CVE-2017-7820

Priority
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.
Assigned-to
chrisccoulson
Package
Upstream:released (56.0)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 LTS (Trusty Tahr):released (56.0+build6-0ubuntu0.14.04.1)
Ubuntu 16.04 LTS (Xenial Xerus):released (56.0+build6-0ubuntu0.16.04.1)
Ubuntu 18.04 LTS (Bionic Beaver):released (56.0+build6-0ubuntu1)
Ubuntu 18.10 (Cosmic Cuttlefish):released (56.0+build6-0ubuntu1)
More Information

Updated: 2019-03-19 12:29:51 UTC (commit 15472795df7e9de45b82f2d36b8b419b939f97b2)