CVE-2020-6829 Information disclosure in Firefox

What is CVE-2020-6829?

CVE-2020-6829 is a medium-severity vulnerability in Mozilla Firefox, published on 28 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

When performing EC scalar point multiplication, the wNAF point multiplication algorithm was used; which leaked partial information about the nonce used during signature generation. Given an electro-magnetic trace of a few signature generations, the private key could have been computed. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

Which versions are affected by CVE-2020-6829?

It affects 2 products.

Products include Mozilla Firefox, Mozilla Firefox Mobile.

How do I fix CVE-2020-6829?

Upgrade to a fixed version.

Is CVE-2020-6829 being exploited?

There is no known exploitation of CVE-2020-6829 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-2020-6829, DEBIAN-CVE-2020-6829, GHSA-cc99-55qg-f87r, UBUNTU-CVE-2020-6829.