CVE-2019-17022
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2019-17022
Vendor advisory: arch — https://security.archlinux.org/ASA-202001-1
Vendor advisory: arch — https://security.archlinux.org/ASA-202001-4
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 68.4.1-1 | |
| debian | sid | fixed | 72.0-1 |
| debian | bookworm | fixed | 68.4.0esr-1 |
| debian | bullseye | fixed | 68.4.0esr-1 |
| debian | forky | fixed | 68.4.0esr-1 |
| debian | trixie | fixed | 68.4.0esr-1 |
References
Verify integrity in audit chain (admin only). AS-IS.