On Thu, Sep 11, 2003 at 02:23:45AM -0400, John Kapp wrote:
> Over the past couple weeks, I've had very good results using msrpc_dcom.nasl for
> testing for the MS03-026 patch. Now that we have starting applying MS03-039, I'm
> getting inconsistent results with both the msrpc_dcom and dcom2 plugins. After
> applying the 039 patch, about 20% of the systems that I scan are reported as being
> vulnerable by both the dcom and dcom2 plugins. Microsoft's KB824146 scanner
> accurately reports that both patches have been installed on these same systems.
Could you run the attached plugin in command-line mode and tell me
what it outputs ? (nasl -t target msrpc_dcom2.nasl).
What operating system is running on the hosts which are supposed to be
patched ?
Also, note that msrpc_dcom.nasl won't work against a host with
MS03-039 applied, so make sure you are running version 1.9 and that BOTH
msrpc_dcom.nasl and msrpc_dcom2.nasl are enabled when you do a scan.
-- 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: 1.6 $");
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, 593);
exit(0);
}
#
# The script code starts here
#
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) - 24, strlen(r) - 20);
return error_code;
}
#---------------------------------------------------------------#
# 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));
display("error1=", hexstr(error1), "\n");
display("error2=", hexstr(error2), "\n");
display("error3=", hexstr(error3), "\n");
display("error4=", hexstr(error4), "\n");
if(hexstr(error2) == hexstr(error1))
{
if(hexstr(error1) == "0500078000")exit(0); # DCOM disabled
security_hole(port);
}
else {
set_kb_item(name:"SMB/KB824146", value:TRUE);
}
