On Thu, Sep 11, 2003 at 05:01:55PM -0600, David Kyle Sayre wrote:
> Hello all,
>
> I have 4 classes of machines that are frequently coming up as false positives
> on the version 1.11 of the msrpc_dcom2.nasl. I have run the nasl -t target
> msrpc_dcom2.nasl, but I only get success. What would be helpful? These are
> the OS's affected
>
> 1) AIX running DCE
> 2) HP running DCE
> 3) Win NT workstation
> 4) Win NT Server
Run the attached plugin in command line (nasl -t ip.of.targets) and send
me the output.
-- Renaud
#
# (C) Tenable Network Security
#
# v1.2: use the same requests as MS checktool
#
if(description)
{
script_id(11835);
script_cve_id("CAN-2003-0715", "CAN-2003-0528", "CAN-2003-0605");
script_bugtraq_id(8458);
script_version ("$Revision: 1.11 $");
name["english"] = "Microsoft RPC Interface Buffer Overrun (KB824146)";
script_name(english:name["english"]);
desc["english"] = "
The remote host is running a version of Windows which has a flaw in
its RPC interface, which may allow an attacker to execute arbitrary code
and gain SYSTEM privileges.
An attacker or a worm could use it to gain the control of this host.
Note that this is NOT the same bug as the one described in MS03-026
which fixes the flaw exploited by the 'MSBlast' (or LoveSan) worm.
Solution: see http://www.microsoft.com/technet/security/bulletin/MS03-039.asp
Risk factor : High";
script_description(english:desc["english"]);
summary["english"] = "Checks if the remote host has a patched RPC interface
(KB824146)";
script_summary(english:summary["english"]);
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2003 Tenable Network
Security");
family["english"] = "Gain root remotely";
script_family(english:family["english"]);
script_require_ports("Services/msrpc", 135, 139, 593);
exit(0);
}
#
# The script code starts here
#
include("smb_nt.inc");
function open_wkssvc(soc, uid, tid)
{
local_var uid_lo, uid_hi, tid_lo, tid_hi, r;
uid_lo = uid % 256;
uid_hi = uid / 256;
tid_lo = tid % 256;
tid_hi = tid / 256;
r = raw_string( 0x00, 0x00,
0x00, 0x64, 0xFF, 0x53, 0x4D, 0x42, 0xA2, 0x00,
0x00, 0x00, 0x00, 0x18, 0x07, 0xC8, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, tid_lo, tid_hi, 0x00, 0x28,uid_lo, uid_hi,
0x00, 0x00, 0x18, 0xFF, 0x00, 0xDE, 0xDE, 0x00,
0x0E, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x9F, 0x01, 0x02, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x01, 0x00,
0x00, 0x00, 0x40, 0x00, 0x00, 0x00, 0x01, 0x00,
0x00, 0x00, 0x01, 0x11, 0x00, 0x00, 0x5C, 0x00,
0x77, 0x00, 0x6b, 0x00, 0x73, 0x00, 0x73, 0x00,
0x76, 0x00, 0x63, 0x00, 0x00, 0x00);
send(socket:soc, data:r);
r = smb_recv(socket:soc, length:4096);
if(strlen(r) < 65)return(NULL);
else
{
fid_lo = ord(r[42]);
fid_hi = ord(r[43]);
return(fid_lo + (fid_hi * 256));
}
}
function bind(soc, uid, tid, fid)
{
local_var uid_lo, uid_hi, tid_lo, tid_hi, fid_lo, fid_hi, r;
uid_lo = uid % 256;
uid_hi = uid / 256;
tid_lo = tid % 256;
tid_hi = tid / 256;
fid_lo = fid % 256;
fid_hi = fid / 256;
r = raw_string(0x00, 0x00,
0x00, 0x9C, 0xFF, 0x53, 0x4D, 0x42, 0x25, 0x00,
0x00, 0x00, 0x00, 0x18, 0x07, 0xC8, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, tid_lo, tid_hi, 0x00, 0x28, uid_lo, uid_hi,
0x00, 0x00, 0x10, 0x00, 0x00, 0x48, 0x00, 0x00,
0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x54,
0x00, 0x48, 0x00, 0x54, 0x00, 0x02, 0x00, 0x26,
0x00, fid_lo, fid_hi, 0x59, 0x00, 0x05, 0x5C, 0x00,
0x50, 0x00, 0x49, 0x00, 0x50, 0x00, 0x45, 0x00,
0x5C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x05, 0x00,
0x0B, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00,
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xB8, 0x10,
0xB8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x98, 0xD0,
0xFF, 0x6B, 0x12, 0xA1, 0x10, 0x36, 0x98, 0x33,
0x46, 0xC3, 0xF8, 0x7E, 0x34, 0x5a, 0x01, 0x00,
0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c,
0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2B, 0x10,
0x48, 0x60, 0x02, 0x00, 0x00, 0x00);
send(socket:soc, data:r);
r = smb_recv(socket:soc, length:4096);
return r;
}
function get_wks_info(soc, uid, tid, fid)
{
local_var uid_lo, uid_hi, tid_lo, tid_hi, fid_lo, fid_hi, r, name, len;
local_var len_hi, len_lo, uname, i, wks, dce, smb;
uid_lo = uid % 256;
uid_hi = uid / 256;
tid_lo = tid % 256;
tid_hi = tid / 256;
fid_lo = fid % 256;
fid_hi = fid / 256;
name = "\\" + get_host_ip();
for(i=0;i<strlen(name);i++)
{
uname += name[i] + raw_string(0);
}
uname += raw_string(0, 0);
if((strlen(name) & 1) == 0)uname += raw_string(0, 0);
len = strlen(name) + 1;
len_hi = len / 256;
len_lo = len % 256;
wks = raw_string(0xB0, 0x3D,
0x7F, 0x00, len_lo, len_hi, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, len_lo, len_hi, 0x00, 0x00) + uname +
raw_string(0x64, 0x00, 0x00, 0x00);
len = 24 + strlen(wks);
len_hi = len / 256;
len_lo = len % 256;
dce = raw_string(0x05, 0x00,
0x00, 0x03, 0x10, 0x00, 0x00, 0x00, len_lo, len_hi,
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x34, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00) + wks;
smbpipe2 = raw_string( 0x05, 0x5C, 0x00,
0x50, 0x00, 0x49, 0x00, 0x50, 0x00, 0x45, 0x00,
0x5C, 0x00, 0x00, 0x00, 0x00, 0x00) + dce;
len = strlen(smbpipe2);
len_hi = len / 256;
len_lo = len % 256;
smbpipe = raw_string(0x26, 0x00, fid_lo, fid_hi, len_lo, len_hi) + smbpipe2;
smb = raw_string( 0xFF, 0x53, 0x4D, 0x42, 0x25, 0x00,
0x00, 0x00, 0x00, 0x18, 0x07, 0xc8, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, tid_lo, tid_hi, 0x00, 0x28, uid_lo, uid_hi,
0x00, 0x00, 0x10, 0x00, 0x00, strlen(dce) % 256, strlen(dce) / 256,
0x00,
0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x54,
0x00, strlen(dce) % 256, strlen(dce) / 256, 0x54, 0x00, 0x02, 0x00)
+ smbpipe;
netbios = raw_string(0, 0, strlen(smb) / 256, strlen(smb) % 256) + smb;
send(socket:soc, data:netbios);
r = smb_recv(socket:soc, length:4096);
if(strlen(r) < 120)return NULL;
len = ord(r[120]) + (ord(r[121]) * 256);
len --;
name = NULL;
for(i=124;i<124 + len*2;i+=2)
{
name += r[i];
}
return name;
}
function get_smb_host_name()
{
local_var r, soc, uid;
if(!get_port_state(139))return NULL;
soc = open_sock_tcp(139);
if(!soc)return NULL;
r = smb_session_request(soc:soc, remote:"*SMBSERVER");
if(!r)return NULL;
prot = smb_neg_prot(soc:soc);
if(!prot)return NULL;
r = smb_session_setup(soc:soc, login:"", password:"", domain:"", prot:prot);
if(!r)return NULL;
uid = session_extract_uid(reply:r);
r = smb_tconx(soc:soc, name:"*SMBSERVER", uid:uid, share:"IPC$");
tid = tconx_extract_tid(reply:r);
if(!tid)return NULL;
fid = open_wkssvc(soc:soc, uid:uid, tid:tid);
r = bind(soc:soc, uid:uid, tid:tid, fid:fid);
return get_wks_info(soc:soc, uid:uid, tid:tid, fid:fid);
}
function dcom_recv(socket)
{
local_var buf, len;
buf = recv(socket:socket, length:10);
if(strlen(buf) != 10)return NULL;
len = ord(buf[8]);
len += ord(buf[9])*256;
buf += recv(socket:socket, length:len - 10);
return buf;
}
port = 135;
if(!get_port_state(port))port = 593;
else {
soc = open_sock_tcp(port);
if(!soc)port = 593;
else close(soc);
}
if(!get_port_state(port))exit(0);
#-------------------------------------------------------------#
function hex2raw(s)
{
local_var i, j, ret;
for(i=0;i<strlen(s);i+=2)
{
if(ord(s[i]) >= ord("0") && ord(s[i]) <= ord("9"))
j = int(s[i]);
else
j = int((ord(s[i]) - ord("a")) + 10);
j *= 16;
if(ord(s[i+1]) >= ord("0") && ord(s[i+1]) <= ord("9"))
j += int(s[i+1]);
else
j += int((ord(s[i+1]) - ord("a")) + 10);
ret += raw_string(j);
}
return ret;
}
#--------------------------------------------------------------#
function check(req)
{
local_var soc, bindstr, error_code, r;
soc = open_sock_tcp(port);
if(!soc)exit(0);
bindstr =
"05000b03100000004800000001000000d016d016000000000100000000000100a001000000000000c00000000000004600000000045d888aeb1cc9119fe808002b10486002000000";
send(socket:soc, data:hex2raw(s:bindstr));
r = dcom_recv(socket:soc);
if(!r)exit(0);
send(socket:soc, data:req);
r = dcom_recv(socket:soc);
if(!r)return NULL;
close(soc);
error_code = substr(r, strlen(r) - 4, strlen(r));
return error_code;
}
function check2(req)
{
local_var soc,bindstr, error_code, r;
soc = open_sock_tcp(port);
if(!soc)exit(0);
bindstr =
"05000b03100000004800000001000000d016d016000000000100000000000100a001000000000000c00000000000004600000000045d888aeb1cc9119fe808002b10486002000000";
send(socket:soc, data:hex2raw(s:bindstr));
r = dcom_recv(socket:soc);
if(!r)exit(0);
send(socket:soc, data:req);
r = dcom_recv(socket:soc);
if(!r)return NULL;
error_code = substr(r, strlen(r) - 8, strlen(r) - 4);
return error_code;
}
function check3(req)
{
local_var soc,bindstr, error_code, r;
soc = open_sock_tcp(port);
if(!soc)exit(0);
bindstr =
"05000b03100000004800000002000000d016d016000000000100000001000100b84a9f4d1c7dcf11861e0020af6e7c5700000000045d888aeb1cc9119fe808002b10486002000000";
send(socket:soc, data:hex2raw(s:bindstr));
r = dcom_recv(socket:soc);
if(!r)exit(0);
send(socket:soc, data:req);
r = dcom_recv(socket:soc);
if(!r)return NULL;
error_code = substr(r, strlen(r) - 24, strlen(r) - 20);
return error_code;
}
function check4(req)
{
local_var soc,bindstr, error_code, r;
soc = open_sock_tcp(port);
if(!soc)exit(0);
bindstr =
"05000b03100000004800000002000000d016d016000000000100000001000100b84a9f4d1c7dcf11861e0020af6e7c5700000000045d888aeb1cc9119fe808002b10486002000000";
send(socket:soc, data:hex2raw(s:bindstr));
r = dcom_recv(socket:soc);
if(!r)exit(0);
send(socket:soc, data:req);
r = dcom_recv(socket:soc);
if(!r)return NULL;
error_code = substr(r, strlen(r) - 24, strlen(r) - 20);
return error_code;
}
function req5()
{
local_var name, buf, uname;
name = get_smb_host_name();
if(!name)display("Could not establish NULL session\n");
if(!name)return NULL;
name = "\\" + name + "\C$\";
len = strlen(name) + 1;
for(i=0;i<strlen(name);i++)
{
uname += name[i] + raw_string(0);
}
if((strlen(name) & 1) == 0) uname += raw_string(0, 0);
len_lo = len % 256;
len_hi = len / 256;
buf = raw_string(0x05, 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, 0x95, 0x96,
0x95, 0x2A, 0x8c, 0xDA, 0x6D, 0x4a, 0xb2, 0x36,
0x19, 0xBC, 0xAF, 0x2C, 0x2d, 0xea, 0x30, 0xeb,
0x8F, 0x00, len_lo, len_hi, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, len_lo, len_hi, 0x00, 0x00) + uname +
raw_string(
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00,
0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x01, 0x00,
0x00, 0x00, 0xdc, 0xea, 0x8f, 0x00, 0x01, 0x00,
0x00, 0x00, 0x95, 0x96, 0x95, 0x2A, 0x8C, 0xDA,
0x6D, 0x4a, 0xb2, 0x36, 0x19, 0xbc, 0xaf, 0x2c,
0x2d, 0xea, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00,
0x00, 0x00, 0x5C, 0x00);
len = strlen(buf);
len_lo = len % 256;
len_hi = len / 256;
tlen = len + 24;
tlen_lo = tlen % 256;
tlen_hi = tlen / 256;
head = raw_string(0x05, 0x00,
0x00, 0x03, 0x10, 0x00, 0x00, 0x00, tlen_lo, tlen_hi,
0x00, 0x00, 0x02, 0x00, 0x00, 0x00, len_lo,len_hi,
0x00, 0x00, 0x01, 0x00, 0x00, 0x00) + buf;
return head;
}
#---------------------------------------------------------------#
# Determine if we the remote host is running Win95/98/ME
bindwinme =
"05000b03100000004800000053535641d016d016000000000100000000000100e6730ce6f988cf119af10020af6e72f402000000045d888aeb1cc9119fe808002b10486002000000";
soc = open_sock_tcp(port);
if(!soc)exit(0);
send(socket:soc, data:hex2raw(s:bindwinme));
rwinme = dcom_recv(socket:soc);
close(soc);
lenwinme = strlen(rwinme);
stubwinme = substr(rwinme, lenwinme-24, lenwinme-21);
# This is Windows 95/98/ME which is not vulnerable
if("02000100" >< hexstr(stubwinme))exit(0);
#----------------------------------------------------------------#
REGDB_CLASS_NOTREG = "5401048000";
CO_E_BADPATH = "0400088000";
NT_QUOTE_ERROR_CODE_EQUOTE = "00000000";
#
req1 =
"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";
req2 =
"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";
req3 =
"05000e03100000004800000003000000d016d01605af00000100000001000100b84a9f4d1c7dcf11861e0020af6e7c5700000000045d888aeb1cc9119fe808002b10486002000000";
req4 =
"05000003100000009a00000003000000820000000100000005000200000000000000000000000000000000000000000000000000000000009596952a8cda6d4ab23619bcaf2c2dea34eb8f000700000000000000070000005c005c004d0045004f00570000000000000000005c0048005c0048000100000058e98f00010000009596952a8cda6d4ab23619bcaf2c2dea01000000010000005c00";
#display(hex2raw(s:req));
#exit(0);
error1 = check(req:hex2raw(s:req1));
error2 = check(req:hex2raw(s:req2));
error3 = check(req:hex2raw(s:req3));
error4 = check2(req:hex2raw(s:req4));
if(hexstr(error1) == "0000000000")
{
req = req5();
if(req)
error5 = check4(req:req);
}
display("error1=", hexstr(error1), "\n");
display("error2=", hexstr(error2), "\n");
display("error3=", hexstr(error3), "\n");
display("error4=", hexstr(error4), "\n");
display("error5=", hexstr(error5), "\n");
if(hexstr(error2) == hexstr(error1))
{
vulnerable = 1;
if(hexstr(error1) == "0500078000")exit(0); # DCOM disabled
if(hexstr(error1) == "0000000000" && hexstr(error5) == "0400088001")vulnerable = 0;
}
if(vulnerable)
{
security_hole(port);
}
else {
set_kb_item(name:"SMB/KB824146", value:TRUE);
}
