CVE-2018-12358 Information disclosure in Firefox

What is CVE-2018-12358?

CVE-2018-12358 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 18 Oct 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Service workers can use redirection to avoid the tainting of cross-origin resources in some instances, allowing a malicious site to read responses which are supposed to be opaque. This vulnerability affects Firefox < 61.

Weakness: CWE-200

Which versions are affected by CVE-2018-12358?

It affects 2 products.

Products include Canonical Ubuntu Linux, Mozilla Firefox.

How do I fix CVE-2018-12358?

Upgrade to a fixed version.

Is CVE-2018-12358 being exploited?

There is no known exploitation of CVE-2018-12358 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 GHSA-3cx6-6fxx-6j34, UBUNTU-CVE-2018-12358.