CVE-2017-7820 Affecting firefox package, versions <56.0-1
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Test your applications- Snyk ID SNYK-DEBIANUNSTABLE-FIREFOX-423797
- published 11 Jun 2018
- disclosed 11 Jun 2018
Introduced: 11 Jun 2018
CVE-2017-7820 Open this link in a new tabHow to fix?
Upgrade Debian:unstable firefox to version 56.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2017-7820
- https://www.mozilla.org/security/advisories/mfsa2017-21/
- https://bugzilla.mozilla.org/show_bug.cgi?id=1378207
- http://www.securityfocus.com/bid/101057
- http://www.securitytracker.com/id/1039465
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2017-7820