Firefox ESR: When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not…
CVE-2019-17022 is fixed in 10 products on 2 platforms, first by firefox 72.0.1+build1-0ubuntu0.18.04.1, released January 8, 2020. It is not reported as exploited. Patch Radar priority: Urgent.
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and > characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 78.0esr | Mozilla Firefox ESR (en-US) 78.0esr | Jun 25, 2020 |
| Linux | |||
| firefox · RHEL 8 | 0:68.4.1-1.el8_1 | RHSA-2020:0111 | Jan 14, 2020 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| firefox · ol 8 | 0:68.4.1-1.0.1.el8_1 | ELSA-2020-0111 | Jan 15, 2020 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox-geckodriver 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox-geckodriver 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 72.0.1+build1-0ubuntu0.18.04.1 | firefox-mozsymbols 72.0.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 72.0.1+build1-0ubuntu1 | firefox-mozsymbols 72.0.1+build1-0ubuntu1 | Jan 8, 2020 |
| thunderbird · RHEL 8 | 0:68.4.1-2.el8_1 | RHSA-2020:0127 | Jan 16, 2020 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | thunderbird 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | thunderbird 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| thunderbird · ol 8 | 0:68.4.1-2.0.1.el8_1 | ELSA-2020-0127 | Jan 18, 2020 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | thunderbird-gnome-support 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | thunderbird-mozsymbols 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | xul-ext-calendar-timezones 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | xul-ext-gdata-provider 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:68.4.1+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:68.4.1+build1-0ubuntu0.18.04.1 | Jan 8, 2020 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:68.4.1+build1-0ubuntu1 | xul-ext-lightning 1:68.4.1+build1-0ubuntu1 | Jan 8, 2020 |
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