Bug #3522: TCP Fast Open - Bypass of stateless alerts - Suricata - Open Information Security Foundation

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Bug #3522

closed

TCP Fast Open - Bypass of stateless alerts

Added by Guillermo Muñoz over 4 years ago. Updated over 4 years ago.

Status:

Closed

Priority:

Normal

Assignee:

Victor Julien

Target version:

6.0.0beta1

Affected Versions:

5.0.2

Effort:

medium

Difficulty:

Label:

Needs backport

Description

I have successfully verified that Suricata on latest release version v5.0.2 doesn't detect payloads using TFO (TCP Fast Open). Attached is a .pcap file with a directory path traversal payload which reads an /etc/passwd file, suricata rule to trigger alerts on packets which contain /etc/passwd payload so as the suricata.yaml configuration file.

suricata -V
This is Suricata version 5.0.2 RELEASE

suricata -c /etc/suricata/suricata.yaml -r tfo.pcap

This issue was addressed by Zeek in October, 2019.

Files

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tfo.pcap (3.52 KB) tfo.pcap		Guillermo Muñoz, 03/11/2020 01:36 PM
local.rules (152 Bytes) local.rules		Guillermo Muñoz, 03/11/2020 01:37 PM
suricata.yaml (73.3 KB) suricata.yaml		Guillermo Muñoz, 03/11/2020 01:37 PM