近期幽灵漏洞正在疯狂传播着,希望在下的文章能帮助到大家
vim GHOST.c
#include <netdb.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <errno.h> #include <gnu/libc-version.h> #define CANARY "in_the_coal_mine" struct { char buffer[1024]; char canary[sizeof(CANARY)]; } temp = { "buffer", CANARY }; int main(void) { struct hostent resbuf; struct hostent *result; int herrno; int retval; /*** strlen (name) = size_needed - sizeof (*host_addr) - sizeof (*h_addr_ptrs) - 1; ***/ size_t len = sizeof(temp.buffer) - 16*sizeof(unsigned char) - 2*sizeof(char *) - 1; char name[sizeof(temp.buffer)]; memset(name, '0', len); name[len] = '\0'; retval = gethostbyname_r(name, &resbuf, temp.buffer, sizeof(temp.buffer), &result, &herrno); if (strcmp(temp.canary, CANARY) != 0) { puts("vulnerable"); exit(EXIT_SUCCESS); } if (retval == ERANGE) { puts("not vulnerable"); exit(EXIT_SUCCESS); } puts("should not happen"); exit(EXIT_FAILURE); }
运行 gcc GHOST.c -o GHOST
./GHOST
如果显示
标识没有漏洞,如果相反表示存在漏洞
如果不想使用上面的检测脚本,可以去csdn下载我上传的redhat的官方的检测脚本
http://download.csdn.net/detail/xinsir88/8407621
更新办法:
Centos系统
yum clean all && yum makecache && yum -y install glibc*
关于ubunt系统的补救措施我没有测试,此处不做阐述