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MitreCVE-2018-6794

HistoryFeb 07, 2018 - 5:29 a.m.

CVE-2018-6794

2018-02-0705:29:00

CWE-693

mitre

web.nvd.nist.gov

cve-2018-6794

http detection bypass

suricata

security vulnerability

ids

nvd

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS3

5.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

AI Score

5.3

Confidence

High

EPSS

0.597

Percentile

97.8%

JSON

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.

Affected configurations

Nvd

Node

suricata-idssuricataRange<4.0.4

Node

debiandebian_linuxMatch8.0

VendorProductVersionCPE
suricata-idssuricata*cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:*
debiandebian_linux8.0cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*