[20.10] update to go1.18.9

Includes security fixes for net/http (CVE-2022-41717, CVE-2022-41720),
and os (CVE-2022-41720).

These minor releases include 2 security fixes following the security policy:

- os, net/http: avoid escapes from os.DirFS and http.Dir on Windows

  The os.DirFS function and http.Dir type provide access to a tree of files
  rooted at a given directory. These functions permitted access to Windows
  device files under that root. For example, os.DirFS("C:/tmp").Open("COM1")
  would open the COM1 device.
  Both os.DirFS and http.Dir only provide read-only filesystem access.

  In addition, on Windows, an os.DirFS for the directory \(the root of the
  current drive) can permit a maliciously crafted path to escape from the
  drive and access any path on the system.

  The behavior of os.DirFS("") has changed. Previously, an empty root was
  treated equivalently to "/", so os.DirFS("").Open("tmp") would open the
  path "/tmp". This now returns an error.

  This is CVE-2022-41720 and Go issue https://go.dev/issue/56694.

- 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 golang.org/x/net/http2 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 https://go.dev/issue/56350.

View the release notes for more information:
https://go.dev/doc/devel/release#go1.18.9

And the milestone on the issue tracker:
https://github.com/golang/go/issues?q=milestone%3AGo1.18.9+label%3ACherryPickApproved

Full diff: https://github.com/golang/go/compare/go1.18.8...go1.18.9

The golang.org/x/net fix is in 1e63c2f08a

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

Dockerfile

@@ -3,7 +3,7 @@
 ARG CROSS="false"
 ARG SYSTEMD="false"
 # IMPORTANT: When updating this please note that stdlib archive/tar pkg is vendored
-ARG GO_VERSION=1.18.8
+ARG GO_VERSION=1.18.9
 ARG DEBIAN_FRONTEND=noninteractive
 ARG VPNKIT_VERSION=0.5.0
 ARG DOCKER_BUILDTAGS="apparmor seccomp"

Dockerfile.e2e

@@ -1,4 +1,4 @@
-ARG GO_VERSION=1.18.8
+ARG GO_VERSION=1.18.9
 
 FROM golang:${GO_VERSION}-alpine AS base
 ENV GO111MODULE=off

Dockerfile.simple

@@ -5,7 +5,7 @@
 
 # This represents the bare minimum required to build and test Docker.
 
-ARG GO_VERSION=1.18.8
+ARG GO_VERSION=1.18.9
 
 FROM golang:${GO_VERSION}-buster
 ENV GO111MODULE=off

Dockerfile.windows

@@ -165,7 +165,7 @@ FROM microsoft/windowsservercore
 # Use PowerShell as the default shell
 SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue';"]
 
-ARG GO_VERSION=1.18.8
+ARG GO_VERSION=1.18.9
 ARG GOTESTSUM_VERSION=v1.7.0
 
 # Environment variable notes: