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Security Fix | Prohibit DtdProcessing on XmlTextReader instance in .NET Core #884

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Jan 18, 2021
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Security Fix | Prohibit DtdProcessing on XmlTextReader instance in .NET Core #884

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4 changes: 2 additions & 2 deletions src/Microsoft.Data.SqlClient/netcore/src/Microsoft/Data/SqlClient/SqlDependencyListener.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1155,8 +1155,8 @@ internal static SqlNotification ProcessMessage(SqlXml xmlMessage)
return null;
}

// Create a new XmlTextReader on the Message node value.
using (XmlTextReader xmlMessageReader = new XmlTextReader(xmlReader.Value, XmlNodeType.Element, null))
// Create a new XmlTextReader on the Message node value. Prohibit DTD processing when dealing with untrusted sources.
using (XmlTextReader xmlMessageReader = new XmlTextReader(xmlReader.Value, XmlNodeType.Element, null) { DtdProcessing = DtdProcessing.Prohibit })
{
// Proceed to the Text Node.
if (!xmlMessageReader.Read())
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