140CRA93200
产品报价:询价
更新时间:2024/2/19 15:53:46
产地:法国
品牌:施耐德
型号:140CRA93200
厂商性质: 1,2,
公司名称: 大德汇成科技厦门有限公司
袁训春 : (13695017732) (0592000000)
(联系我时,请说明是在来宝网上看到的,谢谢!)产品报价:询价
更新时间:2024/2/19 15:53:46
产地:法国
品牌:施耐德
型号:140CRA93200
厂商性质: 1,2,
公司名称: 大德汇成科技厦门有限公司
袁训春 : (13695017732) (0592000000)
(联系我时,请说明是在来宝网上看到的,谢谢!)140CRA93200
140CRA93200
140CRA93200
140CRA93200
模块优点
1:使得内核更加紧凑灵活。
2:修改内核时, 不必重新编译整个内核。
3:模块可以不依赖于某个固定的硬件平台,即使它依赖于某系统特殊的硬件特点。
4:模块的目标代码一旦被链接到内核,它的作用和静态链接的内核目标代码完全等价.所以当调用模块函数时,无须显式的消息传递.。
5:截获系统调用。
模块缺点(模块机制带来安全上的隐患)
1:修改输出符号表;
2:通过修改系统调用,使模块自己隐性;
3:重定向文件操作;
4:修改文件属主;
5:隐藏进程;
6:重定向可执行文件;
7:通过修改系统调用 sys_socketcall,使得系统在收到指定数据包后打开后门;
8:TTY 劫持;
9:病毒。
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DCS800-S02-1200-05
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