\n\nIf you cannot upgrade yet, you can disable user creation with `c.FirstUseAuthenticator.create_users = False`, which will only allow login with fully normalized usernames for already existing users prior to jupyterhub-firstuserauthenticator 1.0. If any users have never logged in with their normalized username (i.e. lowercase), they will still be vulnerable until you can patch or upgrade.",
"summary": "Improper Access Control in jupyterhub-firstuseauthenticator",
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.0"
}
]
}
],
"package": {
"name": "jupyterhub-firstuseauthenticator",
"ecosystem": "PyPI"
}
}
],
"modified": "2024-09-24T21:11:48Z",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"
},
{
"type": "CVSS_V4",
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
}
],
"published": "2021-10-28T23:13:57Z",
"references": [
{
"url": "https://github.com/jupyterhub/firstuseauthenticator/security/advisories/GHSA-5xvc-vgmp-jgc3",
"type": "WEB"
},
{
"url": "https://nvd.nist.gov/vuln/detail/CVE-2021-41194",
"type": "ADVISORY"
},
{
"url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38",
"type": "WEB"
},
{
"url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38.patch",
"type": "WEB"
},
{
"url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38/commits/32b21898fb2b53b1a2e36270de6854ad70e9e9bf",
"type": "WEB"
},
{
"url": "https://github.com/jupyterhub/firstuseauthenticator/pull/38/commits/9e200d974e0cb85d828a6afedb8ab90a37878f28",
"type": "WEB"
},
{
"url": "https://github.com/jupyterhub/firstuseauthenticator/commit/953418e2450dbc2d854e332350849533b0ebc7ba",
"type": "WEB"
},
{
"url": "https://github.com/jupyterhub/firstuseauthenticator",
"type": "PACKAGE"
},
{
"url": "https://github.com/pypa/advisory-database/tree/main/vulns/jupyterhub-firstuseauthenticator/PYSEC-2021-384.yaml",
"type": "WEB"
}
],
"schema_version": "1.4.0",
"database_specific": {
"cwe_ids": [
"CWE-284"
],
"severity": "CRITICAL",
"github_reviewed": true,
"nvd_published_at": "2021-10-28T20:15:00Z",
"github_reviewed_at": "2021-10-28T16:52:16Z"
}
}