Vulnerability Description
A vulnerability where WebExtensions can download and attempt to open a file of some non-executable file types. This can be triggered without specific user interaction for the file download and open actions. This could be used to trigger known vulnerabilities in the programs that handle those document types. This vulnerability affects Firefox < 56.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | <= 55.0.3 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/101057Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039465Third Party AdvisoryVDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1346515ExploitIssue Tracking
- https://www.mozilla.org/security/advisories/mfsa2017-21/Vendor Advisory
- http://www.securityfocus.com/bid/101057Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1039465Third Party AdvisoryVDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1346515ExploitIssue Tracking
- https://www.mozilla.org/security/advisories/mfsa2017-21/Vendor Advisory
FAQ
What is CVE-2017-7821?
CVE-2017-7821 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A vulnerability where WebExtensions can download and attempt to open a file of some non-executable file types. This can be triggered without specific user interaction for the file download and open ac...
How severe is CVE-2017-7821?
CVE-2017-7821 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2017-7821?
Check the references section above for vendor advisories and patch information. Affected products include: Mozilla Firefox.