Vulnerability Description
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 72.0 |
| Mozilla | Firefox Esr | < 68.4 |
| Debian | Debian Linux | 8.0 |
| Canonical | Ubuntu Linux | 16.04 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server Aus | 7.7 |
| Redhat | Enterprise Linux Server Tus | 7.7 |
| Redhat | Enterprise Linux Workstation | 6.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00029.html
- http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00043.html
- http://packetstormsecurity.com/files/155912/Slackware-Security-Advisory-mozilla-
- https://access.redhat.com/errata/RHSA-2020:0085Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0086Third Party Advisory
- https://access.redhat.com/errata/RHSA-2020:0111
- https://access.redhat.com/errata/RHSA-2020:0120
- https://access.redhat.com/errata/RHSA-2020:0123
- https://access.redhat.com/errata/RHSA-2020:0127
- https://access.redhat.com/errata/RHSA-2020:0292
- https://access.redhat.com/errata/RHSA-2020:0295
- https://bugzilla.mozilla.org/show_bug.cgi?id=1599181Permissions Required
- https://lists.debian.org/debian-lts-announce/2020/01/msg00005.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/01/msg00016.html
- https://seclists.org/bugtraq/2020/Jan/12Mailing ListThird Party Advisory
FAQ
What is CVE-2019-17016?
CVE-2019-17016 is a vulnerability with a CVSS score of 6.1 (MEDIUM). When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites res...
How severe is CVE-2019-17016?
CVE-2019-17016 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-17016?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Mozilla Firefox Esr, Debian Debian Linux, Canonical Ubuntu Linux, Redhat Enterprise Linux Desktop.