Suricata before 4.0.4 is prone to an HTTP detection bypass vulnerability in detect.c and stream-tcp.c. If a malicious server breaks a normal TCP flow and sends data before the 3-way handshake is complete, then the data sent by the malicious server will be accepted by web clients such as a web browser or Linux CLI utilities, but ignored by Suricata IDS signatures. This mostly affects IDS signatures for the HTTP protocol and TCP stream content; signatures for TCP packets will inspect such network traffic as usual.
The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Suricata | Suricata-ids | * | 4.0.4 (excluding) |