Novell NetWare Hacking in Software

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The first step for attackers is to create an anonymous attachment to a Novell server To understand what an attachment is, you must understand the NetWare login process Novell designed NetWare logins so that to authenticate to a server, you had to first attach to it The attachment and login are not interdependent In other words, when a login fails, the attachment remains So you don t need a valid username and password to gain the attachment As we ll show you, through the attachment alone, much of what crackers need to hack your NetWare boxes is available We showed you how to browse the network, in particular all the NetWare servers and trees, in 3 Now all you need to do is attach to a server, and there are plenty of ways to do that Three main tools will be discussed here for attaching to a server: On-Site Admin from Novell, snlist, and nslist You can also attach with traditional DOS login or Client32 Login programs, but you must do so by logging in (which will most likely fail without a known username and password) But attaching by failing a login is not the stealthy technique that attackers use because it can be logged at the console; consequently most attackers don t come near this technique
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As an administrator, you simply must include On-Site in your security toolkit This graphical NetWare management product from Novell provides information about servers and trees, and enables nearly everything you ll need to evaluate your initial security posture The developers at Novell made a smart decision in developing this application, but it can be used against you How ironic that it is now one of the primary tools for Novell hacking
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When On-Site loads, it displays all the NetWare servers learned from the Network Neighborhood browse you performed in 3 With the servers displayed in On-Site, simply select a server with your mouse This will automatically create an attachment to the server You can verify this by looking at the Client32 NetWare Connections One by one you can create attachments to servers you wish to study
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Both snlist and nslist attach to servers on the wire the same way On-Site does, only through the command line Snlist tends to be much faster than nslist and is the recommended tool for our purposes, but nslist is helpful in displaying the server s complete address, which will help us down the road Both products can be used without parameters to attach to all servers on the wire, or with a server name as a parameter to attach to a particular server Attaching in this manner lays the foundation for the juicy hacking, coming up next If you have problems attaching to Novell servers, check your Set Primary server Do this by opening your NetWare Connections dialog box and looking for the server with the asterisk preceding the name You must have at least one server attached before using these tools If you do and you re still having problems, select another server and choose the Set Primary button When using command-line tools, you may need to start a new command prompt (cmdexe for NT or commandcom for Win9x) whenever you make any notable connections Otherwise you may encounter a number of errors and spend hours troubleshooting
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Countermeasure U Attachingaware of any mechanism to disable the ability to attach to a NetWare server We are not
This feature appears to be here to stay, as it is also in NetWare 5
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In this zombie state of attaching but not authenticating, a great deal of information can be revealed more than should really be possible Tools like userinfo, userdump, finger, bindery, bindin, nlist, and cx provide bindery information Tools like
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