Critical · published January 30, 2020
⚠️ An HTTP header missing a colon can lead to some bizarre misinterpretations! It's like a chef misinterpreting an order with the wrong punctuation — things can get messy in the kitchen! Imagine a restaurant where the kitchen staff is receiving orders but sometimes they come in without proper formatting, leading to confusion about what to serve. An HTTP header without a colon is just like that — it could be seen as an entirely different request or just plain wrong, potentially causing chaos in data processing. If exploited, this peculiar flaw could lead to unexpected behavior in your application, like serving up the wrong dish to your customers. While it’s not currently known to be exploited, the unpredictability of incorrect header formatting could spell trouble for application stability and reliability.
Imagine a restaurant where the kitchen staff is receiving orders but sometimes they come in without proper formatting, leading to confusion about what to serve. An HTTP header without a colon is just like that — it could be seen as an entirely different request or just plain wrong, potentially causing chaos in data processing. This vulnerability in Netty’s HttpObjectDecoder.java allows HTTP headers without a colon to be interpreted incorrectly, possibly as separate headers or even as invalid folds, leading to erratic application behavior.
If exploited, this peculiar flaw could lead to unexpected behavior in your application, like serving up the wrong dish to your customers. While it’s not currently known to be exploited, the unpredictability of incorrect header formatting could spell trouble for application stability and reliability. To safeguard against this quirk, ensure you update to Netty version 4.1.44 or later. Additionally, implement input validation to catch improperly formatted headers before they reach your application. Better safe than sorry! You've got this! Stay vigilant, patch those systems, and keep serving up secure applications! 🛡️
| Product | Versions | Fixed in |
|---|---|---|
| netty/netty | < 4.1.44 | 4.1.44 |
| debian/debian_linux | all versions | — |
| debian/debian_linux | all versions | — |
| debian/debian_linux | all versions | — |
| fedoraproject/fedora | all versions | — |
| canonical/ubuntu_linux | all versions | — |
| redhat/jboss_amq_clients | all versions | — |
| redhat/jboss_enterprise_application_platform | all versions | — |
| redhat/jboss_enterprise_application_platform | all versions | — |