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f30f363ff0
qt6-qtbase/CVE-2023-24607-qtbase-6.4.patch
Jan Grulich f30f363ff0 Fix possible DOS involving the Qt SQL ODBC driver plugin 
CVE-2023-24607
2023-02-08 13:45:43 +01:00

335 lines
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--- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
+++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
@@ -58,23 +58,39 @@ inline static QString fromSQLTCHAR(const QVarLengthArray<SQLTCHAR>& input, qsize
return result;
}
+template <size_t SizeOfChar = sizeof(SQLTCHAR)>
+void toSQLTCHARImpl(QVarLengthArray<SQLTCHAR> &result, const QString &input); // primary template undefined
+
+template <typename Container>
+void do_append(QVarLengthArray<SQLTCHAR> &result, const Container &c)
+{
+ result.append(reinterpret_cast<const SQLTCHAR *>(c.data()), c.size());
+}
+
+template <>
+void toSQLTCHARImpl<1>(QVarLengthArray<SQLTCHAR> &result, const QString &input)
+{
+ const auto u8 = input.toUtf8();
+ do_append(result, u8);
+}
+
+template <>
+void toSQLTCHARImpl<2>(QVarLengthArray<SQLTCHAR> &result, const QString &input)
+{
+ do_append(result, input);
+}
+
+template <>
+void toSQLTCHARImpl<4>(QVarLengthArray<SQLTCHAR> &result, const QString &input)
+{
+ const auto u32 = input.toUcs4();
+ do_append(result, u32);
+}
+
inline static QVarLengthArray<SQLTCHAR> toSQLTCHAR(const QString &input)
{
QVarLengthArray<SQLTCHAR> result;
- result.resize(input.size());
- switch(sizeof(SQLTCHAR)) {
- case 1:
- memcpy(result.data(), input.toUtf8().data(), input.size());
- break;
- case 2:
- memcpy(result.data(), input.unicode(), input.size() * 2);
- break;
- case 4:
- memcpy(result.data(), input.toUcs4().data(), input.size() * 4);
- break;
- default:
- qCritical("sizeof(SQLTCHAR) is %d. Don't know how to handle this.", int(sizeof(SQLTCHAR)));
- }
+ toSQLTCHARImpl(result, input);
result.append(0); // make sure it's null terminated, doesn't matter if it already is, it does if it isn't.
return result;
}
--- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
+++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
@@ -1740,10 +1740,11 @@ bool QODBCResult::exec()
case QMetaType::QString:
if (d->unicode) {
if (bindValueType(i) & QSql::Out) {
- const QByteArray &first = tmpStorage.at(i);
- QVarLengthArray<SQLTCHAR> array;
- array.append((const SQLTCHAR *)first.constData(), first.size());
- values[i] = fromSQLTCHAR(array, first.size()/sizeof(SQLTCHAR));
+ const QByteArray &bytes = tmpStorage.at(i);
+ const auto strSize = bytes.size() / sizeof(SQLTCHAR);
+ QVarLengthArray<SQLTCHAR> string(strSize);
+ memcpy(string.data(), bytes.data(), strSize * sizeof(SQLTCHAR));
+ values[i] = fromSQLTCHAR(string);
}
break;
}
--- a/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
+++ b/src/plugins/sqldrivers/odbc/qsql_odbc.cpp
@@ -745,6 +745,14 @@ QChar QODBCDriverPrivate::quoteChar()
return quote;
}
+static SQLRETURN qt_string_SQLSetConnectAttr(SQLHDBC handle, SQLINTEGER attr, const QString &val)
+{
+ auto encoded = toSQLTCHAR(val);
+ return SQLSetConnectAttr(handle, attr,
+ encoded.data(),
+ SQLINTEGER(encoded.size() * sizeof(SQLTCHAR))); // size in bytes
+}
+
bool QODBCDriverPrivate::setConnectionOptions(const QString& connOpts)
{
@@ -780,10 +788,7 @@ bool QODBCDriverPrivate::setConnectionOptions(const QString& connOpts)
v = val.toUInt();
r = SQLSetConnectAttr(hDbc, SQL_ATTR_LOGIN_TIMEOUT, (SQLPOINTER) size_t(v), 0);
} else if (opt.toUpper() == "SQL_ATTR_CURRENT_CATALOG"_L1) {
- val.utf16(); // 0 terminate
- r = SQLSetConnectAttr(hDbc, SQL_ATTR_CURRENT_CATALOG,
- toSQLTCHAR(val).data(),
- SQLINTEGER(val.length() * sizeof(SQLTCHAR)));
+ r = qt_string_SQLSetConnectAttr(hDbc, SQL_ATTR_CURRENT_CATALOG, val);
} else if (opt.toUpper() == "SQL_ATTR_METADATA_ID"_L1) {
if (val.toUpper() == "SQL_TRUE"_L1) {
v = SQL_TRUE;
@@ -798,10 +803,7 @@ bool QODBCDriverPrivate::setConnectionOptions(const QString& connOpts)
v = val.toUInt();
r = SQLSetConnectAttr(hDbc, SQL_ATTR_PACKET_SIZE, (SQLPOINTER) size_t(v), 0);
} else if (opt.toUpper() == "SQL_ATTR_TRACEFILE"_L1) {
- val.utf16(); // 0 terminate
- r = SQLSetConnectAttr(hDbc, SQL_ATTR_TRACEFILE,
- toSQLTCHAR(val).data(),
- SQLINTEGER(val.length() * sizeof(SQLTCHAR)));
+ r = qt_string_SQLSetConnectAttr(hDbc, SQL_ATTR_TRACEFILE, val);
} else if (opt.toUpper() == "SQL_ATTR_TRACE"_L1) {
if (val.toUpper() == "SQL_OPT_TRACE_OFF"_L1) {
v = SQL_OPT_TRACE_OFF;
@@ -1004,9 +1006,12 @@ bool QODBCResult::reset (const QString& query)
return false;
}
- r = SQLExecDirect(d->hStmt,
- toSQLTCHAR(query).data(),
- (SQLINTEGER) query.length());
+ {
+ auto encoded = toSQLTCHAR(query);
+ r = SQLExecDirect(d->hStmt,
+ encoded.data(),
+ SQLINTEGER(encoded.size()));
+ }
if (r != SQL_SUCCESS && r != SQL_SUCCESS_WITH_INFO && r!= SQL_NO_DATA) {
setLastError(qMakeError(QCoreApplication::translate("QODBCResult",
"Unable to execute statement"), QSqlError::StatementError, d));
@@ -1355,9 +1360,12 @@ bool QODBCResult::prepare(const QString& query)
return false;
}
- r = SQLPrepare(d->hStmt,
- toSQLTCHAR(query).data(),
- (SQLINTEGER) query.length());
+ {
+ auto encoded = toSQLTCHAR(query);
+ r = SQLPrepare(d->hStmt,
+ encoded.data(),
+ SQLINTEGER(encoded.size()));
+ }
if (r != SQL_SUCCESS) {
setLastError(qMakeError(QCoreApplication::translate("QODBCResult",
@@ -1385,7 +1393,7 @@ bool QODBCResult::exec()
SQLCloseCursor(d->hStmt);
QVariantList &values = boundValues();
- QByteArrayList tmpStorage(values.count(), QByteArray()); // holds temporary buffers
+ QByteArrayList tmpStorage(values.count(), QByteArray()); // targets for SQLBindParameter()
QVarLengthArray<SQLLEN, 32> indicators(values.count());
memset(indicators.data(), 0, indicators.size() * sizeof(SQLLEN));
@@ -1600,36 +1608,36 @@ bool QODBCResult::exec()
case QMetaType::QString:
if (d->unicode) {
QByteArray &ba = tmpStorage[i];
- QString str = val.toString();
+ {
+ const auto encoded = toSQLTCHAR(val.toString());
+ ba = QByteArray(reinterpret_cast<const char *>(encoded.data()),
+ encoded.size() * sizeof(SQLTCHAR));
+ }
+
if (*ind != SQL_NULL_DATA)
- *ind = str.length() * sizeof(SQLTCHAR);
- const qsizetype strSize = str.length() * sizeof(SQLTCHAR);
+ *ind = ba.size();
if (bindValueType(i) & QSql::Out) {
- const QVarLengthArray<SQLTCHAR> a(toSQLTCHAR(str));
- ba = QByteArray((const char *)a.constData(), int(a.size() * sizeof(SQLTCHAR)));
r = SQLBindParameter(d->hStmt,
i + 1,
qParamType[bindValueType(i) & QSql::InOut],
SQL_C_TCHAR,
- strSize > 254 ? SQL_WLONGVARCHAR : SQL_WVARCHAR,
+ ba.size() > 254 ? SQL_WLONGVARCHAR : SQL_WVARCHAR,
0, // god knows... don't change this!
0,
- ba.data(),
+ const_cast<char *>(ba.constData()), // don't detach
ba.size(),
ind);
break;
}
- ba = QByteArray(reinterpret_cast<const char *>(toSQLTCHAR(str).constData()),
- int(strSize));
r = SQLBindParameter(d->hStmt,
i + 1,
qParamType[bindValueType(i) & QSql::InOut],
SQL_C_TCHAR,
- strSize > 254 ? SQL_WLONGVARCHAR : SQL_WVARCHAR,
- strSize,
+ ba.size() > 254 ? SQL_WLONGVARCHAR : SQL_WVARCHAR,
+ ba.size(),
0,
- const_cast<char *>(ba.constData()),
+ const_cast<char *>(ba.constData()), // don't detach
ba.size(),
ind);
break;
@@ -1991,14 +1999,16 @@ bool QODBCDriver::open(const QString & db,
SQLSMALLINT cb;
QVarLengthArray<SQLTCHAR> connOut(1024);
memset(connOut.data(), 0, connOut.size() * sizeof(SQLTCHAR));
- r = SQLDriverConnect(d->hDbc,
- NULL,
- toSQLTCHAR(connQStr).data(),
- (SQLSMALLINT)connQStr.length(),
- connOut.data(),
- 1024,
- &cb,
- /*SQL_DRIVER_NOPROMPT*/0);
+ {
+ auto encoded = toSQLTCHAR(connQStr);
+ r = SQLDriverConnect(d->hDbc,
+ nullptr,
+ encoded.data(), SQLSMALLINT(encoded.size()),
+ connOut.data(),
+ 1024,
+ &cb,
+ /*SQL_DRIVER_NOPROMPT*/0);
+ }
if (r != SQL_SUCCESS && r != SQL_SUCCESS_WITH_INFO) {
setLastError(qMakeError(tr("Unable to connect"), QSqlError::ConnectionError, d));
@@ -2377,17 +2387,15 @@ QStringList QODBCDriver::tables(QSql::TableType type) const
if (tableType.isEmpty())
return tl;
- QString joinedTableTypeString = tableType.join(u',');
+ {
+ auto joinedTableTypeString = toSQLTCHAR(tableType.join(u','));
- r = SQLTables(hStmt,
- NULL,
- 0,
- NULL,
- 0,
- NULL,
- 0,
- toSQLTCHAR(joinedTableTypeString).data(),
- joinedTableTypeString.length() /* characters, not bytes */);
+ r = SQLTables(hStmt,
+ nullptr, 0,
+ nullptr, 0,
+ nullptr, 0,
+ joinedTableTypeString.data(), joinedTableTypeString.size());
+ }
if (r != SQL_SUCCESS)
qSqlWarning("QODBCDriver::tables Unable to execute table list"_L1, d);
@@ -2460,28 +2468,30 @@ QSqlIndex QODBCDriver::primaryIndex(const QString& tablename) const
SQL_ATTR_CURSOR_TYPE,
(SQLPOINTER)SQL_CURSOR_FORWARD_ONLY,
SQL_IS_UINTEGER);
- r = SQLPrimaryKeys(hStmt,
- catalog.length() == 0 ? NULL : toSQLTCHAR(catalog).data(),
- catalog.length(),
- schema.length() == 0 ? NULL : toSQLTCHAR(schema).data(),
- schema.length(),
- toSQLTCHAR(table).data(),
- table.length() /* in characters, not in bytes */);
+ {
+ auto c = toSQLTCHAR(catalog);
+ auto s = toSQLTCHAR(schema);
+ auto t = toSQLTCHAR(table);
+ r = SQLPrimaryKeys(hStmt,
+ catalog.isEmpty() ? nullptr : c.data(), c.size(),
+ schema.isEmpty() ? nullptr : s.data(), s.size(),
+ t.data(), t.size());
+ }
// if the SQLPrimaryKeys() call does not succeed (e.g the driver
// does not support it) - try an alternative method to get hold of
// the primary index (e.g MS Access and FoxPro)
if (r != SQL_SUCCESS) {
- r = SQLSpecialColumns(hStmt,
- SQL_BEST_ROWID,
- catalog.length() == 0 ? NULL : toSQLTCHAR(catalog).data(),
- catalog.length(),
- schema.length() == 0 ? NULL : toSQLTCHAR(schema).data(),
- schema.length(),
- toSQLTCHAR(table).data(),
- table.length(),
- SQL_SCOPE_CURROW,
- SQL_NULLABLE);
+ auto c = toSQLTCHAR(catalog);
+ auto s = toSQLTCHAR(schema);
+ auto t = toSQLTCHAR(table);
+ r = SQLSpecialColumns(hStmt,
+ SQL_BEST_ROWID,
+ catalog.isEmpty() ? nullptr : c.data(), c.size(),
+ schema.isEmpty() ? nullptr : s.data(), s.size(),
+ t.data(), t.size(),
+ SQL_SCOPE_CURROW,
+ SQL_NULLABLE);
if (r != SQL_SUCCESS) {
qSqlWarning("QODBCDriver::primaryIndex: Unable to execute primary key list"_L1, d);
@@ -2562,15 +2572,17 @@ QSqlRecord QODBCDriver::record(const QString& tablename) const
SQL_ATTR_CURSOR_TYPE,
(SQLPOINTER)SQL_CURSOR_FORWARD_ONLY,
SQL_IS_UINTEGER);
- r = SQLColumns(hStmt,
- catalog.length() == 0 ? NULL : toSQLTCHAR(catalog).data(),
- catalog.length(),
- schema.length() == 0 ? NULL : toSQLTCHAR(schema).data(),
- schema.length(),
- toSQLTCHAR(table).data(),
- table.length(),
- NULL,
- 0);
+ {
+ auto c = toSQLTCHAR(catalog);
+ auto s = toSQLTCHAR(schema);
+ auto t = toSQLTCHAR(table);
+ r = SQLColumns(hStmt,
+ catalog.isEmpty() ? nullptr : c.data(), c.size(),
+ schema.isEmpty() ? nullptr : s.data(), s.size(),
+ t.data(), t.size(),
+ nullptr,
+ 0);
+ }
if (r != SQL_SUCCESS)
qSqlWarning("QODBCDriver::record: Unable to execute column list"_L1, d);
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