CVE-2020-12387 (NVD)

2020-05-26

A race condition when running shutdown code for Web Worker led to a use-after-free vulnerability. This resulted in a potentially exploitable crash. This vulnerability affects Firefox ESR < 68.8, Firefox < 76, and Thunderbird < 68.8.0.

Products Firefox, Firefox_esr, Thunderbird
Type Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') (CWE-362)
Use After Free (CWE-416)
First patch - None (likely due to unavailable code)
Links • https://bugzilla.mozilla.org/show_bug.cgi?id=1545345
• https://www.mozilla.org/security/advisories/mfsa2020-17/
• https://security.gentoo.org/glsa/202005-03
• https://www.mozilla.org/security/advisories/mfsa2020-16/
• https://usn.ubuntu.com/4373-1/