CVE-2020-12401 Information disclosure in Firefox

What is CVE-2020-12401?

CVE-2020-12401 is a medium-severity vulnerability in Mozilla Firefox, published on 8 Oct 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

During ECDSA signature generation, padding applied in the nonce designed to ensure constant-time scalar multiplication was removed, resulting in variable-time execution dependent on secret data. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

Weakness: CWE-203

Which versions are affected by CVE-2020-12401?

It affects 2 products.

Products include Mozilla Firefox, Mozilla Firefox Mobile.

How do I fix CVE-2020-12401?

Upgrade to a fixed version.

Is CVE-2020-12401 being exploited?

There is no known exploitation of CVE-2020-12401 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 ALPINE-CVE-2020-12401, DEBIAN-CVE-2020-12401, GHSA-cm2q-67xf-jw8c, UBUNTU-CVE-2020-12401.