9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.147 Low
EPSS
Percentile
95.8%
The version of Microsoft Malware Protection Engine (MMPE) installed on the remote Windows host is prior to 1.1.14405.2. It is, therefore, affected by a remote code execution vulnerability.
Note that Nessus has checked if a vulnerable version of MMPE is being used by any of the following applications :
Microsoft Forefront Endpoint Protection 2010
Microsoft Forefront Endpoint Protection
Microsoft Exchange Server 2013 and 2016
Microsoft Endpoint Protection
Microsoft Security Essentials
Windows Defender for Windows 7, Windows 8.1, Windows 10, Windows 10 1511, Windows 10 1607, Windows 10 1703, Windows 10 1709, and Windows Server 2016(SC)
Windows Intune Endpoint Protection
Also note: Systems running supported versions of Windows Server 2008 R2 are not affected if the Desktop Experience feature is not installed.
#
# (C) Tenable Network Security, Inc.
#
include("compat.inc");
if (description)
{
script_id(105109);
script_version("1.9");
script_cvs_date("Date: 2019/11/12");
script_cve_id("CVE-2017-11937", "CVE-2017-11940");
script_bugtraq_id(102070, 102104);
script_name(english:"Microsoft Malware Protection Engine < 1.1.14405.2 RCE");
script_summary(english:"Checks the engine version.");
script_set_attribute(attribute:"synopsis", value:
"An antimalware application installed on the remote host is affected by
a remote code execution vulnerability.");
script_set_attribute(attribute:"description", value:
"The version of Microsoft Malware Protection Engine (MMPE) installed
on the remote Windows host is prior to 1.1.14405.2. It is, therefore,
affected by a remote code execution vulnerability.
Note that Nessus has checked if a vulnerable version of MMPE is being
used by any of the following applications :
- Microsoft Forefront Endpoint Protection 2010
- Microsoft Forefront Endpoint Protection
- Microsoft Exchange Server 2013 and 2016
- Microsoft Endpoint Protection
- Microsoft Security Essentials
- Windows Defender for Windows 7, Windows 8.1,
Windows 10, Windows 10 1511, Windows 10 1607,
Windows 10 1703, Windows 10 1709, and Windows Server 2016(SC)
- Windows Intune Endpoint Protection
Also note: Systems running supported versions of Windows Server 2008
R2 are not affected if the Desktop Experience feature is not installed.");
# https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11937
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?dd2497a7");
# https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-11940
script_set_attribute(attribute:"see_also", value:"http://www.nessus.org/u?2d42ad9f");
script_set_attribute(attribute:"solution", value:
"Enable automatic updates to update the scan engine for the relevant
antimalware applications. Refer to Knowledge Base Article 2510781 for
information on how to verify that MMPE has been updated.");
script_set_cvss_base_vector("CVSS2#AV:N/AC:M/Au:N/C:C/I:C/A:C");
script_set_cvss_temporal_vector("CVSS2#E:H/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H");
script_set_cvss3_temporal_vector("CVSS:3.0/E:H/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2017-11940");
script_set_attribute(attribute:"exploitability_ease", value:"Exploits are available");
script_set_attribute(attribute:"exploit_available", value:"true");
script_set_attribute(attribute:"exploited_by_malware", value:"true");
script_set_attribute(attribute:"vuln_publication_date", value:"2017/12/06");
script_set_attribute(attribute:"patch_publication_date", value:"2017/12/06");
script_set_attribute(attribute:"plugin_publication_date", value:"2017/12/08");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"cpe:/o:microsoft:windows");
script_set_attribute(attribute:"cpe", value:"cpe:/a:microsoft:malware_protection_engine");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"Windows");
script_copyright(english:"This script is Copyright (C) 2017-2019 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("smb_hotfixes.nasl", "fcs_installed.nasl");
script_require_keys("SMB/Registry/Enumerated");
script_require_ports(139, 445);
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("misc_func.inc");
include("smb_func.inc");
get_kb_item_or_exit("SMB/Registry/Enumerated");
# indicates if any antimalware products were found. this is used
# to determine whether or not the plugin should check if defender is affected
antimalware_installed = FALSE;
# Connect to the appropriate share.
port = kb_smb_transport();
login = kb_smb_login();
pass = kb_smb_password();
domain = kb_smb_domain();
if(! smb_session_init()) audit(AUDIT_FN_FAIL, 'smb_session_init');
rc = NetUseAdd(login:login, password:pass, domain:domain, share:"IPC$");
if (rc != 1)
{
NetUseDel();
audit(AUDIT_SHARE_FAIL, "IPC$");
}
# Connect to remote registry.
hklm = RegConnectRegistry(hkey:HKEY_LOCAL_MACHINE);
if (isnull(hklm))
{
NetUseDel();
audit(AUDIT_REG_FAIL);
}
# Figure out where it is installed.
path = NULL;
info = '';
info2 = '';
engine_version = NULL;
fixed_engine_version = "1.1.14405.2";
last_vulnerable = "1.1.14306.0";
# Forefront Client Security (either both or neither of these will be in the KB)
engine_version = get_kb_item("Antivirus/Forefront_Client_Security/engine_version");
fcs_path = get_kb_item("Antivirus/Forefront_Client_Security/path");
if (!isnull(engine_version))
{
antimalware_installed = TRUE;
if (ver_compare(ver:engine_version, fix:last_vulnerable) <= 0)
{
info +=
'\n Product : Microsoft Forefront Client Security'+
'\n Path : ' + fcs_path +
'\n Installed version : ' + engine_version +
'\n Fixed version : ' + fixed_engine_version + '\n';
}
else info2 += 'Microsoft Forefront Client Security with MMPE version '+ engine_version + ". ";
}
# Microsoft Security Essentials
# Forefront Endpoint Protection
# System Center Endpoint Protection
engine_version = NULL;
NetUseDel(close:FALSE);
rc = NetUseAdd(login:login, password:pass, domain:domain, share:"IPC$");
if (rc != 1)
{
NetUseDel();
audit(AUDIT_SHARE_FAIL, "IPC$");
}
# Connect to remote registry again.
hklm = RegConnectRegistry(hkey:HKEY_LOCAL_MACHINE);
if (isnull(hklm))
{
NetUseDel();
audit(AUDIT_REG_FAIL);
}
key = "SOFTWARE\Microsoft\Microsoft Antimalware\Signature Updates";
key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
value = RegQueryValue(handle:key_h, item:"EngineVersion");
if (!isnull(value)) engine_version = value[1];
RegCloseKey(handle:key_h);
}
path = NULL;
key = "SOFTWARE\Microsoft\Microsoft Antimalware";
key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
value = RegQueryValue(handle:key_h, item:"InstallLocation");
if (!isnull(value)) path = value[1];
RegCloseKey(handle:key_h);
}
if(!isnull(path))
{
found = 0;
# Check if the main exe exists.
share = ereg_replace(pattern:"^([A-Za-z]):.*", replace:"\1$", string:path);
exe = ereg_replace(pattern:"^[A-Za-z]:(.*)", replace:"\1\MsMpEng.exe", string:path);
NetUseDel(close:FALSE);
rc = NetUseAdd(login:login, password:pass, domain:domain, share:share);
if (rc != 1)
{
NetUseDel();
audit(AUDIT_SHARE_FAIL, share);
}
fh = CreateFile(
file:exe,
desired_access:GENERIC_READ,
file_attributes:FILE_ATTRIBUTE_NORMAL,
share_mode:FILE_SHARE_READ,
create_disposition:OPEN_EXISTING
);
if (!isnull(fh))
{
antimalware_installed = TRUE;
found = 1;
CloseFile(handle:fh);
}
if (found && !isnull(engine_version))
{
if (ver_compare(ver:engine_version, fix:last_vulnerable) <= 0)
{
info +=
'\n Product : Microsoft Security Essentials / Forefront Endpoint Protection / System Center Endpoint Protection'+
'\n Path : ' + share[0] + ':' + exe +
'\n Installed version : ' + engine_version +
'\n Fixed version : ' + fixed_engine_version + '\n';
}
else info2 += 'Microsoft Security Essentials / Forefront Endpoint Protection / System Center Endpoint Protection with MMPE version ' + engine_version + ". ";
}
}
# Microsoft Windows Defender
# defender is apparently disabled when other antimalware products are installed,
# so it will only be checked if the plugin hasn't detected other products are present
if (!antimalware_installed)
{
defender_enabled = TRUE;
engine_version = NULL;
# Check if Windows Defender is disabled via group policy
key = "SOFTWARE\Policies\Microsoft\Windows Defender";
key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
value = RegQueryValue(handle:key_h, item:"DisableAntiSpyware");
if (!isnull(value))
{
if (value[1] > 0)
{
defender_enabled = FALSE;
}
}
RegCloseKey(handle:key_h);
}
key = "SOFTWARE\Microsoft\Windows Defender";
key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
value = RegQueryValue(handle:key_h, item:"DisableAntiSpyware");
if (!isnull(value))
{
if (value[1] > 0)
{
defender_enabled = FALSE;
}
}
RegCloseKey(handle:key_h);
}
if (defender_enabled)
{
key = "SOFTWARE\Microsoft\Windows Defender\Signature Updates";
key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
value = RegQueryValue(handle:key_h, item:"EngineVersion");
if (!isnull(value)) engine_version = value[1];
RegCloseKey(handle:key_h);
}
path = NULL;
key = "SOFTWARE\Microsoft\Windows Defender\Signature Updates";
key_h = RegOpenKey(handle:hklm, key:key, mode:MAXIMUM_ALLOWED);
if (!isnull(key_h))
{
value = RegQueryValue(handle:key_h, item:"SignatureLocation");
if (!isnull(value)) path = value[1];
RegCloseKey(handle:key_h);
}
if(!isnull(path))
{
found = 0;
defender_dll = NULL;
# Check the version of the main exe.
share = ereg_replace(pattern:"^([A-Za-z]):.*", replace:"\1$", string:path);
# this is the path smb_kb4022344.nasl checks
dll1 = ereg_replace(pattern:"^[A-Za-z]:(.+Windows Defender\\Definition Updates).+", replace:"\1\Default\MpEngine.dll", string:path);
# this path works for Windows Defender on Windows 8
dll2 = ereg_replace(pattern:"^[A-Za-z]:(.+)$", replace:"\1\MpEngine.dll", string:path);
NetUseDel(close:FALSE);
rc = NetUseAdd(login:login, password:pass, domain:domain, share:share);
if (rc != 1)
{
NetUseDel();
audit(AUDIT_SHARE_FAIL, share);
}
fh = CreateFile(
file:dll1,
desired_access:GENERIC_READ,
file_attributes:FILE_ATTRIBUTE_NORMAL,
share_mode:FILE_SHARE_READ,
create_disposition:OPEN_EXISTING
);
if (!isnull(fh))
{
found =1 ;
defender_dll = share[0] + ':' + dll1;
CloseFile(handle:fh);
}
if (found == 0)
{
fh = CreateFile(
file:dll2,
desired_access:GENERIC_READ,
file_attributes:FILE_ATTRIBUTE_NORMAL,
share_mode:FILE_SHARE_READ,
create_disposition:OPEN_EXISTING
);
if (!isnull(fh))
{
found =1 ;
defender_dll = share[0] + ':' + dll2;
CloseFile(handle:fh);
}
}
if (found && !isnull(engine_version))
{
if (ver_compare(ver:engine_version, fix:last_vulnerable) <= 0)
{
info +=
'\n Product : Microsoft Windows Defender'+
'\n Path : ' + defender_dll +
'\n Installed version : ' + engine_version +
'\n Fixed version : ' + fixed_engine_version + '\n';
}
else info2 += 'Microsoft Windows Defender with MMPE version ' + engine_version + ". ";
}
}
}
}
RegCloseKey(handle:hklm);
NetUseDel();
if (info)
{
report = '\n' +
"Nessus found following vulnerable product(s) installed :" +'\n'+
info;
security_report_v4(severity:SECURITY_HOLE, port:port, extra:report);
exit(0);
}
else if(info2) exit(0,"The following instance(s) of MMPE are installed and not vulnerable : "+ info2);
else exit(0, "Nessus could not find evidence of affected Microsoft antimalware products installed.");
Vendor | Product | Version | CPE |
---|---|---|---|
microsoft | windows | cpe:/o:microsoft:windows | |
microsoft | malware_protection_engine | cpe:/a:microsoft:malware_protection_engine |
9.3 High
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
7.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
0.147 Low
EPSS
Percentile
95.8%