THREATPORT/VULNERABILITY/CVE-2018-6794
MEDIUM SEVERITY

CVE-2018-6794

Suricata vulnerability

CVSS
5.3
EPSS
24.3%
EPSS pct
98th
Exploited
No known
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 vendor
Suricata Ids
Affected product
Suricata
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness type (CWE)
Published
2018-02-07

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to low impact to integrity.

Its EPSS score of 24.3% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2018-6794

  • Confirm whether Suricata Ids Suricata is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2018-6794.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-6794

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-6794 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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