1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365
|
#
# DCEMAP
#
# Does a 'portmap-like' request to the remote host, to
# to determine what DCE/RPC services are running.
#
# This code is 100% based on 'dcetest', by Dave Aitel, available
# at http://www.atstake.com.
#
# dcetest is available as a free (GPL'ed) software written
# in C.
#
# License : GPLv2
#
#
#
#TODO : extract the names of PIPEs and hosts when present
#
if(description)
{
script_id(10736);
name["english"] = "DCE Services Enumeration";
script_name(english:name["english"]);
desc["english"] = "
DCE services running on the remote can be enumerated
by connecting on port 135 and doing the appropriate
queries.
An attacker may use this fact to gain more knowledge
about the remote host.
Solution : filter incoming traffic to this port.
Risk factor : Low";
script_description(english:desc["english"]);
summary["english"] = "Enumerates the remote DCE services";
script_summary(english:summary["english"]);
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2001 Dave Aitel (ported to NASL by rd)");
family["english"] = "Windows";
script_family(english:family["english"]);
script_dependencie("find_service.nes");
script_require_ports(135);
exit(0);
}
#------------------------------------------#
# String from a buffer. Inverts the bytes #
#------------------------------------------#
function istring_from_buffer(b)
{
ret = "";
l = strlen(b);
for(i=0;i<l;i=i+1)
{
hx = hex(ord(b[i]));
hx = hx - string("0x");
ret = string(hx, ret);
}
return(ret);
}
#----------------------------------#
# String from a buffer. Straight. #
#----------------------------------#
function string_from_buffer(b)
{
ret = "";
l = strlen(b);
for(i=0;i<l;i=i+1)
{
hx = hex(ord(b[i]));
hx = hx - string("0x");
ret = string(ret, hx);
}
return(ret);
}
#------------------------------------------#
# Return the guid as something printable #
#------------------------------------------#
function strguid(guid)
{
tbuffer = "";
tbuffer2 = "";
tbuffer3 = "";
tbuffer4 = "";
tbuffer5 = "";
for(i=0;i<4;i=i+1)tbuffer = string(tbuffer, raw_string(ord(guid[i])));
for(i=0;i<2;i=i+1)tbuffer2 = string(tbuffer2, raw_string(ord(guid[i+4])));
for(i=0;i<2;i=i+1)tbuffer3 = string(tbuffer3, raw_string(ord(guid[i+6])));
for(i=0;i<2;i=i+1)tbuffer4 = string(tbuffer4, raw_string(ord(guid[i+8])));
for(i=0;i<6;i=i+1)tbuffer5 = string(tbuffer5, raw_string(ord(guid[i+10])));
_ret = string(istring_from_buffer(b:tbuffer), "-",
istring_from_buffer(b:tbuffer2), "-",
istring_from_buffer(b:tbuffer3), "-",
string_from_buffer(b:tbuffer4), "-",
string_from_buffer(b:tbuffer5));
return(_ret);
}
#--------------------------------------------------------------------------#
function dce_bind()
{
uuid = raw_string(0x08, 0x83, 0xAF, 0xE1,
0x1F, 0x5D, 0xC9, 0x11,
0x91, 0xA4, 0x08, 0x00,
0x2B, 0x14 ,0xA0, 0xFA);
transfer_syntax = raw_string(
0x04, 0x5D, 0x88, 0x8A, 0xEB, 0x1C, 0xC9, 0x11,
0x9F, 0xE8, 0x08, 0x00, 0x2B, 0x10, 0x48, 0x60
);
return(raw_string(0x05, 0x00, 0x0B, 0x03,
0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0xD0, 0x16, 0xD0, 0x16,
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x00, 0x00, 0x01, 0x00)
+ uuid
+ raw_string(0x03, 0x00, 0x00, 0x00)
+ transfer_syntax +
raw_string(0x02, 0x00, 0x00, 0x00));
}
function dce_enum_get(callid, handle)
{
_c = callid % 255;
_ret = raw_string(0x05, 0x00, 0x00, 0x03,
0x10, 0x00, 0x00, 0x00, 0x64, 0x00, 0x00, 0x00,
_c, 0x00, 0x00, 0x00, 0x4C, 0x00, 0x00, 0x00,
0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00) + handle + raw_string(0x01, 0x00, 0x00, 0x00);
return(_ret);
}
function load_long(b, t)
{
__ret_lo_lo = ord(b[t]);
__ret_hi_lo = ord(b[t+1])*256;
__ret_lo_hi = ord(b[t+2])*65536;
__ret_hi_hi = ord(b[t+3])* 16777216;
__ret = __ret_hi_hi + __ret_lo_hi + __ret_hi_lo + __ret_lo_lo;
return(__ret);
}
function load_short_ntohs(b, t)
{
__ret_lo = ord(b[t]);
__ret_hi = ord(b[t+1])*256;
__ret = __ret_hi + __ret_lo;
return(__ret);
}
function load_short(b, t)
{
__ret_lo = ord(b[t+1]);
__ret_hi = ord(b[t])*256;
__ret = __ret_hi + __ret_lo;
return(__ret);
}
function dce_parse(result)
{
#
# Update the handle
#
handle = "";
for(i=0;i<16;i=i+1)
{
handle = string(handle,raw_string(ord(result[28+i])));
}
p = 84; # 28 + 16 + 40;
tint = load_long(b:result, t:p);
annotation = "";
p = p + 4;
#display("tint_ann : ", tint, "\n");
for(i=0;i<tint;i=i+1)
{
annotation = string(annotation, r[p+i]);
}
#display("=======> ", annotation, "\n");
p = p + tint;
while((tint % 4))
{
p = p + 1;
tint = tint + 1;
}
# p = p + 1;
# for(i=0;i<4;i=i+1)display(hex(ord(r[p+i])), " ");
# display("\n");
realtype = load_long(b:r, t:p);
p = p + 8;
typefield = load_short(b:r, t:p);
p = p + 2;
sizefield = load_short(b:r, t:p);
p = p + 2;
guid = "";
for(i = 0 ; i < 16 ; i = i + 1)
{
guid = string(guid,raw_string(r[p+i]));
}
p = p + 57; # 16+2+4+2+1+16+2+4+2+1+4+2+2;
IPTYPE = 0x4B;
NCACN_NP = 0x58;
NCALRPC = 0x47;
NCALRPC2 = 0x56;
NCALRPC3 = 0x4E;
UNKNOWN1 = 0x5A;
if(realtype == IPTYPE)
{
mytype = " Type: ncacn_ip_";
udp_or_tcp = ord(r[p]);
if(udp_or_tcp == 0x08)proto = "udp";
else {
if(udp_or_tcp == 0x07)proto = "tcp";
else proto = "unknown!";
}
mytype = string(mytype, proto, "\n");
p = p + 3 ; #1 + 2;
port = load_short(b:r, t:p);
p = p + 7; #2 + 2 + 3;
ip = "";
for(i=0;i<3;i=i+1)
{
ip = ip + ord(r[p+i]) + ".";
}
ip = ip + ord(r[p+3]);
report = string("A DCE service is listening on ", ip, ":", port, " : \n\n",
mytype,
" UUID : ", strguid(guid:guid), "\n");
if(annotation)report = string(report, " Annotation : ", annotation, "\n");
myip = this_host();
if(proto == "unknown!")proto = "tcp";
security_note(port:port, data:report, proto:proto);
}
if((realtype == NCALRPC3) ||
(realtype == NCALRPC2) ||
(realtype == NCALRPC))
{
p = p + 1;
strlength = load_short_ntohs(b:r, t:p);
p = p + 2;
servicename = "";
for(i=0;i<strlength;i=i+1)
{
servicename = string(servicename, r[i+p]);
}
report = string("The DCE Service '", servicename, "' is running on this host\n",
" Type : ncalrpc\n",
" UUID : ", strguid(guid:guid), "\n");
if(annotation)report = string(report, " Annotation : ", annotation, "\n");
security_note(port:135, data:report);
}
if(realtype == NCACN_NP)
{
p = p + 1;
sizeshort = load_short(b:r, t:p);
p = p + 2;
nacn_endpoint = "";
for(i=0;i<sizeshort;i=i+1)
{
nacn_endpoint = string(nacn_endpoint, r[p]);
p = p + 1;
}
# display(nacn_endpoint, "\n");
}
#display(hex(realtype), "\n");
}
#-----------------------------------------------------------------------------------------#
handle = raw_string(0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
if(get_port_state(135))
{
soc = open_sock_tcp(135);
if(!soc)exit(0);
enum = 0;
send(socket:soc, data:dce_bind());
r = recv(socket:soc, length:4096);
if(strlen(r) < 60)exit(0); # bad reply length
for(x=0;x<4096;x=x+1)
{
send(socket:soc, data:dce_enum_get(callid:x, handle:handle));
#sleep(1);
r = recv(socket:soc, length:4096);
#display(".\n");
if(strlen(r) <= 65)
{
# finished
x = 4096;
}
else {
dce_parse(result:r);
enum = enum + 1;
}
}
close(soc);
if(enum)security_warning(135);
}
|