upstream fix for CVE-2023-33285; rel 4

as advised in:
https://lists.qt-project.org/pipermail/announce/2023-June/000417.html

diff --git a/CVE-2023-33285-qtbase-5.15.diff b/CVE-2023-33285-qtbase-5.15.diff
new file mode 100644 (file)
index 0000000..ec33777
--- /dev/null
+++ b/CVE-2023-33285-qtbase-5.15.diff
@@ -0,0 +1,68 @@
+--- a/src/network/kernel/qdnslookup_unix.cpp
++++ b/src/network/kernel/qdnslookup_unix.cpp
+@@ -227,7 +227,6 @@ void QDnsLookupRunnable::query(const int requestType, const QByteArray &requestN
+     // responseLength in case of error, we still can extract the
+     // exact error code from the response.
+     HEADER *header = (HEADER*)response;
+-    const int answerCount = ntohs(header->ancount);
+     switch (header->rcode) {
+     case NOERROR:
+         break;
+@@ -260,18 +259,31 @@ void QDnsLookupRunnable::query(const int requestType, const QByteArray &requestN
+         return;
+     }
+
+-    // Skip the query host, type (2 bytes) and class (2 bytes).
+     char host[PACKETSZ], answer[PACKETSZ];
+     unsigned char *p = response + sizeof(HEADER);
+-    int status = local_dn_expand(response, response + responseLength, p, host, sizeof(host));
+-    if (status < 0) {
++    int status;
++
++    if (ntohs(header->qdcount) == 1) {
++        // Skip the query host, type (2 bytes) and class (2 bytes).
++        status = local_dn_expand(response, response + responseLength, p, host, sizeof(host));
++        if (status < 0) {
++            reply->error = QDnsLookup::InvalidReplyError;
++            reply->errorString = tr("Could not expand domain name");
++            return;
++        }
++        if ((p - response) + status + 4 >= responseLength)
++            header->qdcount = 0xffff;   // invalid reply below
++        else
++            p += status + 4;
++    }
++    if (ntohs(header->qdcount) > 1) {
+         reply->error = QDnsLookup::InvalidReplyError;
+-        reply->errorString = tr("Could not expand domain name");
++        reply->errorString = tr("Invalid reply received");
+         return;
+     }
+-    p += status + 4;
+
+     // Extract results.
++    const int answerCount = ntohs(header->ancount);
+     int answerIndex = 0;
+     while ((p < response + responseLength) && (answerIndex < answerCount)) {
+         status = local_dn_expand(response, response + responseLength, p, host, sizeof(host));
+@@ -283,6 +295,11 @@ void QDnsLookupRunnable::query(const int requestType, const QByteArray &requestN
+         const QString name = QUrl::fromAce(host);
+
+         p += status;
++
++        if ((p - response) + 10 > responseLength) {
++            // probably just a truncated reply, return what we have
++            return;
++        }
+         const quint16 type = (p[0] << 8) | p[1];
+         p += 2; // RR type
+         p += 2; // RR class
+@@ -290,6 +307,8 @@ void QDnsLookupRunnable::query(const int requestType, const QByteArray &requestN
+         p += 4;
+         const quint16 size = (p[0] << 8) | p[1];
+         p += 2;
++        if ((p - response) + size > responseLength)
++            return;             // truncated
+
+         if (type == QDnsLookup::A) {
+             if (size != 4) {

diff --git a/qt5-qtbase.spec b/qt5-qtbase.spec
index be7b7dfe99b1ef0e0b1cfaf4418bd88f0b1720d5..153ac22a30e25a9ce1ad06b2632f08ef003dc39e 100644 (file)
--- a/qt5-qtbase.spec
+++ b/qt5-qtbase.spec
@@ -71,7 +71,7 @@ Summary:      Qt5 - base components
 Summary(pl.UTF-8):     Biblioteka Qt5 - podstawowe komponenty
 Name:          qt5-%{orgname}
 Version:       5.15.9
-Release:       3
+Release:       4
 License:       LGPL v3 or GPL v2 or GPL v3 or commercial
 Group:         X11/Libraries
 Source0:       https://download.qt.io/official_releases/qt/5.15/%{version}/submodules/%{orgname}-everywhere-opensource-src-%{version}.tar.xz
@@ -83,6 +83,7 @@ Patch1:               parallel-install.patch
 Patch2:                egl-x11.patch
 Patch3:                CVE-2023-32763-qtbase-5.15.diff
 Patch4:                CVE-2023-32762-qtbase-5.15.diff
+Patch5:                CVE-2023-33285-qtbase-5.15.diff
 URL:           https://www.qt.io/
 %{?with_directfb:BuildRequires:        DirectFB-devel}
 BuildRequires: EGL-devel
@@ -1180,6 +1181,7 @@ Generator plików makefile dla aplikacji Qt5.
 %patch2 -p1
 %patch3 -p1
 %patch4 -p1
+%patch5 -p1
 
 %{__sed} -i -e 's,usr/X11R6/,usr/,g' mkspecs/linux-g++-64/qmake.conf