MS03-034: Flaw in NetBIOS Could Lead to Information Disclosure (824105) (uncredentialed check)

#
# (C) Tenable Network Security, Inc.
#

include("compat.inc");

if (description)
{
 script_id(11830);
 script_version("1.31");
 script_cvs_date("Date: 2018/11/15 20:50:27");

 script_cve_id("CVE-2003-0661");
 script_bugtraq_id(8532);
 script_xref(name:"MSFT", value:"MS03-034");
 script_xref(name:"MSKB", value:"824105");

 script_name(english:"MS03-034: Flaw in NetBIOS Could Lead to Information Disclosure (824105) (uncredentialed check)");
 script_summary(english:"Tests the NetBT NS mem disclosure");

 script_set_attribute(attribute:"synopsis", value:
"The remote service is affected by an information disclosure
vulnerability.");
 script_set_attribute(attribute:"description", value:
"The remote host is running a version of the NetBT name service that
suffers from a memory disclosure problem.

An attacker may send a special packet to the remote NetBT name
service, and the reply will contain random arbitrary data from the
remote host memory. This arbitrary data may be a fragment from the web
page the remote user is viewing, or something more serious like a
password.

An attacker may use this flaw to continuously 'poll' the content of
the memory of the remote host and might be able to obtain sensitive
information.");
 script_set_attribute(attribute:"see_also", value:"https://docs.microsoft.com/en-us/security-updates/SecurityBulletins/2003/ms03-034");
 script_set_attribute(attribute:"solution", value:"Microsoft has released patches for Windows NT, 2000, XP, and 2003.");
 script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N");
 script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
 script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
 script_set_attribute(attribute:"exploit_available", value:"false");

 script_set_attribute(attribute:"vuln_publication_date", value:"2003/09/03");
 script_set_attribute(attribute:"plugin_publication_date", value:"2003/09/04");

 script_set_attribute(attribute:"potential_vulnerability", value:"true");
 script_set_attribute(attribute:"plugin_type", value:"remote");
 script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_2000");
 script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_2003");
 script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_nt:4.0");
 script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows_xp");
 script_end_attributes();

 script_category(ACT_GATHER_INFO);

 script_copyright(english:"This script is Copyright (C) 2003-2018 Tenable Network Security, Inc.");
 script_family(english:"Windows");

 script_dependencie("netbios_name_get.nasl");
 script_require_keys("SMB/NetBIOS/137", "Settings/ParanoidReport");

 exit(0);
}

include("audit.inc");
include("global_settings.inc");

if (report_paranoia < 2) audit(AUDIT_PARANOID);

NETBIOS_LEN = 50;

sendata = raw_string(
rand()%255, rand()%255, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x20, 0x43, 0x4B,
0x41, 0x41, 0x41, 0x41, 0x41,
0x41, 0x41, 0x41, 0x41, 0x41,
0x41, 0x41, 0x41, 0x41, 0x41,
0x41, 0x41, 0x41, 0x41, 0x41,
0x41, 0x41, 0x41, 0x41, 0x41,
0x41, 0x41, 0x41, 0x41, 0x41,
0x00, 0x00, 0x21, 0x00, 0x01
			);


if(!(get_udp_port_state(137))){
	exit(0);
	}

soc = open_sock_udp(137);
send(socket:soc, data:sendata, length:NETBIOS_LEN);

result = recv(socket:soc, length:4096);
if(strlen(result) > 58)
{
 pad = hexstr(substr(result, strlen(result) - 58, strlen(result)));
 close(soc);

 sleep(1);

 soc2 = open_sock_udp(137);
 if(!soc2)exit(0);
 send(socket:soc2, data:sendata, length:NETBIOS_LEN);
 result = recv(socket:soc2, length:4096);
 if(strlen(result) > 58)
 {
  pad2 = hexstr(substr(result, strlen(result) - 58, strlen(result)));
  if(pad != pad2)security_warning(port:137, proto:"udp");
 }
}