CVE-2020-6829 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1631583 https://www.mozilla.org/security/advisories/mfsa2020-36/ https://www.mozilla.org/security/advisories/mfsa2020-39/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3