CVE-2018-6794 EXPLOIT
5.3
MEDIUM · CVSS 3.0 · EPSS 24.3% (pctl 98)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 5.3 (MEDIUM, v3.0) |
|---|---|
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N |
| EPSS | 24.29% — more likely to be exploited than 98% of all CVEs |
| Weakness | CWE-693 |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2018-02-07 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| debian | debian linux |
| suricata-ids | suricata |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | Suricata < 4.0.4 - IDS Detection Bypass | 2018-03-05 |
References
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1
- https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html
- https://redmine.openinfosecfoundation.org/issues/2427
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
- https://www.exploit-db.com/exploits/44247/
- https://github.com/OISF/suricata/pull/3202/commits/e1ef57c848bbe4e567d5d4b66d346a742e3f77a1
- https://lists.debian.org/debian-lts-announce/2018/12/msg00000.html
- https://redmine.openinfosecfoundation.org/issues/2427
- https://suricata-ids.org/2018/02/14/suricata-4-0-4-available/
- https://www.exploit-db.com/exploits/44247/
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