PT-2020-3494
CVE-2020-12387
·
Published
2020-05-05
·
Updated
2026-10-31
Description by
CVSS 3.1
8.1
HighMetricsAV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions
Firefox ESR versions prior to 68.8
Firefox versions prior to 76
Thunderbird versions prior to 68.8.0
Description
A race condition when running shutdown code for Web Worker led to a use-after-free issue, resulting in a potentially exploitable crash. This could allow a remote attacker to cause a denial of service.
Recommendations
For Firefox ESR versions prior to 68.8, update to version 68.8 or later.
For Firefox versions prior to 76, update to version 76 or later.
For Thunderbird versions prior to 68.8.0, update to version 68.8.0 or later.
Exploitability
Exploit
Fix
Impacts
Vendors
Affected products
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