Medium · published June 12, 2019
⚠️ A sneaky logging oversight is exposing plain text credentials in your Undertow web server! This vulnerability could lead to sensitive data leaks if you're using versions prior to 2.0.21. 🔥 Think of your server as a busy restaurant kitchen where the chefs are jotting down secret recipes on post-it notes — if those notes end up in the trash, any curious diner could read them! That's similar to how these credentials are being logged in plain text and could easily be discovered. An attacker could potentially access sensitive credentials if they gain access to the log files, leading to unauthorized access or data breaches. While the impact isn't catastrophic, it's certainly a recipe for disaster if someone exploits this vulnerability.
Think of your server as a busy restaurant kitchen where the chefs are jotting down secret recipes on post-it notes — if those notes end up in the trash, any curious diner could read them! That's similar to how these credentials are being logged in plain text and could easily be discovered. This information exposure occurs because the Undertow web server logs the HttpServerExchange object at ERROR level using the UndertowLogger. Consequently, plain text credentials may end up in log files, allowing unauthorized access if those logs are accessed by malicious users.
An attacker could potentially access sensitive credentials if they gain access to the log files, leading to unauthorized access or data breaches. While the impact isn't catastrophic, it's certainly a recipe for disaster if someone exploits this vulnerability. To remedy this vulnerability, ensure you upgrade your Undertow web server to version 2.0.21 or higher. Additionally, review your logging configuration to prevent logging sensitive information in plain text. Regularly audit your logs to identify any potential exposures. You've got this! With these steps, you can secure your server and protect your sensitive data. 🛡️