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Ubuntu: (Multiple Advisories) (CVE-2020-26967): Firefox vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2020-26967): Firefox vulnerabilities

Severity
4
CVSS
(AV:N/AC:M/Au:N/C:N/I:P/A:N)
Published
11/18/2020
Created
11/21/2020
Added
11/19/2020
Modified
03/22/2023

Description

When listening for page changes with a Mutation Observer, a malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page. This would lead to internal errors and unexpected behavior in the Screenshots code. This vulnerability affects Firefox < 83.

Solution(s)

  • ubuntu-upgrade-firefox

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