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Apache HTTP Server < 2.4.38 HTTP/2 DoS Vulnerability (Linux)

Information

Severity

Severity

Medium

Family

Family

Web Servers

CVSSv2 Base

CVSSv2 Base

5.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

5 years ago

Modified

Modified

5 years ago

Summary

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 connections. A possible mitigation is to not enable the h2 protocol.

Affected Software

Affected Software

Apache HTTP server version 2.4.37 and prior.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 2.4.38 or later.

Common Vulnerabilities and Exposures (CVE)