Firefox ESR and 2 others: As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents…
CVE-2021-23969 is fixed in 11 products on 2 platforms, first by RHSA-2021:0655, released February 24, 2021. It is not reported as exploited. Patch Radar priority: Urgent.
As specified in the W3C Content Security Policy draft, when creating a violation report, "User agents need to ensure that the source file is the URL requested by the page, pre-redirects. If that’s not possible, user agents need to strip the URL down to an origin to avoid unintentional leakage." Under certain types of redirects, Firefox incorrectly set the source file to be the destination of the redirects. This was fixed to be the redirect destination's origin. This vulnerability affects Firefox < 86, Thunderbird < 78.8, and Firefox ESR < 78.8.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 91.0 | Mozilla Firefox ESR (en-US) 91.0 | Aug 4, 2021 |
| Mozilla Thunderbird (en-US) | 78.10.0 | Mozilla Thunderbird (en-US) 78.10.0 | Apr 15, 2021 |
| Linux | |||
| firefox · RHEL 8 | 0:78.8.0-1.el8_3 | RHSA-2021:0655 | Feb 24, 2021 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 86.0+build3-0ubuntu0.18.04.1 | firefox 86.0+build3-0ubuntu0.18.04.1 | Feb 26, 2021 |
| firefox · Ubuntu 20.04 LTS (focal) | 86.0+build3-0ubuntu0.20.04.1 | firefox 86.0+build3-0ubuntu0.20.04.1 | Feb 26, 2021 |
| firefox · ol 8 | 0:78.8.0-1.0.1.el8_3 | ELSA-2021-0655 | Feb 26, 2021 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 86.0+build3-0ubuntu0.18.04.1 | firefox-geckodriver 86.0+build3-0ubuntu0.18.04.1 | Feb 26, 2021 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 86.0+build3-0ubuntu0.20.04.1 | firefox-geckodriver 86.0+build3-0ubuntu0.20.04.1 | Feb 26, 2021 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 86.0+build3-0ubuntu0.18.04.1 | firefox-mozsymbols 86.0+build3-0ubuntu0.18.04.1 | Feb 26, 2021 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 86.0+build3-0ubuntu0.20.04.1 | firefox-mozsymbols 86.0+build3-0ubuntu0.20.04.1 | Feb 26, 2021 |
| thunderbird · RHEL 8 | 0:78.8.0-1.el8_3 | RHSA-2021:0657 | Feb 24, 2021 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | thunderbird 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:78.8.1+build1-0ubuntu0.20.04.1 | thunderbird 1:78.8.1+build1-0ubuntu0.20.04.1 | Apr 22, 2021 |
| thunderbird · ol 8 | 0:78.8.0-1.0.1.el8_3 | ELSA-2021-0657 | Feb 26, 2021 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:78.8.1+build1-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:78.8.1+build1-0ubuntu0.20.04.1 | Apr 22, 2021 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:78.8.1+build1-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:78.8.1+build1-0ubuntu0.20.04.1 | Apr 22, 2021 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:78.8.1+build1-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:78.8.1+build1-0ubuntu0.20.04.1 | Apr 22, 2021 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:78.8.1+build1-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:78.8.1+build1-0ubuntu0.20.04.1 | Apr 22, 2021 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:78.8.1+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:78.8.1+build1-0ubuntu0.18.04.1 | Apr 22, 2021 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:78.8.1+build1-0ubuntu0.20.04.1 | xul-ext-lightning 1:78.8.1+build1-0ubuntu0.20.04.1 | Apr 22, 2021 |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.