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In July 2003, a vulnerability was discovered with the Windows remote procedure call (RPC) service. The vulnerability was considered so severe that extraordinary measures were taken to notify Windows users. In addition to sending security bulletins to security bulletin subscribers, Microsoft took the unusual step of send ing announcements and warnings to customers. Many security organizations, pub lications, and the mainstream press provided information and repeated the warnings. Patch while there s time, everyone said. However, when a worm that exploited the vulnerability surfaced (the so-called Blaster, or LoveSan, worm), a large number of computers were infected nonetheless. Microsoft Certified Professional Magazine did a quick survey in which they asked network administrators whether they were affected by the worm. More than 40 percent indicated they knew about the worm but were still affected. They just did not have the time necessary to patch all systems. (The patch was available three weeks before the worm was released.) A small percentage indicated they had not heard about the worm. An independent survey at www.howstuffworks.com indicated that 27 percent of respondents had problems with the Blaster worm. Symantec indicated that more than 330,000 computers were infected. To make any operation more efficient, determine the steps in the process and then determine those you can change and ignore those you cannot. You cannot, for exam ple, affect the time it takes to produce and make available a patch, and you cannot affect the time at which an attack based on the vulnerability becomes available. You can, however, influence the time it takes to approve a patch for distribution on your network (approval time), and you can influence the time it takes to distribute and apply the patch (patch time). Follow these guidelines to improve the efficiency com ponent of your security update design:

<ejb-jar xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/ejb-jar_3_1.xsd"

Description Allows you to specify a command and the arguments that apply to it. For a list of commands and arguments, see Windows Support Tools Help. Forces Repadmin to use an RPC session for network communications. Forces Repadmin to use an LDAP session for network communications. Allows you to specify an optional user as the administrator. If the user name is not specified, the credentials of the currently logged-on user are used. Allows you to specify the password of the user specified by the /u: parameter. If the password is not specified, the credentials of the currently logged-on user are used.

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/pw:{password|*}

monitoring and troubleshooting tasks using Repadmin:

version="3.1"> <enterprise-beans> <!-In this section we'll bolster our EncryptionEJB with some additional metadata to complement the info defined via annotations. --> <session> <!-This will match the value of @Stateless.name upon our bean implementation class --> <ejb-name>EncryptionEJB</ejb-name> <!-- Override the ciphers default passphrase --> <env-entry> <env-entry-name>ciphersPassphrase</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> <env-entry-value>OverriddenPassword</env-entry-value> </env-entry> <!-- Override the default unidirectional hash MessageDigest algorithm --> <env-entry> <env-entry-name>messageDigestAlgorithm</env-entry-name> <env-entry-type>java.lang.String</env-entry-type> <env-entry-value>SHA</env-entry-value> </env-entry> </session> </enterprise-beans> </ejb-jar>

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Track the vulnerability/attack timeline. Record 1) the time that the bulletin and update is available, 2) that your test is done and application of the patch is approved, and 3) that patches are confirmed as deployed:

There are additional monitoring and troubleshooting tasks you can perform using Repadmin. Refer to Windows Support Tools Help for further information.

When this file, META-INF/ejb-jar.xml, is included in the packaging of the EJB, the Container will place the designated values within the ENC of our EncryptionEJB upon deployment. The messageDigestAlgorithm field may then be injected by the Container. But we ve defined no annotation upon the field ciphersPassphrase, so we ll look it up manually. The @Resource annotation is very versatile, and when placed upon a known type such as SessionContext, the Container knows how to handle this injection request. Through the lookup() method upon a SessionContext, we can poke into the ENC to obtain the value we re looking for:

Note To use Repadmin, you must first install the Windows Support Tools on your computer. You can find the complete installation procedure in 2, Administering Active Directory.

Approval time is the time between the bulletin and patch release. Patch time is the time between the approval and confirmed patch deployment.

To use Repadmin, complete the following steps: 1. Click Start, and then click Command Prompt. 2. At the command prompt, type the appropriate Repadmin command and parame ters. The following are among the options available:

Look for ways to improve approval time. Before a patch is approved, you check for its relevance to your systems, determine how critical it is, and test it to determine how safe it is. Is information available that allows for a quick determination of relevance Is a test system in place to test network or server issues with the update Are there tools for acceptance testing, and is testing staffed Can the pri ority of the update be easily determined Who approves the change If a change management team must meet to approve changes, do they meet frequently enough Are there problems in patch downloads Look for ways to improve patch time. Are the necessary tools or skills available Is there a system for rolling out the patch to your entire organization How do you determine whether a release was successful Do you have a way of dealing with errors Must some servers be manually patched Are remote users managed What about traveling users

private String getEnvironmentEntryAsString(final String envEntryName) throws IllegalStateException { // Get the SessionContext from the injected instance member final SessionContext context = this.context;

To display the replication partners for a domain controller, type: repadmin /showrepl DC_LIST, where DC_LIST is the host name of the domain controller. For example: repadmin /showrepl server1.contoso.com. The objectGUID (the globally unique identifier) for the selected server and its replica tion partners and the InvocationID for the selected server are shown.