Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability was discovered in an authentication component that could allow unauthorized access to user sessions, bypassing security policies intended to enforce re-authentication. This issue affects systems relying on specific identity protocols for user login and session management. The primary concern is to confirm if our organization utilizes this affected technology and if it is exposed in a manner that could be exploited.
- Authentication bypass in session management.
- Bypasses re-authentication policies.
- Confirm relevance and potential exposure.
Attack Path
How an attacker could exploit the issue
An attacker could bypass re-authentication requirements by exploiting a flaw in how a web application checks the age of user sessions. This occurs because a security setting meant to enforce regular logins was not functioning correctly. If an attacker can interact with a vulnerable application, they could potentially gain unauthorized access to user accounts by tricking the system into accepting outdated session information.
- Publicly accessible web application.
- Malicious request bypasses session age check.
- Unauthorized access to user accounts.
Live Threat
Current exploitation, exposure, and threat context
When supported by the advisory, this vulnerability could allow unauthenticated users to bypass step-up authentication policies by accepting sessions of any age, potentially impacting the integrity of authentication processes.
- Authentication session integrity.
- Re-authentication checks could be bypassed.
- Compromised authentication integrity.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability impacts the authentication-freshness check in OidcClientCodeRequestFilter, potentially allowing unauthenticated or aged sessions to be accepted. Owners of applications utilizing this OIDC client component should prioritize identifying all deployments, assessing their exposure and criticality, and coordinating with the responsible teams for remediation planning. This may involve collaboration between application owners, platform teams, and potentially vendor management if the component is part of a third-party solution. The immediate first step is to locate all instances, confirm reachability and business criticality, and assign an owner for managing the remediation process.
- Application and platform teams own remediation.
- Verify OIDC client reachability and criticality.
- Plan remediation based on identified risk.
