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On the Target Selection page, you also need to select a scanning level option, which include the following: Light scanning Heavy scanning Heavy+ scanning Difficult to detect Easy to detect Won t crash Windows NT targets May well crash Windows NT targets
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There is a final option that just checks the top ten security flaws, as identified by the report at http://www.sans.org/top20/top10.php. These flaws include BIND weaknesses, vulnerable CGI programs, Remote Procedure Call (RPC) weaknesses, Sendmail buffer
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overflow, mountd exploits, UNIX NFS exports, user IDs (especially root/administrator with no passwords), IMAP and POP buffer-overflow vulnerabilities, and SNMP community strings set to public and private. Always remember that attempting to break in to a computer system is a criminal offense in many jurisdictions: You should obtain written authorization from the owner of your system before embarking on a security-related exercise of this kind; otherwise, it may be misconstrued as a real attack. Once the target selection is complete, the data collection process begins by executing a number of scripts on the server and reporting the results through the Web browser. Data is collected by testing many different Solaris services, including ping, finger, RPC, login, rsh, sendmail, tooltalk, snmp, and rstatd. SAINT uses several different modules to probe vulnerabilities in the system, including tcpscan, udpscan, and ddos, which scan for TCP and UDP DoS issues, respectively. In addition, a number of well-known username and password combinations are also attempted in order to break into an account you would imagine that root/root would never be used as a username and password combination, but it does happen. Once all the data has been collected, the results of the scan are then displayed on the Data Analysis page, as shown in Figure 9-8. It is possible to list vulnerabilities by their danger level, by the type of vulnerability, or by the number of vulnerabilities in a specific category. Most administrators will want to deal with the most dangerous vulnerabilities, so the first option, By Approximate Danger Level, should be selected. In addition, it is possible to view information about the target system by class of service, the type of system, domain name, subnet, and by its hostname. Vulnerabilities are listed in terms of danger level: critical problems, areas of concern, and potential problems. For the local host okami, which was a standard Solaris install out-of-the-box, two critical problems were identified, both associated with gaining root access via buffer overflow: The CDE-based Calendar Manager service may be vulnerable to a bufferoverflow attack, as identified in CVEs 1999-0320 and 1999-0696. The Calendar Manager is used to manage appointments and other date/time based functions. The remote administration daemon (sadmind) may be vulnerable to a bufferoverflow attack, as described in CVE 1999-0977. The remote administration daemon is used to manage system administration activities across a number of different hosts. There were also two areas of concern identified, with information-gathering vulnerabilities exposed: The finger daemon returned personal information about users that could be used to stage an attack. For example, the home directory, full name, and project were displayed (CVE 1999-0612). The remote users list daemon was active, providing a list of users on the system to any remote user (CVE 1999-0626). Like the finger daemon, information gathered from the ruserd could be used to stage an attack.
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FIGURE 9-8
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Two possible vulnerabilities were identified: The chargen program is vulnerable to UDP flooding used in DoS attacks, such as Fraggle (CVE 1999-0103). The sendmail server allows mail relaying, which may be used by remote users to forward mail using the server. This makes it easy for companies promoting spam to make it appear as if their mail originated from your server. Six recommendations were made to limit Internet access, including stopping all the r services. These make it easy for a remote user to execute commands on the local system, such as spawning a shell or obtaining information about system load, but have been used in the past to break into systems. In addition, some sendmail commands (such
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