网站的安全隐患及应对措施探讨.doc

several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measuremen=c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured- 2 -
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several group number, then with b ± a, =c,c is is methyl b two vertical box between of accurate size. Per-2~3 measurement, such as proceeds of c values are equal and equal to the design value, then the vertical installation accurate. For example a, b, and c valueswhile on horizontal vertical errors for measurement, General in iron angle code bit at measurement level points grid errors, specific method is from baseline to methyl vertical box center line distance for a,, to b vertical box distance for b, list can measured
（1）协议漏洞。例如，IMAP和POP3协议一定要在Unix根目录下运行，攻击者利用这一漏洞攻击IMAP破坏系统的根目录，从而获得超级用户的特权。
（2）缓冲区溢出。很多系统在不检查程序与缓冲区之间变化的情况下，就接受任何长度的数据输入，把溢出部分放在堆栈内，系统仍照常执行命令。攻击者就利用这一漏洞发送超出缓冲区所能处理的长度的指令，来造成系统不稳定状态。
（3）口令攻击。例如，Unix系统软件通常把加密的口令保存在一个文件中，而该文件可通过拷贝或口令破译方法受到入侵。因此，任何不及时更