CVE-2021-39191

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Source
https://cve.org/CVERecord?id=CVE-2021-39191
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-39191.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-39191
Downstream
Related
Published
2021-09-03T14:15:07.210Z
Modified
2026-04-11T23:14:35.494587Z
Severity
  • 6.1 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CVSS Calculator
Summary
[none]
Details

modauthopenidc is an authentication/authorization module for the Apache 2.x HTTP server that functions as an OpenID Connect Relying Party, authenticating users against an OpenID Connect Provider. In versions prior to 2.4.9.4, the 3rd-party init SSO functionality of modauthopenidc was reported to be vulnerable to an open redirect attack by supplying a crafted URL in the target_link_uri parameter. A patch in version 2.4.9.4 made it so that the OIDCRedirectURLsAllowed setting must be applied to the target_link_uri parameter. There are no known workarounds aside from upgrading to a patched version.

Database specific 
{
    "unresolved_ranges": [
        {
            "cpe": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*",
            "extracted_events": [
                {
                    "last_affected": "10.0"
                }
            ],
            "source": "CPE_FIELD"
        },
        {
            "cpe": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
            "extracted_events": [
                {
                    "last_affected": "35"
                }
            ],
            "source": "CPE_FIELD"
        },
        {
            "cpe": "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*",
            "extracted_events": [
                {
                    "last_affected": "36"
                }
            ],
            "source": "CPE_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/openidc/mod_auth_openidc

Affected ranges

Type
GIT
Repo
https://github.com/openidc/mod_auth_openidc
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d
Database specific 
{
    "cpe": "cpe:2.3:a:openidc:mod_auth_openidc:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.4.9.4"
        }
    ],
    "source": [
        "CPE_FIELD",
        "REFERENCES"
    ]
}

Affected versions

2.*
2.3.11rc1
v1.*
v1.5
v1.5.1
v1.5.2
v1.5.3
v1.5.4
v1.5.5
v1.6.0
v1.7.0
v1.8.0
v1.8.1
v1.8.10
v1.8.2
v1.8.3
v1.8.4
v1.8.5
v1.8.6
v1.8.7
v1.8.8
v1.8.9
v2.*
v2.0.0
v2.0.0rc1
v2.0.0rc4
v2.1.0
v2.1.1
v2.1.2
v2.1.3
v2.1.4
v2.1.5
v2.1.6
v2.2.0
v2.3.0
v2.3.0rc0
v2.3.0rc3
v2.3.1
v2.3.10
v2.3.10.1
v2.3.10.2
v2.3.11
v2.3.2
v2.3.3
v2.3.4
v2.3.5
v2.3.6
v2.3.7
v2.3.8
v2.3.9
v2.4.0
v2.4.0.1
v2.4.0.2
v2.4.0.3
v2.4.0.4
v2.4.1
v2.4.2
v2.4.2.1
v2.4.3
v2.4.4
v2.4.4.1
v2.4.5
v2.4.6
v2.4.7
v2.4.7.1
v2.4.7.2
v2.4.8.1
v2.4.8.2
v2.4.8.3
v2.4.8.4
v2.4.9
v2.4.9.1
v2.4.9.2
v2.4.9.3

Database specific

vanir_signatures_modified 
"2026-04-11T23:14:35Z"
vanir_signatures 
[
    {
        "signature_version": "v1",
        "digest": {
            "function_hash": "255789951588007788344141961223198622431",
            "length": 3326.0
        },
        "id": "CVE-2021-39191-1d53a487",
        "signature_type": "Function",
        "target": {
            "file": "src/mod_auth_openidc.c",
            "function": "oidc_handle_discovery_response"
        },
        "source": "https://github.com/openidc/mod_auth_openidc/commit/03e6bfb446f4e3f27c003d30d6a433e5dd8e2b3d",
        "deprecated": false
    }
]
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-39191.json"