我曾经打电话给一个BBS，它在首页上有一个“Drop To DOS”选项。菜单上没有列出来，但我打错了，无意中找到了。

然后我可以远程访问这家伙的DOS命令行。

在一些Unix机器(当然是所有的SunOS)上，您可以将setuid shell脚本链接到一个名为“-i”的文件。 shell脚本将文件名解释为它的第一个参数，并运行"sh -i" =一个交互式shell，并获得setuid文件所有者的许可。

因为大多数setuid shell脚本都是以根用户身份运行的，以便允许您执行一些需要根用户权限的操作，比如弹出CD或加载磁带。这意味着在20世纪90年代，在大多数大学的Unix机器上获得管理是很简单的。

我们有一个旧的计算机集群，在我工作的一个实验室里没有运行。几个本科生认为，让它运行起来会很有趣，这样他们就可以学习一点并行计算了。他们让它运行起来，结果证明它非常有用。

One day I came in and was checking out the stats...It was running at 100%. Now this was a 24 node cluster and there were only 3 of us that ever used it so it was a little strange that it was running at this load. I started playing with it, trying to figure out what was loading it...turned out someone had gained access and was using it as their own little porn server and spammer. I asked the undergrads what kind of security they put on it, they looked at me and said "Security? We didn't think it would need any."

我给它加了个密码，就这样。把它用作色情服务器的人原来是一个本科生的朋友。

About 3 years ago I built a site for a somewhat large non-profit organization in our state. When it came time to deploy the application to their web host server, I noticed an odd file named "cc.txt" or something obvious like that in their public site. It was under their web root, was getting served, and was a csv file of all their donor's names, addresses, credit card numbers, expiration dates, and CVV/CVC codes. I cannot count the number of times I brought the issue up - first to my boss, then our company accountant, the client's IT director, finally the client's President. That was 3 years ago. The file is still being served, it can even be googled. And it's been updated. I tend not to respond to their donation solicitations when I get them.

http://apache.org/.svn/entries

我通过更改ServerFault beta访问cookie的域进入http://dev.superuser.com/。(他们现在已经修好了)