Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability impacts Apache Juneau's REST server logging, potentially exposing sensitive request headers like authorization and cookies in plain text when server errors occur. The primary concern is to confirm if this logging functionality is active and if clients can trigger server errors, leading to the disclosure of credentials or session information in logs.
- Sensitive headers can be logged.
- Log access could reveal credentials.
- Confirm relevance and exposure.
Attack Path
How an attacker could exploit the issue
An attacker can trigger this vulnerability by sending requests to the REST server that result in an error. When an error occurs, sensitive information from request headers, such as authentication tokens, are logged in plain text. This exposes sensitive data to anyone who can access the application logs.
- No specific access or privileges required.
- Causing a server error triggers logging.
- Exposes sensitive headers in logs.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could expose sensitive client request headers to unauthorized log file readers. When a server error occurs, Apache Juneau's default logger records headers like Authorization, Cookie, Proxy-Authorization, and X-API-Key in cleartext. This exposure is possible when a client can trigger a server error and then gain access to the application logs.
- Client authentication or session tokens at risk.
- Triggering server errors and reading log files.
- Unauthorized access to user sessions or API keys.
Operational Fix
Recommended remediation, mitigation, and detection steps
The Apache Juneau REST server's default logger can expose sensitive request headers like `Authorization` and `Cookie` to unauthorized parties when errors occur. Application owners and infrastructure teams are likely responsible for remediation. The first practical step involves identifying all instances of the affected technology, confirming their exposure and criticality, and then assigning ownership to plan the most appropriate response.
- Application owners should prioritize remediation.
- Verify log file accessibility and error conditions.
- Plan for vendor coordination and log redaction.
