CVE-2020-12405 Race condition in Firefox

What is CVE-2020-12405?

CVE-2020-12405 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 9 Jul 2020. 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

When browsing a malicious page, a race condition in our SharedWorkerService could occur and lead to a potentially exploitable crash. This vulnerability affects Thunderbird < 68.9.0, Firefox < 77, and Firefox ESR < 68.9.

Weakness: CWE-416, CWE-362

Which versions are affected by CVE-2020-12405?

It affects 4 products.

Products include Canonical Ubuntu Linux, Mozilla Firefox, Mozilla Firefox Esr, Mozilla Thunderbird.

How do I fix CVE-2020-12405?

Upgrade to a fixed version.

Is CVE-2020-12405 being exploited?

There is no known exploitation of CVE-2020-12405 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-2020-12405, GHSA-7768-mfm4-9cmv, UBUNTU-CVE-2020-12405.