CVE-2024-10459

What it actually does

Use-after-free condition triggered when accessibility features are enabled, resulting in memory corruption that can lead to a crash or arbitrary code execution.

Why it matters to the business

Potential remote code execution on systems running affected browser or plugin versions allows attackers to compromise user sessions, steal data, or install persistent malware, with higher urgency for organizations still using legacy Ubuntu 14.04 deployments of icedtea-web.

How an attack unfolds

An attacker crafts a malicious web page or document that enables accessibility APIs and triggers the freed memory access; the flaw has been referenced in 2024 zero-day exploitation campaigns by espionage and financially motivated actors targeting Mozilla products.

How to fix it

Upgrade icedtea-web on Ubuntu 14.04 LTS to version 1.5.3-0ubuntu0.14.04.1 or later; apply equivalent updates for Firefox ESR < 128.4, Firefox < 132, Thunderbird < 128.4, and Thunderbird < 132 where applicable.

How to confirm the fix worked

Verify installed package versions match or exceed the fixed releases; test that accessibility features no longer trigger crashes on crafted inputs; confirm update deployment via package manager logs.

Typical attack path

1. Deliver malicious content via web page or email attachment that activates accessibility interfaces
2. Trigger the use-after-free condition in the affected browser or plugin
3. Achieve memory corruption leading to code execution or crash
4. Establish foothold for data theft or further persistence

How to detect it

Review browser and plugin crash logs for accessibility-related use-after-free signatures; correlate with threat actor indicators from 2024 zero-day campaigns; inspect network traffic and process creation events around the time of suspected access.

What your security team should do

• Immediately update all instances of icedtea-web on Ubuntu 14.04 to the fixed version
• Prioritize patching any remaining Firefox or Thunderbird instances below the stated versions
• Monitor threat intelligence feeds for ongoing exploitation by espionage or financially motivated actors
• Disable accessibility features if not required as a temporary mitigation