Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a vulnerability in the OpenAM access management solution that could allow an attacker to improperly redeem authorization codes. While the default configuration requires specific settings to be enabled for exploitation, the core issue lies in how authorization codes are handled, potentially impacting public client applications. The primary concern is confirming relevance and exposure.
- Authorization codes can be misused.
- Important for access control system security.
- Verify if this system is in use.
Attack Path
How an attacker could exploit the issue
An attacker could compromise an OpenAM access management system by intercepting a partially protected authorization code. If the system is not configured to strictly enforce verification, an attacker can then use this intercepted code to gain unauthorized access.
- Attacker needs network access.
- Intercepted authorization code.
- Unauthorized access to protected resources.
Live Threat
Current exploitation, exposure, and threat context
When supported by the advisory, an attacker could redeem intercepted authorization codes without a valid proof-of-possession. This could occur when the OpenAM realm-wide setting for code verifier enforcement is disabled, even if the authorization code includes a code challenge. Public clients are directly affected, and confidential clients may require additional credentials or context for exploitation.
- Authorization codes.
- Intercepted codes without proper verification.
- Unauthorized access to services.
Operational Fix
Recommended remediation, mitigation, and detection steps
Security and platform teams are likely responsible for OpenAM, an access management solution. The first practical step is to identify all OpenAM deployments, confirm their exposure and criticality, and then assign ownership for remediation.
- Platform or Security teams own the issue.
- Verify OpenAM deployment exposure and criticality.
- Plan remediation based on identified risk.
