From 6d6512a3c292581b11ef975546b40168662de83a Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Thu, 22 Aug 2024 12:20:34 +0200 Subject: [PATCH] package/qt6/qt6base: backport fix for CVE-2024-39936 This commit backports an upstream patch to fix CVE-2024-39936. Signed-off-by: Thomas Petazzoni Signed-off-by: Peter Korsgaard --- ...communication-until-encrypted-can-be.patch | 248 ++++++++++++++++++ package/qt6/qt6base/qt6base.mk | 2 + 2 files changed, 250 insertions(+) create mode 100644 package/qt6/qt6base/0016-HTTP2-Delay-any-communication-until-encrypted-can-be.patch diff --git a/package/qt6/qt6base/0016-HTTP2-Delay-any-communication-until-encrypted-can-be.patch b/package/qt6/qt6base/0016-HTTP2-Delay-any-communication-until-encrypted-can-be.patch new file mode 100644 index 0000000000..ab8a46a95e --- /dev/null +++ b/package/qt6/qt6base/0016-HTTP2-Delay-any-communication-until-encrypted-can-be.patch @@ -0,0 +1,248 @@ +From 6d2a5ad09074bd77b2de09adf7147107ee0db026 Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?M=C3=A5rten=20Nordheim?= +Date: Tue, 25 Jun 2024 17:09:35 +0200 +Subject: [PATCH] HTTP2: Delay any communication until encrypted() can be + responded to + +We have the encrypted() signal that lets users do extra checks on the +established connection. It is emitted as BlockingQueued, so the HTTP +thread stalls until it is done emitting. Users can potentially call +abort() on the QNetworkReply at that point, which is passed as a Queued +call back to the HTTP thread. That means that any currently queued +signal emission will be processed before the abort() call is processed. + +In the case of HTTP2 it is a little special since it is multiplexed and +the code is built to start requests as they are available. This means +that, while the code worked fine for HTTP1, since one connection only +has one request, it is not working for HTTP2, since we try to send more +requests in-between the encrypted() signal and the abort() call. + +This patch changes the code to delay any communication until the +encrypted() signal has been emitted and processed, for HTTP2 only. +It's done by adding a few booleans, both to know that we have to return +early and so we can keep track of what events arose and what we need to +resume once enough time has passed that any abort() call must have been +processed. + +Fixes: QTBUG-126610 +Pick-to: 6.5 6.2 5.15 5.12 +Change-Id: Ic25a600c278203256e35f541026f34a8783235ae +Reviewed-by: Marc Mutz +Reviewed-by: Volker Hilsheimer +(cherry picked from commit b1e75376cc3adfc7da5502a277dfe9711f3e0536) +Reviewed-by: Qt Cherry-pick Bot +(cherry picked from commit 0fb43e4395da34d561814242a0186999e4956e28) + +Fixes: https://security-tracker.debian.org/tracker/CVE-2024-39936 +Upstream: https://github.com/qt/qtbase/commit/2b1e36e183ce75c224305c7a94457b92f7a5cf58 +Signed-off-by: Thomas Petazzoni +--- + src/network/access/qhttp2protocolhandler.cpp | 6 +-- + .../access/qhttpnetworkconnectionchannel.cpp | 48 ++++++++++++++++++- + .../access/qhttpnetworkconnectionchannel_p.h | 6 +++ + tests/auto/network/access/http2/tst_http2.cpp | 44 +++++++++++++++++ + 4 files changed, 99 insertions(+), 5 deletions(-) + +diff --git a/src/network/access/qhttp2protocolhandler.cpp b/src/network/access/qhttp2protocolhandler.cpp +index 562b883242f..8c543efc742 100644 +--- a/src/network/access/qhttp2protocolhandler.cpp ++++ b/src/network/access/qhttp2protocolhandler.cpp +@@ -335,12 +335,12 @@ bool QHttp2ProtocolHandler::sendRequest() + } + } + +- if (!prefaceSent && !sendClientPreface()) +- return false; +- + if (!requests.size()) + return true; + ++ if (!prefaceSent && !sendClientPreface()) ++ return false; ++ + m_channel->state = QHttpNetworkConnectionChannel::WritingState; + // Check what was promised/pushed, maybe we do not have to send a request + // and have a response already? +diff --git a/src/network/access/qhttpnetworkconnectionchannel.cpp b/src/network/access/qhttpnetworkconnectionchannel.cpp +index 1e036bdc450..a64d1a25898 100644 +--- a/src/network/access/qhttpnetworkconnectionchannel.cpp ++++ b/src/network/access/qhttpnetworkconnectionchannel.cpp +@@ -209,6 +209,10 @@ void QHttpNetworkConnectionChannel::abort() + bool QHttpNetworkConnectionChannel::sendRequest() + { + Q_ASSERT(protocolHandler); ++ if (waitingForPotentialAbort) { ++ needInvokeSendRequest = true; ++ return false; // this return value is unused ++ } + return protocolHandler->sendRequest(); + } + +@@ -221,21 +225,28 @@ bool QHttpNetworkConnectionChannel::sendRequest() + void QHttpNetworkConnectionChannel::sendRequestDelayed() + { + QMetaObject::invokeMethod(this, [this] { +- Q_ASSERT(protocolHandler); + if (reply) +- protocolHandler->sendRequest(); ++ sendRequest(); + }, Qt::ConnectionType::QueuedConnection); + } + + void QHttpNetworkConnectionChannel::_q_receiveReply() + { + Q_ASSERT(protocolHandler); ++ if (waitingForPotentialAbort) { ++ needInvokeReceiveReply = true; ++ return; ++ } + protocolHandler->_q_receiveReply(); + } + + void QHttpNetworkConnectionChannel::_q_readyRead() + { + Q_ASSERT(protocolHandler); ++ if (waitingForPotentialAbort) { ++ needInvokeReadyRead = true; ++ return; ++ } + protocolHandler->_q_readyRead(); + } + +@@ -1232,7 +1243,18 @@ void QHttpNetworkConnectionChannel::_q_encrypted() + // Similar to HTTP/1.1 counterpart below: + const auto &h2Pairs = h2RequestsToSend.values(); // (request, reply) + const auto &pair = h2Pairs.first(); ++ waitingForPotentialAbort = true; + emit pair.second->encrypted(); ++ ++ // We don't send or handle any received data until any effects from ++ // emitting encrypted() have been processed. This is necessary ++ // because the user may have called abort(). We may also abort the ++ // whole connection if the request has been aborted and there is ++ // no more requests to send. ++ QMetaObject::invokeMethod(this, ++ &QHttpNetworkConnectionChannel::checkAndResumeCommunication, ++ Qt::QueuedConnection); ++ + // In case our peer has sent us its settings (window size, max concurrent streams etc.) + // let's give _q_receiveReply a chance to read them first ('invokeMethod', QueuedConnection). + QMetaObject::invokeMethod(connection, "_q_startNextRequest", Qt::QueuedConnection); +@@ -1250,6 +1272,28 @@ void QHttpNetworkConnectionChannel::_q_encrypted() + } + } + ++ ++void QHttpNetworkConnectionChannel::checkAndResumeCommunication() ++{ ++ Q_ASSERT(connection->connectionType() == QHttpNetworkConnection::ConnectionTypeHTTP2 ++ || connection->connectionType() == QHttpNetworkConnection::ConnectionTypeHTTP2Direct); ++ ++ // Because HTTP/2 requires that we send a SETTINGS frame as the first thing we do, and respond ++ // to a SETTINGS frame with an ACK, we need to delay any handling until we can ensure that any ++ // effects from emitting encrypted() have been processed. ++ // This function is called after encrypted() was emitted, so check for changes. ++ ++ if (!reply && h2RequestsToSend.isEmpty()) ++ abort(); ++ waitingForPotentialAbort = false; ++ if (needInvokeReadyRead) ++ _q_readyRead(); ++ if (needInvokeReceiveReply) ++ _q_receiveReply(); ++ if (needInvokeSendRequest) ++ sendRequest(); ++} ++ + void QHttpNetworkConnectionChannel::requeueHttp2Requests() + { + QList h2Pairs = h2RequestsToSend.values(); +diff --git a/src/network/access/qhttpnetworkconnectionchannel_p.h b/src/network/access/qhttpnetworkconnectionchannel_p.h +index 0772a4452b3..2a5336ca8a4 100644 +--- a/src/network/access/qhttpnetworkconnectionchannel_p.h ++++ b/src/network/access/qhttpnetworkconnectionchannel_p.h +@@ -73,6 +73,10 @@ public: + QAbstractSocket *socket; + bool ssl; + bool isInitialized; ++ bool waitingForPotentialAbort = false; ++ bool needInvokeReceiveReply = false; ++ bool needInvokeReadyRead = false; ++ bool needInvokeSendRequest = false; + ChannelState state; + QHttpNetworkRequest request; // current request, only used for HTTP + QHttpNetworkReply *reply; // current reply for this request, only used for HTTP +@@ -145,6 +149,8 @@ public: + void closeAndResendCurrentRequest(); + void resendCurrentRequest(); + ++ void checkAndResumeCommunication(); ++ + bool isSocketBusy() const; + bool isSocketWriting() const; + bool isSocketWaiting() const; +diff --git a/tests/auto/network/access/http2/tst_http2.cpp b/tests/auto/network/access/http2/tst_http2.cpp +index 9c1a63bae1e..30abbb0d3ed 100644 +--- a/tests/auto/network/access/http2/tst_http2.cpp ++++ b/tests/auto/network/access/http2/tst_http2.cpp +@@ -99,6 +99,8 @@ private slots: + void redirect_data(); + void redirect(); + ++ void abortOnEncrypted(); ++ + protected slots: + // Slots to listen to our in-process server: + void serverStarted(quint16 port); +@@ -1280,6 +1282,48 @@ void tst_Http2::redirect() + QTRY_VERIFY(serverGotSettingsACK); + } + ++void tst_Http2::abortOnEncrypted() ++{ ++#if !QT_CONFIG(ssl) ++ QSKIP("TLS support is needed for this test"); ++#else ++ clearHTTP2State(); ++ serverPort = 0; ++ ++ ServerPtr targetServer(newServer(defaultServerSettings, H2Type::h2Direct)); ++ ++ QMetaObject::invokeMethod(targetServer.data(), "startServer", Qt::QueuedConnection); ++ runEventLoop(); ++ ++ nRequests = 1; ++ nSentRequests = 0; ++ ++ const auto url = requestUrl(H2Type::h2Direct); ++ QNetworkRequest request(url); ++ request.setAttribute(QNetworkRequest::Http2DirectAttribute, true); ++ ++ std::unique_ptr reply{manager->get(request)}; ++ reply->ignoreSslErrors(); ++ connect(reply.get(), &QNetworkReply::encrypted, reply.get(), [reply = reply.get()](){ ++ reply->abort(); ++ }); ++ connect(reply.get(), &QNetworkReply::errorOccurred, this, &tst_Http2::replyFinishedWithError); ++ ++ runEventLoop(); ++ STOP_ON_FAILURE ++ ++ QCOMPARE(nRequests, 0); ++ QCOMPARE(reply->error(), QNetworkReply::OperationCanceledError); ++ ++ const bool res = QTest::qWaitFor( ++ [this, server = targetServer.get()]() { ++ return serverGotSettingsACK || prefaceOK || nSentRequests > 0; ++ }, ++ 500); ++ QVERIFY(!res); ++#endif // QT_CONFIG(ssl) ++} ++ + void tst_Http2::serverStarted(quint16 port) + { + serverPort = port; +-- +2.46.0 + diff --git a/package/qt6/qt6base/qt6base.mk b/package/qt6/qt6base/qt6base.mk index 291ac4a821..471edfb4f9 100644 --- a/package/qt6/qt6base/qt6base.mk +++ b/package/qt6/qt6base/qt6base.mk @@ -24,6 +24,8 @@ QT6BASE_IGNORE_CVES += CVE-2023-37369 # 0014-Schannel-Reject-certificate-not-signed-by-a-configur.patch # 0015-Ssl-Copy-the-on-demand-cert-loading-bool-from-defaul.patch QT6BASE_IGNORE_CVES += CVE-2023-34410 +# 0016-HTTP2-Delay-any-communication-until-encrypted-can-be.patch +QT6BASE_IGNORE_CVES += CVE-2024-39936 QT6BASE_CMAKE_BACKEND = ninja