Fix infinite loops in QXmlStreamReader (CVE-2023-38197)

.qt5-qtbase.metadata

@@ -0,0 +1,2 @@
+a5bbeafa6319cd3e666b12ccc722a357de7230be qtbase-everywhere-opensource-src-5.15.9.tar.xz
+677b605bf6033bdfa84a676096ec6e77da6e844d kde-5.15-rollup-20230411.patch.gz

CVE-2023-37369-qtbase-5.15.patch

@@ -0,0 +1,203 @@
+diff --git a/src/corelib/serialization/qxmlstream.cpp b/src/corelib/serialization/qxmlstream.cpp
+index 7cd457ba3a..11d162cb79 100644
+--- a/src/corelib/serialization/qxmlstream.cpp
++++ b/src/corelib/serialization/qxmlstream.cpp
+@@ -1302,15 +1302,18 @@ inline int QXmlStreamReaderPrivate::fastScanContentCharList()
+     return n;
+ }
+
+-inline int QXmlStreamReaderPrivate::fastScanName(int *prefix)
++// Fast scan an XML attribute name (e.g. "xml:lang").
++inline QXmlStreamReaderPrivate::FastScanNameResult
++QXmlStreamReaderPrivate::fastScanName(Value *val)
+ {
+     int n = 0;
+     uint c;
+     while ((c = getChar()) != StreamEOF) {
+         if (n >= 4096) {
+             // This is too long to be a sensible name, and
+-            // can exhaust memory
+-            return 0;
++            // can exhaust memory, or the range of decltype(*prefix)
++            raiseNamePrefixTooLongError();
++            return {};
+         }
+         switch (c) {
+         case '\n':
+@@ -1339,23 +1342,23 @@ inline int QXmlStreamReaderPrivate::fastScanName(int *prefix)
+         case '+':
+         case '*':
+             putChar(c);
+-            if (prefix && *prefix == n+1) {
+-                *prefix = 0;
++            if (val && val->prefix == n + 1) {
++                val->prefix = 0;
+                 putChar(':');
+                 --n;
+             }
+-            return n;
++            return FastScanNameResult(n);
+         case ':':
+-            if (prefix) {
+-                if (*prefix == 0) {
+-                    *prefix = n+2;
++            if (val) {
++                if (val->prefix == 0) {
++                    val->prefix = n + 2;
+                 } else { // only one colon allowed according to the namespace spec.
+                     putChar(c);
+-                    return n;
++                    return FastScanNameResult(n);
+                 }
+             } else {
+                 putChar(c);
+-                return n;
++                return FastScanNameResult(n);
+             }
+             Q_FALLTHROUGH();
+         default:
+@@ -1364,12 +1367,12 @@ inline int QXmlStreamReaderPrivate::fastScanName(int *prefix)
+         }
+     }
+
+-    if (prefix)
+-        *prefix = 0;
++    if (val)
++        val->prefix = 0;
+     int pos = textBuffer.size() - n;
+     putString(textBuffer, pos);
+     textBuffer.resize(pos);
+-    return 0;
++    return FastScanNameResult(0);
+ }
+
+ enum NameChar { NameBeginning, NameNotBeginning, NotName };
+@@ -1878,6 +1881,14 @@ void QXmlStreamReaderPrivate::raiseWellFormedError(const QString &message)
+     raiseError(QXmlStreamReader::NotWellFormedError, message);
+ }
+
++void QXmlStreamReaderPrivate::raiseNamePrefixTooLongError()
++{
++    // TODO: add a ImplementationLimitsExceededError and use it instead
++    raiseError(QXmlStreamReader::NotWellFormedError,
++               QXmlStream::tr("Length of XML attribute name exceeds implemnetation limits (4KiB "
++                              "characters)."));
++}
++
+ void QXmlStreamReaderPrivate::parseError()
+ {
+
+diff --git a/src/corelib/serialization/qxmlstream.g b/src/corelib/serialization/qxmlstream.g
+index 4321fed68a..8c6a1a5887 100644
+--- a/src/corelib/serialization/qxmlstream.g
++++ b/src/corelib/serialization/qxmlstream.g
+@@ -516,7 +516,16 @@ public:
+     int fastScanLiteralContent();
+     int fastScanSpace();
+     int fastScanContentCharList();
+-    int fastScanName(int *prefix = nullptr);
++
++    struct FastScanNameResult {
++        FastScanNameResult() : ok(false) {}
++        explicit FastScanNameResult(int len) : addToLen(len), ok(true) { }
++        operator bool() { return ok; }
++        int operator*() { Q_ASSERT(ok); return addToLen; }
++        int addToLen;
++        bool ok;
++    };
++    FastScanNameResult fastScanName(Value *val = nullptr);
+     inline int fastScanNMTOKEN();
+
+
+@@ -525,6 +534,7 @@ public:
+
+     void raiseError(QXmlStreamReader::Error error, const QString& message = QString());
+     void raiseWellFormedError(const QString &message);
++    void raiseNamePrefixTooLongError();
+
+     QXmlStreamEntityResolver *entityResolver;
+
+@@ -1811,7 +1821,12 @@ space_opt ::= space;
+ qname ::= LETTER;
+ /.
+         case $rule_number: {
+-            sym(1).len += fastScanName(&sym(1).prefix);
++            Value &val = sym(1);
++            if (auto res = fastScanName(&val))
++                val.len += *res;
++            else
++                return false;
++
+             if (atEnd) {
+                 resume($rule_number);
+                 return false;
+@@ -1822,7 +1837,11 @@ qname ::= LETTER;
+ name ::= LETTER;
+ /.
+         case $rule_number:
+-            sym(1).len += fastScanName();
++            if (auto res = fastScanName())
++                sym(1).len += *res;
++            else
++                return false;
++
+             if (atEnd) {
+                 resume($rule_number);
+                 return false;
+diff --git a/src/corelib/serialization/qxmlstream_p.h b/src/corelib/serialization/qxmlstream_p.h
+index e5bde7b98e..b01484cac3 100644
+--- a/src/corelib/serialization/qxmlstream_p.h
++++ b/src/corelib/serialization/qxmlstream_p.h
+@@ -1005,7 +1005,16 @@ public:
+     int fastScanLiteralContent();
+     int fastScanSpace();
+     int fastScanContentCharList();
+-    int fastScanName(int *prefix = nullptr);
++
++    struct FastScanNameResult {
++        FastScanNameResult() : ok(false) {}
++        explicit FastScanNameResult(int len) : addToLen(len), ok(true) { }
++        operator bool() { return ok; }
++        int operator*() { Q_ASSERT(ok); return addToLen; }
++        int addToLen;
++        bool ok;
++    };
++    FastScanNameResult fastScanName(Value *val = nullptr);
+     inline int fastScanNMTOKEN();
+
+
+@@ -1014,6 +1023,7 @@ public:
+
+     void raiseError(QXmlStreamReader::Error error, const QString& message = QString());
+     void raiseWellFormedError(const QString &message);
++    void raiseNamePrefixTooLongError();
+
+     QXmlStreamEntityResolver *entityResolver;
+
+@@ -1939,7 +1949,12 @@ bool QXmlStreamReaderPrivate::parse()
+         break;
+
+         case 262: {
+-            sym(1).len += fastScanName(&sym(1).prefix);
++            Value &val = sym(1);
++            if (auto res = fastScanName(&val))
++                val.len += *res;
++            else
++                return false;
++
+             if (atEnd) {
+                 resume(262);
+                 return false;
+@@ -1947,7 +1962,11 @@ bool QXmlStreamReaderPrivate::parse()
+         } break;
+
+         case 263:
+-            sym(1).len += fastScanName();
++            if (auto res = fastScanName())
++                sym(1).len += *res;
++            else
++                return false;
++
+             if (atEnd) {
+                 resume(263);
+                 return false;

CVE-2023-38197-qtbase-5.15.patch

@@ -0,0 +1,219 @@
+diff --git a/src/corelib/serialization/qxmlstream.cpp b/src/corelib/serialization/qxmlstream.cpp
+index bf8a2a9..6ab5d49 100644
+--- a/src/corelib/serialization/qxmlstream.cpp
++++ b/src/corelib/serialization/qxmlstream.cpp
+@@ -160,7 +160,7 @@
+     addData() or by waiting for it to arrive on the device().
+
+     \value UnexpectedElementError The parser encountered an element
+-    that was different to those it expected.
++    or token that was different to those it expected.
+
+ */
+
+@@ -295,13 +295,34 @@
+
+   QXmlStreamReader is a well-formed XML 1.0 parser that does \e not
+   include external parsed entities. As long as no error occurs, the
+-  application code can thus be assured that the data provided by the
+-  stream reader satisfies the W3C's criteria for well-formed XML. For
+-  example, you can be certain that all tags are indeed nested and
+-  closed properly, that references to internal entities have been
+-  replaced with the correct replacement text, and that attributes have
+-  been normalized or added according to the internal subset of the
+-  DTD.
++  application code can thus be assured, that
++  \list
++  \li the data provided by the stream reader satisfies the W3C's
++      criteria for well-formed XML,
++  \li tokens are provided in a valid order.
++  \endlist
++
++  Unless QXmlStreamReader raises an error, it guarantees the following:
++  \list
++  \li All tags are nested and closed properly.
++  \li References to internal entities have been replaced with the
++      correct replacement text.
++  \li Attributes have been normalized or added according to the
++      internal subset of the \l DTD.
++  \li Tokens of type \l StartDocument happen before all others,
++      aside from comments and processing instructions.
++  \li At most one DOCTYPE element (a token of type \l DTD) is present.
++  \li If present, the DOCTYPE appears before all other elements,
++      aside from StartDocument, comments and processing instructions.
++  \endlist
++
++  In particular, once any token of type \l StartElement, \l EndElement,
++  \l Characters, \l EntityReference or \l EndDocument is seen, no
++  tokens of type StartDocument or DTD will be seen. If one is present in
++  the input stream, out of order, an error is raised.
++
++  \note The token types \l Comment and \l ProcessingInstruction may appear
++  anywhere in the stream.
+
+   If an error occurs while parsing, atEnd() and hasError() return
+   true, and error() returns the error that occurred. The functions
+@@ -620,6 +641,7 @@
+         d->token = -1;
+         return readNext();
+     }
++    d->checkToken();
+     return d->type;
+ }
+
+@@ -740,6 +762,14 @@
+ };
+
+
++static const char QXmlStreamReader_XmlContextString[] =
++    "Prolog\0"
++    "Body\0";
++
++static const short QXmlStreamReader_XmlContextString_indices[] = {
++    0, 7
++};
++
+ /*!
+     \property  QXmlStreamReader::namespaceProcessing
+     The namespace-processing flag of the stream reader
+@@ -775,6 +805,16 @@
+                          QXmlStreamReader_tokenTypeString_indices[d->type]);
+ }
+
++/*!
++   \internal
++   \return \param ctxt (Prolog/Body) as a string.
++ */
++QString contextString(QXmlStreamReaderPrivate::XmlContext ctxt)
++{
++    return QLatin1String(QXmlStreamReader_XmlContextString +
++                         QXmlStreamReader_XmlContextString_indices[static_cast<int>(ctxt)]);
++}
++
+ #endif // QT_NO_XMLSTREAMREADER
+
+ QXmlStreamPrivateTagStack::QXmlStreamPrivateTagStack()
+@@ -866,6 +906,8 @@
+
+     type = QXmlStreamReader::NoToken;
+     error = QXmlStreamReader::NoError;
++    currentContext = XmlContext::Prolog;
++    foundDTD = false;
+ }
+
+ /*
+@@ -4061,6 +4103,92 @@
+     }
+ }
+
++static bool isTokenAllowedInContext(QXmlStreamReader::TokenType type,
++                                               QXmlStreamReaderPrivate::XmlContext loc)
++{
++    switch (type) {
++    case QXmlStreamReader::StartDocument:
++    case QXmlStreamReader::DTD:
++        return loc == QXmlStreamReaderPrivate::XmlContext::Prolog;
++
++    case QXmlStreamReader::StartElement:
++    case QXmlStreamReader::EndElement:
++    case QXmlStreamReader::Characters:
++    case QXmlStreamReader::EntityReference:
++    case QXmlStreamReader::EndDocument:
++        return loc == QXmlStreamReaderPrivate::XmlContext::Body;
++
++    case QXmlStreamReader::Comment:
++    case QXmlStreamReader::ProcessingInstruction:
++        return true;
++
++    case QXmlStreamReader::NoToken:
++    case QXmlStreamReader::Invalid:
++        return false;
++    default:
++        return false;
++    }
++}
++
++/*!
++   \internal
++   \brief QXmlStreamReader::isValidToken
++   \return \c true if \param type is a valid token type.
++   \return \c false if \param type is an unexpected token,
++   which indicates a non-well-formed or invalid XML stream.
++ */
++bool QXmlStreamReaderPrivate::isValidToken(QXmlStreamReader::TokenType type)
++{
++    // Don't change currentContext, if Invalid or NoToken occur in the prolog
++    if (type == QXmlStreamReader::Invalid || type == QXmlStreamReader::NoToken)
++        return false;
++
++    // If a token type gets rejected in the body, there is no recovery
++    const bool result = isTokenAllowedInContext(type, currentContext);
++    if (result || currentContext == XmlContext::Body)
++        return result;
++
++    // First non-Prolog token observed => switch context to body and check again.
++    currentContext = XmlContext::Body;
++    return isTokenAllowedInContext(type, currentContext);
++}
++
++/*!
++   \internal
++   Checks token type and raises an error, if it is invalid
++   in the current context (prolog/body).
++ */
++void QXmlStreamReaderPrivate::checkToken()
++{
++    Q_Q(QXmlStreamReader);
++
++    // The token type must be consumed, to keep track if the body has been reached.
++    const XmlContext context = currentContext;
++    const bool ok = isValidToken(type);
++
++    // Do nothing if an error has been raised already (going along with an unexpected token)
++    if (error != QXmlStreamReader::Error::NoError)
++        return;
++
++    if (!ok) {
++        raiseError(QXmlStreamReader::UnexpectedElementError,
++                   QLatin1String("Unexpected token type %1 in %2.")
++                   .arg(q->tokenString(), contextString(context)));
++        return;
++    }
++
++    if (type != QXmlStreamReader::DTD)
++        return;
++
++    // Raise error on multiple DTD tokens
++    if (foundDTD) {
++        raiseError(QXmlStreamReader::UnexpectedElementError,
++                   QLatin1String("Found second DTD token in %1.").arg(contextString(context)));
++    } else {
++        foundDTD = true;
++    }
++}
++
+ /*!
+  \fn bool QXmlStreamAttributes::hasAttribute(const QString &qualifiedName) const
+  \since 4.5
+diff --git a/src/corelib/serialization/qxmlstream_p.h b/src/corelib/serialization/qxmlstream_p.h
+index 8f7c9e0..708059b 100644
+--- a/src/corelib/serialization/qxmlstream_p.h
++++ b/src/corelib/serialization/qxmlstream_p.h
+@@ -804,6 +804,17 @@
+ #endif
+     bool atEnd;
+
++    enum class XmlContext
++    {
++        Prolog,
++        Body,
++    };
++
++    XmlContext currentContext = XmlContext::Prolog;
++    bool foundDTD = false;
++    bool isValidToken(QXmlStreamReader::TokenType type);
++    void checkToken();
++
+     /*!
+       \sa setType()
+      */

qt5-qtbase.spec

@@ -57,7 +57,7 @@ BuildRequires: pkgconfig(libsystemd)
 Name:    qt5-qtbase
 Summary: Qt5 - QtBase components
 Version: 5.15.9
-Release: 6%{?dist}
+Release: 7%{?dist}
 
 
 # See LGPL_EXCEPTIONS.txt, for exception details
@@ -147,6 +147,8 @@ Patch110: CVE-2023-32762-qtbase-5.15.patch
 Patch111: CVE-2023-32763-qtbase-5.15.patch
 Patch112: CVE-2023-33285-qtbase-5.15.patch
 Patch113: CVE-2023-34410-qtbase-5.15.patch
+Patch114: CVE-2023-37369-qtbase-5.15.patch
+Patch115: CVE-2023-38197-qtbase-5.15.patch
 
 # gating related patches
 Patch200: qtbase-disable-tests-not-working-in-gating.patch
@@ -434,6 +436,8 @@ Qt5 libraries used for drawing widgets and OpenGL items.
 %patch -P111 -p1
 %patch -P112 -p1
 %patch -P113 -p1
+%patch -P114 -p1
+%patch -P115 -p1
 
 ## gating related patches
 %patch -P200 -p1 -b .disable-tests-not-working-in-gating
@@ -1134,6 +1138,10 @@ fi
 
 
 %changelog
+* Fri Jul 21 2023 Jan Grulich <jgrulich@redhat.com> - 5.15.9-7
+- Fix infinite loops in QXmlStreamReader (CVE-2023-38197)
+  Resolves: bz#2222771
+
 * Fri Jun 09 2023 Jan Grulich <jgrulich@redhat.com> - 5.15.9-6
 - Don't allow remote attacker to bypass security restrictions caused by
   flaw in certificate validation (CVE-2023-34410) (version #2)