CVE-2021-21335

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Source

https://cve.org/CVERecord?id=CVE-2021-21335

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21335.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2021-21335

Aliases

GHSA-ww8q-72rx-hc54

Published

2021-03-08T21:15:16.573Z

Modified

2026-07-09T10:52:09.644765Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

In the SPNEGO HTTP Authentication Module for nginx (spnego-http-auth-nginx-module) before version 1.1.1 basic Authentication can be bypassed using a malformed username. This affects users of spnego-http-auth-nginx-module that have enabled basic authentication. This is fixed in version 1.1.1 of spnego-http-auth-nginx-module. As a workaround, one may disable basic authentication.

References

Affected packages

Git / github.com/stnoonan/spnego-http-auth-nginx-module

Affected ranges

Type

GIT

Repo

https://github.com/stnoonan/spnego-http-auth-nginx-module

Events

Introduced

Fixed

a06f9efca373e25328b1c53639a48decd0854570

Database specific

Show details

{
    "cpe": "cpe:2.3:a:spnego_http_authentication_module_project:spnego_http_authentication_module:*:*:*:*:*:nginx:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.1.1"
        }
    ]
}

Affected versions

v1.*

v1.0.0

v1.1.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21335.json"

vanir_signatures

[
    {
        "id": "CVE-2021-21335-96db8614",
        "source": "https://github.com/stnoonan/spnego-http-auth-nginx-module/commit/a06f9efca373e25328b1c53639a48decd0854570",
        "signature_type": "Function",
        "target": {
            "function": "ngx_http_auth_spnego_handler",
            "file": "ngx_http_auth_spnego_module.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "function_hash": "72009278362700319588796017657292650017",
            "length": 3010.0
        }
    },
    {
        "id": "CVE-2021-21335-e3d42e4c",
        "source": "https://github.com/stnoonan/spnego-http-auth-nginx-module/commit/a06f9efca373e25328b1c53639a48decd0854570",
        "signature_type": "Line",
        "target": {
            "file": "ngx_http_auth_spnego_module.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "line_hashes": [
                "184303827427714694529644895348184658594",
                "339901842394811731769551324700142596822",
                "77201998263918464123882835720729499067",
                "319109234672289250995724412850191116713"
            ],
            "threshold": 0.9
        }
    }
]

vanir_signatures_modified

"2026-07-09T10:52:09Z"