CVE-2020-6829

MEDIUM

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.

References

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/

Details

Source: MITRE

Published: 2020-10-28

Updated: 2020-11-03

Risk Information

CVSS v2.0

Base Score: 5

Vector: AV:N/AC:L/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 10

Severity: MEDIUM

CVSS v3.0

Base Score: 5.3

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

Impact Score: 1.4

Exploitability Score: 3.9

Severity: MEDIUM