National Vulnerability Database

National Vulnerability Database

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    Vulnerabilities Detail

CVE-2018-6794 Detail

Current 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.

Source:  MITRE
Description Last Modified:  06/13/2018
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 5.3 MEDIUM
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N (V3 legend)
Impact Score: 1.4
Exploitability Score: 3.9

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): Low
Availability (A): None

CVSS v2.0 Severity and Metrics:

Base Score: 5.0 MEDIUM
Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N) (V2 legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0

Access Vector (AV): Network
Access Complexity (AC): Insufficient_Info
Authentication (AU): None
Confidentiality (C): None
Integrity (I): Partial
Availability (A): None
Additional Information:
Allows unauthorized modification

References to Advisories, Solutions, and Tools

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Hyperlink 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

Technical Details

Vulnerability Type (View All)

  • Protection Mechanism Failure (CWE-693)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:suricata-ids:suricata:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
4.0.4

Configuration 2 ( hide )
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

6 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2018-6794
NVD Published Date:
02/07/2018
NVD Last Modified:
03/01/2019