5.3
MEDIUM
CVE-2018-6794
Suricata HTTP Detection Bypass
Description

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.

INFO

Published Date :

Feb. 7, 2018, 5:29 a.m.

Last Modified :

Nov. 21, 2024, 4:11 a.m.

Source :

[email protected]

Remotely Exploitable :

Yes !

Impact Score :

1.4

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2018-6794 has a 4 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2018-6794 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Debian debian_linux
1 Suricata-ids suricata
1 Oisf suricata
: Total Affected Vendor : 3 | Products : 3
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2018-6794.

URL Resource
https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html Mailing List Third Party Advisory
https://redmine.openinfosecfoundation.org/issues/2427 Third Party Advisory
https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/ Vendor Advisory
https://www.exploit-db.com/exploits/44247/ Exploit Third Party Advisory VDB Entry
https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1 Patch Third Party Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html Mailing List Third Party Advisory
https://redmine.openinfosecfoundation.org/issues/2427 Third Party Advisory
https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/ Vendor Advisory
https://www.exploit-db.com/exploits/44247/ Exploit Third Party Advisory VDB Entry

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
lnick2023/nicenice

None

Updated: 1 year, 10 months ago
0 stars 0 fork 0 watcher
Born at : Jan. 11, 2023, 1:21 p.m. This repo has been linked 1042 different CVEs too.
Profile Photo
xbl3/awesome-cve-poc_qazbnm456

None

Updated: 3 months, 1 week ago
13 stars 4 fork 4 watcher
Born at : May 25, 2020, 7:51 a.m. This repo has been linked 1027 different CVEs too.
Profile Photo
kirillwow/ids_bypass

IDS Bypass tricks

Makefile C

Updated: 3 months, 1 week ago
121 stars 23 fork 23 watcher
Born at : March 2, 2018, 11:23 a.m. This repo has been linked 3 different CVEs too.
Profile Photo
qazbnm456/awesome-cve-poc

✍️ A curated list of CVE PoCs.

awesome cve poc

Updated: 2 months, 2 weeks ago
3289 stars 678 fork 678 watcher
Born at : Feb. 2, 2017, 6:43 a.m. This repo has been linked 1042 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2018-6794 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2018-6794 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Mar. 01, 2019

    Action Type Old Value New Value
    Changed Reference Type https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/ No Types Assigned https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/ Vendor Advisory
    Changed Reference Type https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html No Types Assigned https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html Mailing List, Third Party Advisory
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • CVE Modified by [email protected]

    Dec. 05, 2018

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html [No Types Assigned]
  • CVE Modified by [email protected]

    Jun. 14, 2018

    Action Type Old Value New Value
    Changed Description Suricata before 4.1 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. 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.
    Added Reference https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/ [No Types Assigned]
  • Reanalysis by [email protected]

    Jun. 07, 2018

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:* versions up to (excluding) 4.1 OR *cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:* versions up to (excluding) 4.0.4
  • Initial Analysis by [email protected]

    Mar. 13, 2018

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:N/C:N/I:P/A:N)
    Added CVSS V3 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    Changed Reference Type https://www.exploit-db.com/exploits/44247/ No Types Assigned https://www.exploit-db.com/exploits/44247/ Exploit, Third Party Advisory, VDB Entry
    Changed Reference Type https://redmine.openinfosecfoundation.org/issues/2427 No Types Assigned https://redmine.openinfosecfoundation.org/issues/2427 Third Party Advisory
    Changed Reference Type https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1 No Types Assigned https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1 Patch, Third Party Advisory
    Added CWE CWE-693
    Added CPE Configuration OR *cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:* versions up to (excluding) 4.1
  • CVE Modified by [email protected]

    Mar. 08, 2018

    Action Type Old Value New Value
    Added Reference https://www.exploit-db.com/exploits/44247/ [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2018-6794 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2018-6794 weaknesses.

CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs Accessing Functionality Not Properly Constrained by ACLs CAPEC-17: Using Malicious Files Using Malicious Files CAPEC-20: Encryption Brute Forcing Encryption Brute Forcing CAPEC-22: Exploiting Trust in Client Exploiting Trust in Client CAPEC-36: Using Unpublished Interfaces or Functionality Using Unpublished Interfaces or Functionality CAPEC-51: Poison Web Service Registry Poison Web Service Registry CAPEC-57: Utilizing REST's Trust in the System Resource to Obtain Sensitive Data Utilizing REST's Trust in the System Resource to Obtain Sensitive Data CAPEC-59: Session Credential Falsification through Prediction Session Credential Falsification through Prediction CAPEC-65: Sniff Application Code Sniff Application Code CAPEC-74: Manipulating State Manipulating State CAPEC-87: Forceful Browsing Forceful Browsing CAPEC-107: Cross Site Tracing Cross Site Tracing CAPEC-127: Directory Indexing Directory Indexing CAPEC-237: Escaping a Sandbox by Calling Code in Another Language Escaping a Sandbox by Calling Code in Another Language CAPEC-477: Signature Spoofing by Mixing Signed and Unsigned Content Signature Spoofing by Mixing Signed and Unsigned Content CAPEC-480: Escaping Virtualization Escaping Virtualization CAPEC-668: Key Negotiation of Bluetooth Attack (KNOB) Key Negotiation of Bluetooth Attack (KNOB)
Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

59.67 }} -4.79%

score

0.97260

percentile

CVSS30 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
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