The readObject method of _DynAnyFactoryStub has been amended, such that, when reading the stringified IOR from serialized data, it will, by default, accept stringified IORs in IOR: URI format, only. As DynAnyFactory is a locally or ORB constrained type, it is not useful that serialized data should contain corbaname or corbaloc URIs. Furthermore, an ORB will prohibit the binding of a name in the INS to a DynAnyFactory IOR, as such, using a corbaname to reference an instance of DynAnyFactory is not meaningful.
The scope of the com.sun.jndi.ldap.object.trustSerialData system property has been extended to control the deserialization of java objects from the javaReferenceAddress LDAP attribute. This system property now controls the deserialization of java objects from the javaSerializedData and javaReferenceAddress LDAP attributes.
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To prevent deserialization of java objects from these attributes, the system property can be set to false. By default, the deserialization of java objects from javaSerializedData and javaReferenceAddress attributes is allowed.
jdk.jndi.object.factoriesFilter: This system and security property allows a serial filter to be specified that controls the set of object factory classes permitted to instantiate objects from object references returned by naming/directory systems. The factory class named by the reference instance is matched against this filter during remote reference reconstruction. The filter property supports pattern-based filter syntax with the format specified by JEP 290. This property applies both to the JNDI/RMI and the JNDI/LDAP built-in provider implementations. The default value allows any object factory class specified in the reference to recreate the referenced object.
com.sun.jndi.ldap.object.trustSerialData: This system property allows control of the deserialization of java objects from the javaSerializedData LDAP attribute. To prevent deserialization of java objects from the attribute, the system property can be set to false value. By default, deserialization of java objects from the javaSerializedData attribute is allowed.
A new environment property,jdk.jndi.ldap.mechsAllowedToSendCredentials, has been added tocontrol which LDAP authentication mechanisms are allowed to sendcredentials over clear LDAP connections - a connection not securedwith TLS. An encrypted LDAP connection is a connection openedby using ldaps scheme, or a connection opened by using ldap schemeand then upgraded to TLS with a STARTTLS extended operation.
The deserialization of java.lang.reflect.Proxy objects can be limited by setting the system property jdk.serialProxyInterfaceLimit.The limit is the maximum number of interfaces allowed per Proxy in the stream.Setting the limit to zero prevents any Proxies from being deserialized including Annotations, a limit of less than 2 might interfere with RMI operations.
The jdk.serialFilter system property can only be set on the command line. If the filter has not been set on the command line, it can be set can be set with java.io.ObjectInputFilter.Config.setSerialFilter. Setting the jdk.serialFilter with java.lang.System.setProperty has no effect.
The DES-related Kerberos 5 encryption types are not supported by default. These encryption types can be enabled by adding allow_weak_crypto=true in the krb5.conf file, but DES-related encryption types are considered highly insecure and should be avoided.
New access checks have been added during the object creation phase of deserialization. This should not affect ordinary uses of deserialization. However, reflective frameworks that make use of JDK-internal APIs may be impacted. The new checks can be disabled if necessary by setting the system property jdk.disableSerialConstructorChecks to the value "true". This must be done by adding the argument -Djdk.disableSerialConstructorChecks=true to the Java command line.
A new security property named jceks.key.serialFilter has been introduced. If this filter is configured, the JCEKS KeyStore uses it during the deserialization of the encrypted Key object stored inside a SecretKeyEntry. If it is not configured or if the filter result is UNDECIDED (for example, none of the patterns match), then the filter configured by jdk.serialFilter is consulted.
The filter pattern uses the same format as jdk.serialFilter. The default pattern allows java.lang.Enum, java.security.KeyRep, java.security.KeyRep$Type, and javax.crypto.spec.SecretKeySpec but rejects all the others.
The RMI Registry built-in serial filter is modified to check only the array size and not the component type. The maximum array size is increased to 1,000,000. The override filter can be used to decrease the limit. Array sizes greater than the maxarray limit will be rejected and otherwise will be allowed. The java.security file contains more information about the sun.rmi.registry.registryFilter property and it will be updated in the conf/security/java.security configuration file to better describe the default behavior and how to override it.
New public attributes, RMIConnectorServer.CREDENTIALS_FILTER_PATTERN and RMIConnectorServer.SERIAL_FILTER_PATTERN have been added to RMIConnectorServer.java. With these new attributes, users can specify the deserialization filter pattern strings to be used while making a RMIServer.newClient() remote call and while sending deserializing parameters over RMI to server respectively.
Deserialization of certain collection instances will cause arrays to be allocated. The ObjectInputFilter.checkInput() method is now called prior to allocation of these arrays. Deserializing instances of ArrayDeque, ArrayList, IdentityHashMap, PriorityQueue, java.util.concurrent.CopyOnWriteArrayList, and the immutable collections (as returned by List.of, Set.of, and Map.of) will call checkInput() with a FilterInfo instance whose style="font-family: Courier New;">serialClass() method returns Object[].class. Deserializing instances of HashMap, HashSet, Hashtable, and Properties will call checkInput() with a FilterInfo instance whose serialClass() method returns Map.Entry[].class. In both cases, the FilterInfo.arrayLength() method will return the actual length of the array to be allocated. The exact circumstances under which the serialization filter is called, and with what information, is subject to change in future releases.
Serialization Filtering introduces a new mechanism which allows incoming streams of object-serialization data to be filtered in order to improve both security and robustness. Every ObjectInputStream applies a filter, if configured, to the stream contents during deserialization. Filters are set using either a system property or a configured security property. The value of the "jdk.serialFilter" patterns are described in JEP 290 Serialization Filtering and in /lib/security/java.security. Filter actions are logged to the 'java.io.serialization' logger, if enabled.
The secure validation mode of the XML Signature implementation has been enhanced to restrict RSA and DSA keys less than 1024 bits by default as they are no longer secure enough for digital signatures. Additionally, a new security property named jdk.xml.dsig.SecureValidationPolicy has been added to the java.security file and can be used to control the different restrictions enforced when the secure validation mode is enabled.
The secure validation mode is enabled either by setting the xml signature property org.jcp.xml.dsig.secureValidation to true with the javax.xml.crypto.XMLCryptoContext.setProperty method, or by running the code with a SecurityManager.
If an XML Signature is generated or validated with a weak RSA or DSA key, an XMLSignatureException will be thrown with the message, "RSA keys less than 1024 bits are forbidden when secure validation is enabled" or "DSA keys less than 1024 bits are forbidden when secure validation is enabled".
A new java attribute has been defined for the environment to allow a JMX RMI JRMP server to specify a list of class names. These names correspond to the closure of class names that are expected by the server when deserializing credentials. For instance, if the expected credentials were a List, then the closure would constitute all the concrete classes that should be expected in the serial form of a list of Strings.
The MD5withRSA signature algorithm is now considered insecure and should no longer be used. Accordingly, MD5withRSA has been deactivated by default in the Oracle JSSE implementation by adding "MD5withRSA" to the "jdk.tls.disabledAlgorithms" security property. Now, both TLS handshake messages and X.509 certificates signed with MD5withRSA algorithm are no longer acceptable by default. This change extends the previous MD5-based certificate restriction ("jdk.certpath.disabledAlgorithms") to also include handshake messages in TLS version 1.2. If required, this algorithm can be reactivated by removing "MD5withRSA" from the "jdk.tls.disabledAlgorithms" security property.
LDAP extended operations are additional LDAP operations not included in the original standard list. For example, the Cancel Extended Operation works like an abandon operation, but finishes with a response from the server after the cancel is complete. The StartTLS Extended Operation allows a client to connect to a server on an unsecure port, but then starts Transport Layer Security negotiations to protect communications.
As ACIs are stored on entries in the directory, you can furthermore update access controls while the service is running, and even delegate that control to client applications. OpenDJ combines the strengths of ACIs with separate administrative privileges to help you secure access to directory data.
OpenDJ control panel offers a GUI for managing both local and remote servers. You choose the server to manage when you start the control panel. The control panel connects to the administration server port, making a secure LDAPS connection.
One common way to protect connections between OpenDJ and client applications involves using StartTLS for LDAP or LDAPS to secure connections. OpenDJ and client applications use X.509 digital certificates to set up secure connections. 2ff7e9595c
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