CVE-2018-12397 Security feature bypass in Firefox

What is CVE-2018-12397?

CVE-2018-12397 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 28 Feb 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A WebExtension can request access to local files without the warning prompt stating that the extension will "Access your data for all websites" being displayed to the user. This allows extensions to run content scripts in local pages without permission warnings when a local file is opened. This vulnerability affects Firefox ESR < 60.3 and Firefox < 63.

Weakness: CWE-200

Which versions are affected by CVE-2018-12397?

It affects 7 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Mozilla Firefox, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Eus and 1 more.

How do I fix CVE-2018-12397?

Upgrade to a fixed version.

Is CVE-2018-12397 being exploited?

There is no known exploitation of CVE-2018-12397 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-12397, GHSA-xxh5-92qj-c4gh, UBUNTU-CVE-2018-12397.