CVE-2017-7820
Published: 2 October 2017
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.
Priority
Low
CVSS 3 base score: 5.3
Status
| Package | Release | Status |
|---|---|---|
|
firefox Launchpad, Ubuntu, Debian |
artful |
Released
(56.0+build6-0ubuntu1)
|
| bionic |
Released
(56.0+build6-0ubuntu1)
|
|
| precise |
Does not exist
|
|
| trusty |
Does not exist
(trusty was released [56.0+build6-0ubuntu0.14.04.1])
|
|
| upstream |
Released
(56.0)
|
|
| xenial |
Released
(56.0+build6-0ubuntu0.16.04.1)
|
|
| zesty |
Released
(56.0+build6-0ubuntu0.17.04.1)
|