From 6b7705d5b29e226a24902a8dcc488836faaee33c Mon Sep 17 00:00:00 2001 From: Sebastiaan van Stijn Date: Wed, 12 Jul 2023 15:07:59 +0200 Subject: [PATCH] pkg/plugins: use a dummy hostname for local connections For local communications (npipe://, unix://), the hostname is not used, but we need valid and meaningful hostname. The current code used the socket path as hostname, which gets rejected by go1.20.6 and go1.19.11 because of a security fix for [CVE-2023-29406 ][1], which was implemented in https://go.dev/issue/60374. Prior versions go Go would clean the host header, and strip slashes in the process, but go1.20.6 and go1.19.11 no longer do, and reject the host header. Before this patch, tests would fail on go1.20.6: === FAIL: pkg/authorization TestAuthZRequestPlugin (15.01s) time="2023-07-12T12:53:45Z" level=warning msg="Unable to connect to plugin: //tmp/authz2422457390/authz-test-plugin.sock/AuthZPlugin.AuthZReq: Post \"http://%2F%2Ftmp%2Fauthz2422457390%2Fauthz-test-plugin.sock/AuthZPlugin.AuthZReq\": http: invalid Host header, retrying in 1s" time="2023-07-12T12:53:46Z" level=warning msg="Unable to connect to plugin: //tmp/authz2422457390/authz-test-plugin.sock/AuthZPlugin.AuthZReq: Post \"http://%2F%2Ftmp%2Fauthz2422457390%2Fauthz-test-plugin.sock/AuthZPlugin.AuthZReq\": http: invalid Host header, retrying in 2s" time="2023-07-12T12:53:48Z" level=warning msg="Unable to connect to plugin: //tmp/authz2422457390/authz-test-plugin.sock/AuthZPlugin.AuthZReq: Post \"http://%2F%2Ftmp%2Fauthz2422457390%2Fauthz-test-plugin.sock/AuthZPlugin.AuthZReq\": http: invalid Host header, retrying in 4s" time="2023-07-12T12:53:52Z" level=warning msg="Unable to connect to plugin: //tmp/authz2422457390/authz-test-plugin.sock/AuthZPlugin.AuthZReq: Post \"http://%2F%2Ftmp%2Fauthz2422457390%2Fauthz-test-plugin.sock/AuthZPlugin.AuthZReq\": http: invalid Host header, retrying in 8s" authz_unix_test.go:82: Failed to authorize request Post "http://%2F%2Ftmp%2Fauthz2422457390%2Fauthz-test-plugin.sock/AuthZPlugin.AuthZReq": http: invalid Host header [1]: https://github.com/advisories/GHSA-f8f7-69v5-w4vx Signed-off-by: Sebastiaan van Stijn --- pkg/plugins/client.go | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/pkg/plugins/client.go b/pkg/plugins/client.go index 91303ab5cd0d7..10f6a001cfeea 100644 --- a/pkg/plugins/client.go +++ b/pkg/plugins/client.go @@ -18,6 +18,12 @@ import ( const ( defaultTimeOut = 30 + + // dummyHost is a hostname used for local communication. + // + // For local communications (npipe://, unix://), the hostname is not used, + // but we need valid and meaningful hostname. + dummyHost = "plugin.moby.localhost" ) func newTransport(addr string, tlsConfig *tlsconfig.Options) (transport.Transport, error) { @@ -44,8 +50,12 @@ func newTransport(addr string, tlsConfig *tlsconfig.Options) (transport.Transpor return nil, err } scheme := httpScheme(u) - - return transport.NewHTTPTransport(tr, scheme, socket), nil + hostName := u.Host + if hostName == "" || u.Scheme == "unix" || u.Scheme == "npipe" { + // Override host header for non-tcp connections. + hostName = dummyHost + } + return transport.NewHTTPTransport(tr, scheme, hostName), nil } // NewClient creates a new plugin client (http).