Debian: CVE-2021-38503: firefox-esr, thunderbird -- security update
8
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
12/08/2021
12/31/2021
12/30/2021
01/17/2022
Description
The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
Solution(s)
- debian-upgrade-firefox-esr
- debian-upgrade-thunderbird
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