CVEvulnerability
CVE-2017-7820
5.3 MEDIUM
Official page ↗
- Status
- Modified
- Published
- 2018-06-11
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.0 ([email protected])
- 5.3 MEDIUM — CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
Description
The "instanceof" operator can bypass the Xray wrapper mechanism. When called on web content from the browser itself or an extension the web content can provide its own result for that operator, possibly tricking the browser or extension into mishandling the element. This vulnerability affects Firefox < 56.
Affected configurations
• mozilla firefox (<= 55.0.3)
References
- http://www.securityfocus.com/bid/101057 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039465 Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1378207 Exploit, Issue Tracking
- https://www.mozilla.org/security/advisories/mfsa2017-21/ Vendor Advisory
- http://www.securityfocus.com/bid/101057 Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1039465 Third Party Advisory, VDB Entry
- https://bugzilla.mozilla.org/show_bug.cgi?id=1378207 Exploit, Issue Tracking
- https://www.mozilla.org/security/advisories/mfsa2017-21/ Vendor Advisory