CVE-2020-15664 Security feature bypass in Firefox

What is CVE-2020-15664?

CVE-2020-15664 is a medium-severity vulnerability in Mozilla Firefox, published on 1 Oct 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

By holding a reference to the eval() function from an about:blank window, a malicious webpage could have gained access to the InstallTrigger object which would allow them to prompt the user to install an extension. Combined with user confusion, this could result in an unintended or malicious extension being installed. This vulnerability affects Firefox < 80, Thunderbird < 78.2, Thunderbird < 68.12, Firefox ESR < 68.12, Firefox ESR < 78.2, and Firefox for Android < 80.

Weakness: CWE-863

Which versions are affected by CVE-2020-15664?

It affects 4 products.

Products include Mozilla Firefox, Mozilla Firefox Esr, Mozilla Firefox Mobile, Mozilla Thunderbird.

How do I fix CVE-2020-15664?

Upgrade to a fixed version.

Is CVE-2020-15664 being exploited?

There is no known exploitation of CVE-2020-15664 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2020-15664, GHSA-f4gc-pc7j-rfxr, UBUNTU-CVE-2020-15664.