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MFSA2021-05 Thunderbird: Security Vulnerabilities fixed in Thunderbird 78.7 (CVE-2020-26976)

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MFSA2021-05 Thunderbird: Security Vulnerabilities fixed in Thunderbird 78.7 (CVE-2020-26976)

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
01/07/2021
Created
01/28/2021
Added
01/27/2021
Modified
02/03/2021

Description

When a HTTPS pages was embedded in a HTTP page, and there was a service worker registered for the former, the service worker could have intercepted the request for the secure page despite the iframe not being a secure context due to the (insecure) framing. This vulnerability affects Firefox < 84.

Solution(s)

  • mozilla-thunderbird-upgrade-78_7

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