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Threatist priority CRITICAL 2 HIGH 0 MEDIUM 0 LOW 0

Signals Exploited in the wild (KEV) 2 Patch available 2 No fix listed 0 Has CVE 2

Fix status Fixed 0 Partial 2 Will not fix 0 Deferred 0 No fix listed 0

Impact type Code execution 1 Privilege escalation 0 Security bypass 0 Information disclosure 0 Tampering 0 Denial of service 0 Spoofing 0 Cross-site scripting 0 SQL injection 0

Attack vector Network 2 Adjacent network 0 Local 0 Physical 0

Requirements No authentication 2 No user interaction 2

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Weakness (CWE) CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization 2 CWE-416 Use After Free 1

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Release: Mozilla Firefox, Firefox ESR 68.6.1, 74.0.1 × Clear all filters

TI-2020-05528 CVE-2020-6819 · GHSA-cv8q-mpvf-42h2

Use after free in Mozilla Thunderbird

Priority CRITICAL 94KEV

Under certain conditions, when running the nsDocShell destructor, a race condition can cause a use-after-free.

CVSS 3.1HIGH 8.1· Network · No auth · No interaction · EPSS 0.03039 · Published 2020-04-24 · Partial fix · 68.7.0, 74.0.1 +1 CWE-416

TI-2020-05529 CVE-2020-6820 · GHSA-f77r-rqc9-53hh

Race condition in Mozilla Thunderbird

Priority CRITICAL 94KEV

Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free.

CVSS 3.1HIGH 8.1· Network · No auth · No interaction · EPSS 0.07063 · Published 2020-04-24 · Partial fix · 68.7.0, 74.0.1 +1 CWE-362

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