CVE-2021-31525

A vulnerability was detected in net/http of the Go standard library when parsing very large HTTP header values, causing a crash and subsequent denial of service. This vulnerability affects both clients and servers written in Go, however, servers are only vulnerable if the value of MaxHeaderBytes has been increased from the default.

This vulnerability potentially affects any component written in Go that uses net/http from the standard library. In OpenShift Container Platform (OCP), OpenShift Virtualization, OpenShift ServiceMesh (OSSM) and OpenShift distributed tracing (formerly OpenShift Jaeger), no server side component allows HTTP header values larger than 1 MB (the default), preventing this vulnerability from being exploited by malicious clients. It is possible for components that make client connections to malicious servers to be exploited, however the maximum impact is a crash. This vulnerability is rated Low for the following components:

• OpenShift Container Platform
• OpenShift Virtualization
• OpenShift ServiceMesh
• OpenShift distributed tracing components.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.