From patchwork Tue Oct 22 15:24:11 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= X-Patchwork-Id: 13845807 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 54967D2C56A for ; Tue, 22 Oct 2024 15:25:14 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1t3Gkk-00089s-GJ; Tue, 22 Oct 2024 11:24:58 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t3Gki-000840-HO for qemu-devel@nongnu.org; Tue, 22 Oct 2024 11:24:56 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1t3Gkg-00051o-Sh for qemu-devel@nongnu.org; Tue, 22 Oct 2024 11:24:56 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1729610694; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=OsVg9LKAx4ynICHdhBCnNQId5jUOMnNKGUPWtgNz6/Q=; b=HABNq4uGo/VJMDbiGR2NNPGlAMoVfdW7rziCwT4Kl08ndo2ImaatEP5mQArWgxfYTpAnr1 dKdRcp1f0mLq7pNsNtCynpqLMtmwbSQAYIJgDGEVHENW8nmByvJ0fa0PMiDxRjw0WYaDE2 bR4JTfHEFHH6nBeaUVdh4RpBlCPrG3g= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-695-CXrmnBCaNeW1lhg5fLeJJA-1; Tue, 22 Oct 2024 11:24:48 -0400 X-MC-Unique: CXrmnBCaNeW1lhg5fLeJJA-1 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id C5EAD195421E; Tue, 22 Oct 2024 15:24:47 +0000 (UTC) Received: from toolbox.redhat.com (unknown [10.42.28.59]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id CA3C51955F39; Tue, 22 Oct 2024 15:24:45 +0000 (UTC) From: =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: Wainer dos Santos Moschetta , =?utf-8?q?Daniel_P=2E?= =?utf-8?q?_Berrang=C3=A9?= , =?utf-8?q?Marc-Andr=C3=A9?= =?utf-8?q?_Lureau?= , =?utf-8?q?Philippe_Mathi?= =?utf-8?q?eu-Daud=C3=A9?= , Thomas Huth , =?utf-8?q?Alex_Benn=C3=A9e?= Subject: [PULL 10/14] ui/vnc: fix skipping SASL SSF on UNIX sockets Date: Tue, 22 Oct 2024 16:24:11 +0100 Message-ID: <20241022152415.1632556-11-berrange@redhat.com> In-Reply-To: <20241022152415.1632556-1-berrange@redhat.com> References: <20241022152415.1632556-1-berrange@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass client-ip=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -42 X-Spam_score: -4.3 X-Spam_bar: ---- X-Spam_report: (-4.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.519, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-1.697, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The 'is_unix' flag is set on the VNC server during startup, however, a regression in: commit 8bd22f477f68bbd7a9c88e926e7a58bf65605e39 Author: Daniel P. Berrangé Date: Fri Feb 3 12:06:46 2017 +0000 ui: extract code to connect/listen from vnc_display_open meant we stopped setting the 'is_unix' flag when QEMU listens for VNC sockets, only setting when QEMU does a reverse VNC connection. Rather than fixing setting of the 'is_unix' flag, remove it, and directly check the live client socket address. This is more robust to a possible situation where the VNC server was listening on a mixture of INET and UNIX sockets. Reviewed-by: Marc-André Lureau Signed-off-by: Daniel P. Berrangé --- ui/vnc-auth-sasl.c | 14 +++++++++++--- ui/vnc.c | 3 --- ui/vnc.h | 1 - 3 files changed, 11 insertions(+), 7 deletions(-) diff --git a/ui/vnc-auth-sasl.c b/ui/vnc-auth-sasl.c index edf19deb3b..43515447fb 100644 --- a/ui/vnc-auth-sasl.c +++ b/ui/vnc-auth-sasl.c @@ -551,6 +551,13 @@ vnc_socket_ip_addr_string(QIOChannelSocket *ioc, return 0; } +static bool +vnc_socket_is_unix(QIOChannelSocket *ioc) +{ + SocketAddress *addr = qio_channel_socket_get_local_address(ioc, NULL); + return addr && addr->type == SOCKET_ADDRESS_TYPE_UNIX; +} + void start_auth_sasl(VncState *vs) { const char *mechlist = NULL; @@ -627,10 +634,11 @@ void start_auth_sasl(VncState *vs) memset (&secprops, 0, sizeof secprops); /* Inform SASL that we've got an external SSF layer from TLS. * - * Disable SSF, if using TLS+x509+SASL only. TLS without x509 - * is not sufficiently strong + * Disable SSF, if using TLS+x509+SASL only, or UNIX sockets. + * TLS without x509 is not sufficiently strong, nor is plain + * TCP */ - if (vs->vd->is_unix || + if (vnc_socket_is_unix(vs->sioc) || (vs->auth == VNC_AUTH_VENCRYPT && vs->subauth == VNC_AUTH_VENCRYPT_X509SASL)) { /* If we've got TLS or UNIX domain sock, we don't care about SSF */ diff --git a/ui/vnc.c b/ui/vnc.c index 93a8dbd253..5fcb35bf25 100644 --- a/ui/vnc.c +++ b/ui/vnc.c @@ -3430,7 +3430,6 @@ static void vnc_display_close(VncDisplay *vd) if (!vd) { return; } - vd->is_unix = false; if (vd->listener) { qio_net_listener_disconnect(vd->listener); @@ -3932,8 +3931,6 @@ static int vnc_display_connect(VncDisplay *vd, error_setg(errp, "Expected a single address in reverse mode"); return -1; } - /* TODO SOCKET_ADDRESS_TYPE_FD when fd has AF_UNIX */ - vd->is_unix = saddr_list->value->type == SOCKET_ADDRESS_TYPE_UNIX; sioc = qio_channel_socket_new(); qio_channel_set_name(QIO_CHANNEL(sioc), "vnc-reverse"); if (qio_channel_socket_connect_sync(sioc, saddr_list->value, errp) < 0) { diff --git a/ui/vnc.h b/ui/vnc.h index e5fa2efa3e..acc53a2cc1 100644 --- a/ui/vnc.h +++ b/ui/vnc.h @@ -168,7 +168,6 @@ struct VncDisplay const char *id; QTAILQ_ENTRY(VncDisplay) next; - bool is_unix; char *password; time_t expires; int auth;