| code | #
# (C) Tenable Network Security, Inc
#
include("compat.inc");
if (description)
{
script_id(63155);
script_version("1.22");
script_set_attribute(attribute:"plugin_modification_date", value:"2020/06/12");
script_cve_id("CVE-2013-1609", "CVE-2014-0759", "CVE-2014-5455");
script_bugtraq_id(58591, 58617, 65873, 68520);
script_xref(name:"ICSA", value:"14-058-01");
script_xref(name:"EDB-ID", value:"34037");
script_name(english:"Microsoft Windows Unquoted Service Path Enumeration");
script_summary(english:"Generic check for unquoted service paths.");
script_set_attribute(attribute:"synopsis", value:
"The remote Windows host has at least one service installed that uses
an unquoted service path.");
script_set_attribute(attribute:"description", value:
"The remote Windows host has at least one service installed that uses
an unquoted service path, which contains at least one whitespace. A
local attacker can gain elevated privileges by inserting an executable
file in the path of the affected service.
Note that this is a generic test that will flag any application
affected by the described vulnerability.");
# https://isc.sans.edu/diary/Help+eliminate+unquoted+path+vulnerabilities/14464
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?84a4cc1c");
script_set_attribute(attribute:"see_also", value:"http://cwe.mitre.org/data/definitions/428.html");
script_set_attribute(attribute:"see_also", value:"https://www.commonexploits.com/unquoted-service-paths/");
# http://www.ryanandjeffshow.com/blog/2013/04/11/powershell-fixing-unquoted-service-paths-complete/
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?4aa6acbc");
script_set_attribute(attribute:"solution", value:
"Ensure that any services that contain a space in the path enclose the
path in quotes.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:POC/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:P/RL:O/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"metasploit_name", value:'Windows Service Trusted Path Privilege Escalation');
script_set_attribute(attribute:"exploit_framework_metasploit", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2012/09/15");
script_set_attribute(attribute:"plugin_publication_date", value:"2012/12/05");
script_set_attribute(attribute:"plugin_type", value:"local");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2012-2020 Tenable Network Security, Inc.");
script_dependencies("smb_enum_services_params.nasl", "symantec_encryption_desktop_sym13-010.nasl", "symantec_enterprise_security_manager_sym12-020.nasl", "symantec_wsa_sym15-004.nasl");
script_require_keys("SMB/Services/Enumerated");
exit(0);
}
include("audit.inc");
include("misc_func.inc");
include("global_settings.inc");
include("smb_func.inc");
function extract_service_path()
{
local_var item, idx;
item = _FCT_ANON_ARGS[0];
# If the first character is a '"', the path is enclosed, so just use
# that to extract the path
if (item =~ '^"')
{
item = ereg_replace(pattern:'^("[^"]+").*', string:item, replace:"\1");
}
else
{
# First extract any extra paths from the arguments
item = ereg_replace(pattern:'^(\\s+)?("?([A-Za-z]:|\\\\)\\\\[^:]+).*', string:item, replace:"\2");
# Service arguments use '-' or '/' characters for flags
# First look for '/' flags
if ('/' >< item)
{
idx = stridx(item, '/');
item = item - substr(item, idx);
}
# Now look for ' -' flags
if (' -' >< item)
{
idx = stridx(item, ' -');
item = item - substr(item, idx);
}
# Some arguments don't use a flag
item = ereg_replace(pattern:'^(([A-Za-z]:|\\\\)\\\\.*\\\\[^\\.]+\\.[^\\s]+).*', string:item, replace:"\1");
}
return item;
}
slist = get_kb_list_or_exit('SMB/svc/*/startuptype');
services = make_list();
# Unless we are paranoid, only focus on the services that
# aren't disabled
if (report_paranoia < 2)
{
foreach service (keys(slist))
{
if (slist[service] == 2 || slist[service] == 3)
{
services = make_list(services, service - 'SMB/svc/' - '/startuptype');
}
}
}
else
{
foreach service (keys(slist))
{
services = make_list(services, service - 'SMB/svc/' - '/startuptype');
}
}
# Ignore services that we are explicitly checking in other
# plugins
items = get_kb_list('SMB/Unquoted/*');
unquoted = make_array();
if (!isnull(items))
{
foreach key (keys(items))
{
key = key - 'SMB/Unquoted/';
unquoted[key] = TRUE;
}
}
# Loop over the services and check the executable path
path = '';
info = '';
for (i=0; i < max_index(services); i++)
{
# We have a separate check for the PGP RDD Service
service = services[i];
if (unquoted[service]) continue;
item = get_kb_item('SMB/svc/'+services[i]+'/path');
if (isnull(item)) continue;
# Parse the service to get the path
path = extract_service_path(item);
# If there is a space in the path and it isn't enclosed in '"'
# there is a problem
if (' ' >< path && path !~ '^".*"$')
{
# Make sure the whitespace isn't only at the end of the path
if (path !~ '^[^\\s]+\\s+$')
{
info += ' ' + services[i] + ' : ' + path + '\n';
}
}
}
if (info)
{
port = get_kb_item('SMB/transport');
if (report_verbosity > 0)
{
if (max_index(split(info, sep:'\n')) > 1) s = 's ';
else s = ' ';
report =
'\nNessus found the following service' + s + 'with an untrusted path : ' +
'\n' +
info +
'\n';
security_warning(port:port, extra:report);
}
else security_warning(port);
exit(0);
}
else audit(AUDIT_HOST_NOT, 'affected');
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