Vulnerability Description
If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL sheet e.g. includes JavaScript, it would bypass any of the restrictions of the Content Security Policy applied to the XML document. This vulnerability affects Firefox < 72.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | < 72.0 |
| Canonical | Ubuntu Linux | 16.04 |
Related Weaknesses (CWE)
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1597645Permissions Required
- https://usn.ubuntu.com/4234-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-01/Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1597645Permissions Required
- https://usn.ubuntu.com/4234-1/Third Party Advisory
- https://www.mozilla.org/security/advisories/mfsa2020-01/Vendor Advisory
FAQ
What is CVE-2019-17020?
CVE-2019-17020 is a vulnerability with a CVSS score of 6.5 (MEDIUM). If an XML file is served with a Content Security Policy and the XML file includes an XSL stylesheet, the Content Security Policy will not be applied to the contents of the XSL stylesheet. If the XSL s...
How severe is CVE-2019-17020?
CVE-2019-17020 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-17020?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox, Canonical Ubuntu Linux.