A vulnerability in Node.js has been identified, allowing for a Denial of Service (DoS) attack through resource exhaustion when using the fetch() function to retrieve content from an untrusted URL. The vulnerability stems from the fact that the fetch() function in Node.js always decodes Brotli, making it possible for an attacker to cause resource exhaustion when fetching content from an untrusted URL. An attacker controlling the URL passed into fetch() can exploit this vulnerability to exhaust memory, potentially leading to process termination, depending on the system configuration. A flaw was found in Node.js that allows a denial of service attack through resource exhaustion when using the fetch() function to retrieve content from an untrusted URL. The vulnerability stems from the fetch() function in Node.js that always decodes Brotli, making it possible for an attacker to cause resource exhaustion when fetching content from an untrusted URL. This flaw allows an attacker to control the URL passed into fetch() to exhaust memory, potentially leading to process termination, depending on the system configuration.
With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.
– Scott Cheney, Manager of Information Security, Sierra View Medical Center