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Bug 885999 (CVE-2022-41717)

Summary: [Tracker] Denial of service in Go's http server
Product: Gentoo Security Reporter: John Helmert III <ajak>
Component: VulnerabilitiesAssignee: Gentoo Security <security>
Status: CONFIRMED ---    
Severity: normal    
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Package list:
Runtime testing required: ---
Bug Depends on: 883783, 885997, 886509    
Bug Blocks:    

Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-12-14 23:21:32 UTC
"net/http: limit canonical header cache by bytes, not entries

An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests.

HTTP/2 server connections contain a cache of HTTP header keys sent by the client. While the total number of entries in this cache is capped, an attacker sending very large keys can cause the server to allocate approximately 64 MiB per open connection.

This issue is also fixed in vX.Y.Z, for users manually configuring HTTP/2.

Thanks to Josselin Costanzi for reporting this issue.

This is CVE-2022-41717 and Go issue"