Double Free The advisory has been revoked - it doesn't affect any version of package thunderbird  (opens in a new tab)


Threat Intelligence

Exploit Maturity
Attacked
EPSS
4.41% (89th percentile)

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  • Snyk IDSNYK-UBUNTU2004-THUNDERBIRD-583204
  • published3 Apr 2020
  • disclosed24 Apr 2020

Introduced: 3 Apr 2020

CVE-2020-6820  (opens in a new tab)
CWE-415  (opens in a new tab)

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Ubuntu.

Under certain conditions, when handling a ReadableStream, a race condition can cause a use-after-free. We are aware of targeted attacks in the wild abusing this flaw. This vulnerability affects Thunderbird < 68.7.0, Firefox < 74.0.1, and Firefox ESR < 68.6.1.