ubuntu-cve-2025-31492
Vulnerability from osv_ubuntu
Published
2025-04-06 20:15
Modified
2026-01-20 05:27
Summary
Details
mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.16.11, a bug in a mod_auth_openidc results in disclosure of protected content to unauthenticated users. The conditions for disclosure are an OIDCProviderAuthRequestMethod POST, a valid account, and there mustn't be any application-level gateway (or load balancer etc) protecting the server. When you request a protected resource, the response includes the HTTP status, the HTTP headers, the intended response (the self-submitting form), and the protected resource (with no headers). This is an example of a request for a protected resource, including all the data returned. In the case where mod_auth_openidc returns a form, it has to return OK from check_userid so as not to go down the error path in httpd. This means httpd will try to issue the protected resource. oidc_content_handler is called early, which has the opportunity to prevent the normal output being issued by httpd. oidc_content_handler has a number of checks for when it intervenes, but it doesn't check for this case, so the handler returns DECLINED. Consequently, httpd appends the protected content to the response. The issue has been patched in mod_auth_openidc versions >= 2.4.16.11.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libapache2-mod-auth-openidc",
"binary_version": "2.3.3-1build1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "libapache2-mod-auth-openidc",
"purl": "pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.3.3-1build1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.1.6-1",
"2.3.1-2",
"2.3.2-1",
"2.3.2-1build1",
"2.3.3-1build1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libapache2-mod-auth-openidc",
"binary_version": "2.4.1-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libapache2-mod-auth-openidc",
"purl": "pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.4.1-1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.10.2-1",
"2.4.0.4-1",
"2.4.1-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libapache2-mod-auth-openidc",
"binary_version": "2.4.11-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "libapache2-mod-auth-openidc",
"purl": "pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.4.11-1ubuntu0.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.11-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.9-1",
"2.4.9.4-1",
"2.4.10-1",
"2.4.10-1build1",
"2.4.11-1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libapache2-mod-auth-openidc",
"binary_version": "2.4.15.1-1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "libapache2-mod-auth-openidc",
"purl": "pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.4.15.1-1ubuntu0.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.4.15.1-1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.14.2-1",
"2.4.14.4-2",
"2.4.14.4-2build1",
"2.4.15.1-1",
"2.4.15.1-1build2",
"2.4.15.1-1build3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libapache2-mod-auth-openidc",
"binary_version": "2.4.17-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "libapache2-mod-auth-openidc",
"purl": "pkg:deb/ubuntu/libapache2-mod-auth-openidc@2.4.17-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.4.16.10-1",
"2.4.17-1"
]
}
],
"aliases": [],
"details": "mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.16.11, a bug in a mod_auth_openidc results in disclosure of protected content to unauthenticated users. The conditions for disclosure are an OIDCProviderAuthRequestMethod POST, a valid account, and there mustn\u0027t be any application-level gateway (or load balancer etc) protecting the server. When you request a protected resource, the response includes the HTTP status, the HTTP headers, the intended response (the self-submitting form), and the protected resource (with no headers). This is an example of a request for a protected resource, including all the data returned. In the case where mod_auth_openidc returns a form, it has to return OK from check_userid so as not to go down the error path in httpd. This means httpd will try to issue the protected resource. oidc_content_handler is called early, which has the opportunity to prevent the normal output being issued by httpd. oidc_content_handler has a number of checks for when it intervenes, but it doesn\u0027t check for this case, so the handler returns DECLINED. Consequently, httpd appends the protected content to the response. The issue has been patched in mod_auth_openidc versions \u003e= 2.4.16.11.",
"id": "UBUNTU-CVE-2025-31492",
"modified": "2026-01-20T05:27:25Z",
"published": "2025-04-06T20:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2025-31492"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-31492"
},
{
"type": "REPORT",
"url": "https://github.com/OpenIDC/mod_auth_openidc/commit/b59b8ad63411857090ba1088e23fe414c690c127"
},
{
"type": "REPORT",
"url": "https://github.com/OpenIDC/mod_auth_openidc/security/advisories/GHSA-59jp-rwph-878r"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-7446-1"
}
],
"related": [
"USN-7446-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2025-31492"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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