CVE-2020-6829

Published: 5 August 2020

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.

Notes

Author	Note
leosilva	same fix/patches of CVE-2020-12400

Priority

Cvss 3 Severity Score

5.3

Score breakdown

Status

Package	Release	Status
nss Launchpad, Ubuntu, Debian	bionic	Released (2:3.35-2ubuntu2.11)
	focal	Released (2:3.49.1-1ubuntu1.4)
	trusty	Released (2:3.28.4-0ubuntu0.14.04.5+esm7) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	upstream	Released (2:3.55-1)
	xenial	Released (2:3.28.4-0ubuntu0.16.04.13)
	Patches: upstream: https://hg.mozilla.org/projects/nss/rev/e55ab3145546ae3cf1333b43956a974675d2d25c upstream: https://hg.mozilla.org/projects/nss/rev/3f022d5eca5d3cd0e366a825a5681953d76299d0
firefox Launchpad, Ubuntu, Debian	upstream	Released (80)
	trusty	Does not exist
	xenial	Released (80.0+build2-0ubuntu0.16.04.1)
	bionic	Released (80.0+build2-0ubuntu0.18.04.1)
	focal	Released (80.0+build2-0ubuntu0.20.04.1)

Severity score breakdown

Parameter	Value
Base score	5.3
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

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