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saml: Safer DocumentBuilderFactory and ParserPool configuration
This implements safer DocumentBuilderFactory and ParserPool utilities to be used throughout the codebase to prevent potential XXE exploits. References: https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html https://www.blackhat.com/docs/us-15/materials/us-15-Wang-FileCry-The-New-Age-Of-XXE-java-wp.pdf Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com> (cherry picked from commit 8e0e68ef368ebe2793ef80e2c3821eaecb47b593) Signed-off-by: Rohit Yadav <rohit.yadav@shapeblue.com>
This commit is contained in:
Rohit Yadav
parent
c56220fcf2
commit
f27de63644
@ -31,6 +31,7 @@
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<dependency>
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<groupId>org.opensaml</groupId>
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<artifactId>opensaml</artifactId>
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<version>${cs.opensaml.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.cloudstack</groupId>
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@ -30,6 +30,7 @@ import org.apache.cloudstack.api.auth.PluggableAPIAuthenticator;
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import org.apache.cloudstack.api.response.SAMLMetaDataResponse;
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import org.apache.cloudstack.saml.SAML2AuthManager;
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import org.apache.cloudstack.saml.SAMLProviderMetadata;
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import org.apache.cloudstack.utils.security.ParserUtils;
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import org.apache.log4j.Logger;
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import org.opensaml.Configuration;
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import org.opensaml.DefaultBootstrap;
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@ -239,7 +240,7 @@ public class GetServiceProviderMetaDataCmd extends BaseCmd implements APIAuthent
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StringWriter stringWriter = new StringWriter();
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try {
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DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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DocumentBuilderFactory factory = ParserUtils.getSaferDocumentBuilderFactory();
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DocumentBuilder builder = factory.newDocumentBuilder();
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Document document = builder.newDocument();
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Marshaller out = Configuration.getMarshallerFactory().getMarshaller(spEntityDescriptor);
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@ -78,7 +78,6 @@ import org.opensaml.saml2.metadata.provider.HTTPMetadataProvider;
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import org.opensaml.saml2.metadata.provider.MetadataProviderException;
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import org.opensaml.xml.ConfigurationException;
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import org.opensaml.xml.XMLObject;
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import org.opensaml.xml.parse.BasicParserPool;
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import org.opensaml.xml.security.credential.UsageType;
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import org.opensaml.xml.security.keyinfo.KeyInfoHelper;
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import org.springframework.stereotype.Component;
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@ -389,7 +388,7 @@ public class SAML2AuthManagerImpl extends AdapterBase implements SAML2AuthManage
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}
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}
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_idpMetaDataProvider.setRequireValidMetadata(true);
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_idpMetaDataProvider.setParserPool(new BasicParserPool());
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_idpMetaDataProvider.setParserPool(SAMLUtils.getSaferParserPool());
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_idpMetaDataProvider.initialize();
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_timer.scheduleAtFixedRate(new MetadataRefreshTask(), 0, _refreshInterval * 1000);
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@ -42,12 +42,15 @@ import java.security.cert.X509Certificate;
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import java.security.spec.InvalidKeySpecException;
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import java.security.spec.PKCS8EncodedKeySpec;
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import java.security.spec.X509EncodedKeySpec;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.zip.Deflater;
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import java.util.zip.DeflaterOutputStream;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServletResponse;
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import javax.xml.XMLConstants;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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@ -56,6 +59,7 @@ import javax.xml.stream.FactoryConfigurationError;
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import org.apache.cloudstack.api.ApiConstants;
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import org.apache.cloudstack.api.response.LoginCmdResponse;
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import org.apache.cloudstack.utils.security.CertUtils;
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import org.apache.cloudstack.utils.security.ParserUtils;
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import org.apache.log4j.Logger;
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import org.bouncycastle.operator.OperatorCreationException;
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import org.joda.time.DateTime;
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@ -88,6 +92,7 @@ import org.opensaml.xml.io.MarshallingException;
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import org.opensaml.xml.io.Unmarshaller;
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import org.opensaml.xml.io.UnmarshallerFactory;
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import org.opensaml.xml.io.UnmarshallingException;
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import org.opensaml.xml.parse.BasicParserPool;
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import org.opensaml.xml.signature.SignatureConstants;
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import org.opensaml.xml.util.Base64;
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import org.opensaml.xml.util.XMLHelper;
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@ -230,7 +235,7 @@ public class SAMLUtils {
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public static Response decodeSAMLResponse(String responseMessage)
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throws ConfigurationException, ParserConfigurationException,
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SAXException, IOException, UnmarshallingException {
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DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
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DocumentBuilderFactory documentBuilderFactory = ParserUtils.getSaferDocumentBuilderFactory();
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documentBuilderFactory.setNamespaceAware(true);
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DocumentBuilder docBuilder = documentBuilderFactory.newDocumentBuilder();
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byte[] base64DecodedResponse = Base64.decode(responseMessage);
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@ -364,4 +369,19 @@ public class SAMLUtils {
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"CN=ApacheCloudStack", "CN=ApacheCloudStack",
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3, "SHA256WithRSA");
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}
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public static BasicParserPool getSaferParserPool() {
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final Map<String, Boolean> features = new HashMap<>();
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features.put(XMLConstants.FEATURE_SECURE_PROCESSING, true);
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features.put("http://apache.org/xml/features/disallow-doctype-decl", true);
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features.put("http://xml.org/sax/features/external-general-entities", false);
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features.put("http://xml.org/sax/features/external-parameter-entities", false);
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features.put("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
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final BasicParserPool parserPool = new BasicParserPool();
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parserPool.setXincludeAware(false);
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parserPool.setIgnoreComments(true);
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parserPool.setExpandEntityReferences(false);
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parserPool.setBuilderFeatures(features);
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return parserPool;
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}
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}
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2
pom.xml
2
pom.xml
@ -163,7 +163,7 @@
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<cs.mysql.version>8.0.19</cs.mysql.version>
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<cs.neethi.version>2.0.4</cs.neethi.version>
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<cs.nitro.version>10.1</cs.nitro.version>
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<cs.opensaml.version>2.6.4</cs.opensaml.version>
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<cs.opensaml.version>2.6.6</cs.opensaml.version>
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<cs.rados-java.version>0.6.0</cs.rados-java.version>
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<cs.java-linstor.version>0.3.0</cs.java-linstor.version>
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<cs.reflections.version>0.9.12</cs.reflections.version>
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@ -0,0 +1,41 @@
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// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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package org.apache.cloudstack.utils.security;
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import javax.xml.XMLConstants;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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public class ParserUtils {
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public static DocumentBuilderFactory getSaferDocumentBuilderFactory() throws ParserConfigurationException {
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DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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// REDHAT https://www.blackhat.com/docs/us-15/materials/us-15-Wang-FileCry-The-New-Age-Of-XXE-java-wp.pdf
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// OWASP https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html
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// and these as well, per Timothy Morgan's 2014 paper: "XML Schema, DTD, and Entity Attacks"
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factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
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factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
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factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
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factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
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factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
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factory.setXIncludeAware(false);
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factory.setExpandEntityReferences(false);
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return factory;
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}
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}
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