CVE-2018-17189

Http Server vulnerability

CVSS

5.3

EPSS

19.4%

EPSS pct

97th

Exploited

No known

In Apache HTTP server versions 2.4.37 and prior, by sending request bodies in a slow loris way to plain resources, the h2 stream for that request unnecessarily occupied a server thread cleaning up that incoming data. This affects only HTTP/2 (mod_http2) connections.

Affected vendor

Apache

Affected product

Http Server

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness type (CWE)

CWE-400 — Uncontrolled Resource Consumption

Published

2019-01-30

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 availability.

Its EPSS score of 19.4% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2018-17189

Confirm whether Apache Http Server is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-17189.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-17189

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-17189 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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