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openSUSE:Step:15-SP4
log4j.22206
CVE-2021-44228.patch
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File CVE-2021-44228.patch of Package log4j.22206
Index: apache-log4j-2.13.0-src/log4j-core/pom.xml =================================================================== --- apache-log4j-2.13.0-src.orig/log4j-core/pom.xml 2021-12-10 15:01:38.578043969 +0100 +++ apache-log4j-2.13.0-src/log4j-core/pom.xml 2021-12-10 15:01:40.494006955 +0100 @@ -333,6 +333,11 @@ <artifactId>HdrHistogram</artifactId> <scope>test</scope> </dependency> + <dependency> + <groupId>org.zapodot</groupId> + <artifactId>embedded-ldap-junit</artifactId> + <scope>test</scope> + </dependency> </dependencies> <build> <plugins> Index: apache-log4j-2.13.0-src/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/mom/JmsAppender.java =================================================================== --- apache-log4j-2.13.0-src.orig/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/mom/JmsAppender.java 2021-12-10 15:01:38.578043969 +0100 +++ apache-log4j-2.13.0-src/log4j-core/src/main/java/org/apache/logging/log4j/core/appender/mom/JmsAppender.java 2021-12-10 15:01:40.494006955 +0100 @@ -88,6 +88,15 @@ public class JmsAppender extends Abstrac @PluginBuilderAttribute private boolean immediateFail; + @PluginBuilderAttribute + private String allowedLdapClasses; + + @PluginBuilderAttribute + private String allowedLdapHosts; + + @PluginBuilderAttribute + private String allowedJndiProtocols; + // Programmatic access only for now. private JmsManager jmsManager; @@ -100,8 +109,21 @@ public class JmsAppender extends Abstrac JmsManager actualJmsManager = jmsManager; JmsManagerConfiguration configuration = null; if (actualJmsManager == null) { + Properties additionalProperties = null; + if (allowedLdapClasses != null || allowedLdapHosts != null) { + additionalProperties = new Properties(); + if (allowedLdapHosts != null) { + additionalProperties.put(JndiManager.ALLOWED_HOSTS, allowedLdapHosts); + } + if (allowedLdapClasses != null) { + additionalProperties.put(JndiManager.ALLOWED_CLASSES, allowedLdapClasses); + } + if (allowedJndiProtocols != null) { + additionalProperties.put(JndiManager.ALLOWED_PROTOCOLS, allowedJndiProtocols); + } + } final Properties jndiProperties = JndiManager.createProperties(factoryName, providerUrl, urlPkgPrefixes, - securityPrincipalName, securityCredentials, null); + securityPrincipalName, securityCredentials, additionalProperties); configuration = new JmsManagerConfiguration(jndiProperties, factoryBindingName, destinationBindingName, userName, password, false, reconnectIntervalMillis); actualJmsManager = AbstractManager.getManager(getName(), JmsManager.FACTORY, configuration); @@ -202,6 +224,21 @@ public class JmsAppender extends Abstrac return this; } + public Builder setAllowedLdapClasses(final String allowedLdapClasses) { + this.allowedLdapClasses = allowedLdapClasses; + return this; + } + + public Builder setAllowedLdapHosts(final String allowedLdapHosts) { + this.allowedLdapHosts = allowedLdapHosts; + return this; + } + + public Builder setAllowedJndiProtocols(final String allowedJndiProtocols) { + this.allowedJndiProtocols = allowedJndiProtocols; + return this; + } + /** * Does not include the password. */ @@ -212,7 +249,8 @@ public class JmsAppender extends Abstrac + ", securityCredentials=" + securityCredentials + ", factoryBindingName=" + factoryBindingName + ", destinationBindingName=" + destinationBindingName + ", username=" + userName + ", layout=" + getLayout() + ", filter=" + getFilter() + ", ignoreExceptions=" + isIgnoreExceptions() - + ", jmsManager=" + jmsManager + "]"; + + ", jmsManager=" + jmsManager + ", allowedLdapClasses=" + allowedLdapClasses + + ", allowedLdapHosts=" + allowedLdapHosts + ", allowedJndiProtocols=" + allowedJndiProtocols + "]"; } } Index: apache-log4j-2.13.0-src/log4j-core/src/main/java/org/apache/logging/log4j/core/net/JndiManager.java =================================================================== --- apache-log4j-2.13.0-src.orig/log4j-core/src/main/java/org/apache/logging/log4j/core/net/JndiManager.java 2021-12-10 15:01:38.578043969 +0100 +++ apache-log4j-2.13.0-src/log4j-core/src/main/java/org/apache/logging/log4j/core/net/JndiManager.java 2021-12-10 15:01:40.494006955 +0100 @@ -17,31 +17,69 @@ package org.apache.logging.log4j.core.net; +import java.net.URI; +import java.net.URISyntaxException; +import java.util.ArrayList; +import java.util.Arrays; +import java.util.HashMap; +import java.util.List; +import java.util.Locale; +import java.util.Map; import java.util.Properties; import java.util.concurrent.TimeUnit; import javax.naming.Context; -import javax.naming.InitialContext; +import javax.naming.NamingEnumeration; import javax.naming.NamingException; +import javax.naming.directory.Attribute; +import javax.naming.directory.Attributes; +import javax.naming.directory.DirContext; +import javax.naming.directory.InitialDirContext; import org.apache.logging.log4j.core.appender.AbstractManager; import org.apache.logging.log4j.core.appender.ManagerFactory; import org.apache.logging.log4j.core.util.JndiCloser; +import org.apache.logging.log4j.core.util.NetUtils; +import org.apache.logging.log4j.util.PropertiesUtil; /** - * Manages a JNDI {@link javax.naming.Context}. + * Manages a JNDI {@link javax.naming.directory.DirContext}. * * @since 2.1 */ public class JndiManager extends AbstractManager { + public static final String ALLOWED_HOSTS = "allowedLdapHosts"; + public static final String ALLOWED_CLASSES = "allowedLdapClasses"; + public static final String ALLOWED_PROTOCOLS = "allowedJndiProtocols"; + private static final JndiManagerFactory FACTORY = new JndiManagerFactory(); + private static final String PREFIX = "log4j2."; + private static final String LDAP = "ldap"; + private static final String LDAPS = "ldaps"; + private static final String JAVA = "java"; + private static final List<String> permanentAllowedHosts = NetUtils.getLocalIps(); + private static final List<String> permanentAllowedClasses = Arrays.asList(Boolean.class.getName(), + Byte.class.getName(), Character.class.getName(), Double.class.getName(), Float.class.getName(), + Integer.class.getName(), Long.class.getName(), Short.class.getName(), String.class.getName()); + private static final List<String> permanentAllowedProtocols = Arrays.asList(JAVA, LDAP, LDAPS); + private static final String SERIALIZED_DATA = "javaSerializedData"; + private static final String CLASS_NAME = "javaClassName"; + private static final String REFERENCE_ADDRESS = "javaReferenceAddress"; + private static final String OBJECT_FACTORY = "javaFactory"; + private final List<String> allowedHosts; + private final List<String> allowedClasses; + private final List<String> allowedProtocols; - private final Context context; + private final DirContext context; - private JndiManager(final String name, final Context context) { + private JndiManager(final String name, final DirContext context, final List<String> allowedHosts, + final List<String> allowedClasses, final List<String> allowedProtocols) { super(null, name); this.context = context; + this.allowedHosts = allowedHosts; + this.allowedClasses = allowedClasses; + this.allowedProtocols = allowedProtocols; } /** @@ -168,7 +206,54 @@ public class JndiManager extends Abstrac * @throws NamingException if a naming exception is encountered */ @SuppressWarnings("unchecked") - public <T> T lookup(final String name) throws NamingException { + public synchronized <T> T lookup(final String name) throws NamingException { + try { + URI uri = new URI(name); + if (uri.getScheme() != null) { + if (!allowedProtocols.contains(uri.getScheme().toLowerCase(Locale.ROOT))) { + LOGGER.warn("Log4j JNDI does not allow protocol {}", uri.getScheme()); + return null; + } + if (LDAP.equalsIgnoreCase(uri.getScheme()) || LDAPS.equalsIgnoreCase(uri.getScheme())) { + if (!allowedHosts.contains(uri.getHost())) { + LOGGER.warn("Attempt to access ldap server not in allowed list"); + return null; + } + Attributes attributes = this.context.getAttributes(name); + if (attributes != null) { + // In testing the "key" for attributes seems to be lowercase while the attribute id is + // camelcase, but that may just be true for the test LDAP used here. This copies the Attributes + // to a Map ignoring the "key" and using the Attribute's id as the key in the Map so it matches + // the Java schema. + Map<String, Attribute> attributeMap = new HashMap<>(); + NamingEnumeration<? extends Attribute> enumeration = attributes.getAll(); + while (enumeration.hasMore()) { + Attribute attribute = enumeration.next(); + attributeMap.put(attribute.getID(), attribute); + } + Attribute classNameAttr = attributeMap.get(CLASS_NAME); + if (attributeMap.get(SERIALIZED_DATA) != null) { + if (classNameAttr != null) { + String className = classNameAttr.get().toString(); + if (!allowedClasses.contains(className)) { + LOGGER.warn("Deserialization of {} is not allowed", className); + return null; + } + } else { + LOGGER.warn("No class name provided for {}", name); + return null; + } + } else if (attributeMap.get(REFERENCE_ADDRESS) != null + || attributeMap.get(OBJECT_FACTORY) != null) { + LOGGER.warn("Referenceable class is not allowed for {}", name); + return null; + } + } + } + } + } catch (URISyntaxException ex) { + // This is OK. + } return (T) this.context.lookup(name); } @@ -176,13 +261,36 @@ public class JndiManager extends Abstrac @Override public JndiManager createManager(final String name, final Properties data) { + String hosts = data != null ? data.getProperty(ALLOWED_HOSTS) : null; + String classes = data != null ? data.getProperty(ALLOWED_CLASSES) : null; + String protocols = data != null ? data.getProperty(ALLOWED_PROTOCOLS) : null; + List<String> allowedHosts = new ArrayList<>(); + List<String> allowedClasses = new ArrayList<>(); + List<String> allowedProtocols = new ArrayList<>(); + addAll(hosts, allowedHosts, permanentAllowedHosts, ALLOWED_HOSTS, data); + addAll(classes, allowedClasses, permanentAllowedClasses, ALLOWED_CLASSES, data); + addAll(protocols, allowedProtocols, permanentAllowedProtocols, ALLOWED_PROTOCOLS, data); try { - return new JndiManager(name, new InitialContext(data)); + return new JndiManager(name, new InitialDirContext(data), allowedHosts, allowedClasses, + allowedProtocols); } catch (final NamingException e) { LOGGER.error("Error creating JNDI InitialContext.", e); return null; } } + + private void addAll(String toSplit, List<String> list, List<String> permanentList, String propertyName, + Properties data) { + if (toSplit != null) { + list.addAll(Arrays.asList(toSplit.split("\\s*,\\s*"))); + data.remove(propertyName); + } + toSplit = PropertiesUtil.getProperties().getStringProperty(PREFIX + propertyName); + if (toSplit != null) { + list.addAll(Arrays.asList(toSplit.split("\\s*,\\s*"))); + } + list.addAll(permanentList); + } } @Override Index: apache-log4j-2.13.0-src/log4j-core/src/main/java/org/apache/logging/log4j/core/util/NetUtils.java =================================================================== --- apache-log4j-2.13.0-src.orig/log4j-core/src/main/java/org/apache/logging/log4j/core/util/NetUtils.java 2021-12-10 15:01:38.578043969 +0100 +++ apache-log4j-2.13.0-src/log4j-core/src/main/java/org/apache/logging/log4j/core/util/NetUtils.java 2021-12-10 15:01:40.494006955 +0100 @@ -17,6 +17,8 @@ package org.apache.logging.log4j.core.util; import java.io.File; +import java.net.Inet4Address; +import java.net.Inet6Address; import java.net.InetAddress; import java.net.MalformedURLException; import java.net.NetworkInterface; @@ -25,11 +27,14 @@ import java.net.URI; import java.net.URISyntaxException; import java.net.URL; import java.net.UnknownHostException; +import java.util.ArrayList; import java.util.Arrays; import java.util.Enumeration; +import java.util.List; import org.apache.logging.log4j.Logger; import org.apache.logging.log4j.status.StatusLogger; +import org.apache.logging.log4j.util.Strings; /** * Networking-related convenience methods. @@ -78,6 +83,49 @@ public final class NetUtils { } } + /** + * Returns all the local host names and ip addresses. + * @return The local host names and ip addresses. + */ + public static List<String> getLocalIps() { + List<String> localIps = new ArrayList<>(); + localIps.add("localhost"); + localIps.add("127.0.0.1"); + try { + final InetAddress addr = Inet4Address.getLocalHost(); + setHostName(addr, localIps); + } catch (final UnknownHostException ex) { + // Ignore this. + } + try { + final Enumeration<NetworkInterface> interfaces = NetworkInterface.getNetworkInterfaces(); + if (interfaces != null) { + while (interfaces.hasMoreElements()) { + final NetworkInterface nic = interfaces.nextElement(); + final Enumeration<InetAddress> addresses = nic.getInetAddresses(); + while (addresses.hasMoreElements()) { + final InetAddress address = addresses.nextElement(); + setHostName(address, localIps); + } + } + } + } catch (final SocketException se) { + // ignore. + } + return localIps; + } + + private static void setHostName(InetAddress address, List<String> localIps) { + String[] parts = address.toString().split("\\s*/\\s*"); + if (parts.length > 0) { + for (String part : parts) { + if (Strings.isNotBlank(part) && !localIps.contains(part)) { + localIps.add(part); + } + } + } + } + /** * Returns the local network interface's MAC address if possible. The local network interface is defined here as * the {@link java.net.NetworkInterface} that is both up and not a loopback interface. Index: apache-log4j-2.13.0-src/log4j-core/src/test/java/org/apache/logging/log4j/core/lookup/JndiExploit.java =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ apache-log4j-2.13.0-src/log4j-core/src/test/java/org/apache/logging/log4j/core/lookup/JndiExploit.java 2021-12-10 15:01:40.494006955 +0100 @@ -0,0 +1,36 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache license, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the license for the specific language governing permissions and + * limitations under the license. + */ +package org.apache.logging.log4j.core.lookup; + +import javax.naming.Context; +import javax.naming.Name; +import javax.naming.spi.ObjectFactory; +import java.util.Hashtable; + +import static org.junit.jupiter.api.Assertions.fail; + +/** + * Test LDAP object + */ +public class JndiExploit implements ObjectFactory { + @Override + public Object getObjectInstance(Object obj, Name name, Context nameCtx, Hashtable<?, ?> environment) + throws Exception { + fail("getObjectInstance must not be allowed"); + return null; + } +} Index: apache-log4j-2.13.0-src/log4j-core/src/test/java/org/apache/logging/log4j/core/lookup/JndiRestrictedLookupTest.java =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ apache-log4j-2.13.0-src/log4j-core/src/test/java/org/apache/logging/log4j/core/lookup/JndiRestrictedLookupTest.java 2021-12-10 15:01:40.494006955 +0100 @@ -0,0 +1,144 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache license, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the license for the specific language governing permissions and + * limitations under the license. + */ +package org.apache.logging.log4j.core.lookup; + +import javax.naming.Context; +import javax.naming.NamingException; +import javax.naming.Reference; +import javax.naming.Referenceable; +import javax.naming.StringRefAddr; + +import org.apache.logging.log4j.Level; +import org.apache.logging.log4j.message.SimpleMessage; +import org.junit.BeforeClass; +import org.junit.Rule; +import org.junit.Test; +import org.zapodot.junit.ldap.EmbeddedLdapRule; +import org.zapodot.junit.ldap.EmbeddedLdapRuleBuilder; + +import static org.junit.Assert.assertEquals; +import static org.junit.Assert.fail; + +/** + * JndiLookupTest + */ +public class JndiRestrictedLookupTest { + + private static final String LDAP_URL = "ldap://127.0.0.1:"; + private static final String RESOURCE = "JndiExploit"; + private static final String TEST_STRING = "TestString"; + private static final String TEST_MESSAGE = "TestMessage"; + private static final String LEVEL = "TestLevel"; + private static final String DOMAIN_DSN = "dc=apache,dc=org"; + private static final String DOMAIN = "apache.org"; + + @Rule + public EmbeddedLdapRule embeddedLdapRule = EmbeddedLdapRuleBuilder.newInstance().usingDomainDsn(DOMAIN_DSN) + .importingLdifs("JndiRestrictedLookup.ldif").build(); + + @BeforeClass + public static void beforeClass() { + System.setProperty("log4j2.allowedLdapClasses", Level.class.getName()); + System.setProperty("log4j2.allowedJndiProtocols", "dns"); + } + + @Test + public void testReferenceLookup() throws Exception { + int port = embeddedLdapRule.embeddedServerPort(); + Context context = embeddedLdapRule.context(); + context.bind( "cn=" + RESOURCE +"," + DOMAIN_DSN, new Fruit("Test Message")); + final StrLookup lookup = new JndiLookup(); + String result = lookup.lookup(LDAP_URL + port + "/" + "cn=" + RESOURCE + "," + DOMAIN_DSN); + if (result != null) { + fail("Lookup returned an object"); + } + } + + @Test + public void testSerializableLookup() throws Exception { + int port = embeddedLdapRule.embeddedServerPort(); + Context context = embeddedLdapRule.context(); + context.bind( "cn=" + TEST_STRING +"," + DOMAIN_DSN, "Test Message"); + final StrLookup lookup = new JndiLookup(); + String result = lookup.lookup(LDAP_URL + port + "/" + "cn=" + TEST_STRING + "," + DOMAIN_DSN); + if (result == null) { + fail("Lookup failed to return the test string"); + } + assertEquals("Incorrect message returned", "Test Message", result); + } + + @Test + public void testBadSerializableLookup() throws Exception { + int port = embeddedLdapRule.embeddedServerPort(); + Context context = embeddedLdapRule.context(); + context.bind( "cn=" + TEST_MESSAGE +"," + DOMAIN_DSN, new SimpleMessage("Test Message")); + final StrLookup lookup = new JndiLookup(); + String result = lookup.lookup(LDAP_URL + port + "/" + "cn=" + TEST_MESSAGE + "," + DOMAIN_DSN); + if (result != null) { + fail("Lookup returned an object"); + } + } + + @Test + public void testSpecialSerializableLookup() throws Exception { + int port = embeddedLdapRule.embeddedServerPort(); + Context context = embeddedLdapRule.context(); + context.bind( "cn=" + LEVEL +"," + DOMAIN_DSN, Level.ERROR); + final StrLookup lookup = new JndiLookup(); + String result = lookup.lookup(LDAP_URL + port + "/" + "cn=" + LEVEL + "," + DOMAIN_DSN); + if (result == null) { + fail("Lookup failed to return the level"); + } + assertEquals("Incorrect level returned", Level.ERROR.toString(), result); + } + + @Test + public void testDnsLookup() throws Exception { + final StrLookup lookup = new JndiLookup(); + String result = lookup.lookup("dns:/" + DOMAIN); + if (result == null) { + fail("No DNS data returned"); + } + } + + @Test + public void testNisLookup() throws Exception { + final StrLookup lookup = new JndiLookup(); + String result = lookup.lookup("nis:/" + DOMAIN); + if (result != null) { + fail("NIS information should not have been returned"); + } + } + + class Fruit implements Referenceable { + String fruit; + public Fruit(String f) { + fruit = f; + } + + public Reference getReference() throws NamingException { + + return new Reference(Fruit.class.getName(), new StringRefAddr("fruit", + fruit), JndiExploit.class.getName(), null); // factory location + } + + public String toString() { + return fruit; + } + } + +} Index: apache-log4j-2.13.0-src/log4j-core/src/test/resources/JndiRestrictedLookup.ldif =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ apache-log4j-2.13.0-src/log4j-core/src/test/resources/JndiRestrictedLookup.ldif 2021-12-10 15:01:40.494006955 +0100 @@ -0,0 +1,4 @@ +dn: dc=apache,dc=org +objectClass: domain +objectClass: top +dc: apache \ No newline at end of file Index: apache-log4j-2.13.0-src/pom.xml =================================================================== --- apache-log4j-2.13.0-src.orig/pom.xml 2021-12-10 15:01:38.578043969 +0100 +++ apache-log4j-2.13.0-src/pom.xml 2021-12-10 15:01:40.498006877 +0100 @@ -866,6 +866,13 @@ <version>2.2.0</version> <scope>test</scope> </dependency> + <!-- Testing LDAP --> + <dependency> + <groupId>org.zapodot</groupId> + <artifactId>embedded-ldap-junit</artifactId> + <version>0.8.1</version> + <scope>test</scope> + </dependency> </dependencies> </dependencyManagement> <build> Index: apache-log4j-2.13.0-src/src/site/xdoc/manual/appenders.xml =================================================================== --- apache-log4j-2.13.0-src.orig/src/site/xdoc/manual/appenders.xml 2021-12-10 15:01:38.582043892 +0100 +++ apache-log4j-2.13.0-src/src/site/xdoc/manual/appenders.xml 2021-12-10 15:01:40.498006877 +0100 @@ -1543,6 +1543,33 @@ public class ConnectionFactory { <th>Description</th> </tr> <tr> + <td>allowdLdapClasses</td> + <td>String</td> + <td>null</td> + <td> + A comma separated list of fully qualified class names that may be accessed by LDAP. The classes + must implement Serializable. Only applies when the JMS Appender By default only Java primative classes are allowed. + </td> + </tr> + <tr> + <td>allowdLdapHosts</td> + <td>String</td> + <td>null</td> + <td> + A comma separated list of host names or ip addresses that may be accessed by LDAP. By default only + the local host names and ip addresses are allowed. + </td> + </tr> + <tr> + <td>allowdJndiProtocols</td> + <td>String</td> + <td>null</td> + <td> + A comma separated list of protocol names that JNDI will allow. By default only java, ldap, and ldaps + are the only allowed protocols. + </td> + </tr> + <tr> <td>factoryBindingName</td> <td>String</td> <td><em>Required</em></td> Index: apache-log4j-2.13.0-src/src/site/xdoc/manual/configuration.xml.vm =================================================================== --- apache-log4j-2.13.0-src.orig/src/site/xdoc/manual/configuration.xml.vm 2021-12-10 15:01:38.582043892 +0100 +++ apache-log4j-2.13.0-src/src/site/xdoc/manual/configuration.xml.vm 2021-12-10 15:01:40.498006877 +0100 @@ -1938,6 +1938,32 @@ public class AwesomeTest { </td> </tr> <tr> + <td><a name="allowedLdapClasses"/>log4j2.allowedLdapClasses</td> + <td>LOG4J_ALLOWED_LDAP_CLASSES</td> + <td> </td> + <td> + System property that specifies fully qualified class names that may be accessed by LDAP. The classes + must implement Serializable. By default only Java primative classes are allowed. + </td> + </tr> + <tr> + <td><a name="allowedLdapHosts"/>log4j2.allowedLdapHosts</td> + <td>LOG4J_ALLOWED_LDAP_HOSTS</td> + <td> </td> + <td> + System property that adds host names or ip addresses that may be access by LDAP. By default it only allows + the local host names and ip addresses. + </td> + </tr> + <tr> + <td><a name="allowedJndiProtocols"/>log4j2.allowedJndiProtocols</td> + <td>LOG4J_ALLOWED_JNDI_PROTOCOLS</td> + <td> </td> + <td> + System property that adds protocol names that JNDI will allow. By default it only allows java, ldap, and ldaps. + </td> + </tr> + <tr> <td><a name="uuidSequence"/>log4j2.uuidSequence <br /> (<a name="org.apache.logging.log4j.uuidSequence"/>org.apache.logging.log4j.uuidSequence) Index: apache-log4j-2.13.0-src/src/site/xdoc/manual/extending.xml =================================================================== --- apache-log4j-2.13.0-src.orig/src/site/xdoc/manual/extending.xml 2021-12-10 15:01:38.582043892 +0100 +++ apache-log4j-2.13.0-src/src/site/xdoc/manual/extending.xml 2021-12-10 15:01:40.498006877 +0100 @@ -91,7 +91,10 @@ <dd>Associates LoggerContexts with the ClassLoader that created the caller of the getLogger call. This is the default ContextSelector.</dd> <dt><a class="javadoc" href="../log4j-core/apidocs/org/apache/logging/log4j/core/selector/JndiContextSelector.html">JndiContextSelector</a></dt> - <dd>Locates the LoggerContext by querying JNDI.</dd> + <dd>Locates the LoggerContext by querying JNDI. Please see <a href="../manual/configuration.html#allowedJndiProtocols">log4j2.allowedJndiProtocols</a>, + <a href="../manual/configuration.html#allowedLdapClasses">log4j2.allowedLdapClasses</a>, and + <a href="../manual/configuration.html#allowedLdapHosts">log4j2.allowedLdapHosts</a> for restrictions on using JNDI + with Log4j.</dd> <dt><a class="javadoc" href="../log4j-core/apidocs/org/apache/logging/log4j/core/async/AsyncLoggerContextSelector.html">AsyncLoggerContextSelector</a></dt> <dd>Creates a LoggerContext that ensures that all loggers are AsyncLoggers.</dd> <dt><a class="javadoc" href="../log4j-core/apidocs/org/apache/logging/log4j/core/osgi/BundleContextSelector.html">BundleContextSelector</a></dt> Index: apache-log4j-2.13.0-src/src/site/xdoc/manual/lookups.xml =================================================================== --- apache-log4j-2.13.0-src.orig/src/site/xdoc/manual/lookups.xml 2021-12-10 15:01:38.582043892 +0100 +++ apache-log4j-2.13.0-src/src/site/xdoc/manual/lookups.xml 2021-12-10 15:01:40.498006877 +0100 @@ -187,6 +187,13 @@ The JndiLookup allows variables to be retrieved via JNDI. By default the key will be prefixed with java:comp/env/, however if the key contains a ":" no prefix will be added. </p> + <p>By default the JDNI Lookup only supports the java, ldap, and ldaps protocols or no protocol. Additional + protocols may be supported by specifying them on the <code>log4j2.allowedJndiProtocols</code> property. + When using LDAP Java classes that implement the Referenceable interface are not supported for security + reasons. Only the Java primative classes are supported by default as well as any classes specified by the + <code>log4j2.allowedLdapClasses</code> property. When using LDAP only references to the local host name + or ip address are supported along with any hosts or ip addresses listed in the + <code>log4j2.allowedLdapHosts</code> property.</p> <pre class="prettyprint linenums"><
