CVE-2020-12400

Published: 5 August 2020

When converting coordinates from projective to affine, the modular inversion was not performed in constant time, resulting in a possible timing-based side channel attack. This vulnerability affects Firefox < 80 and Firefox for Android < 80.

Priority

Cvss 3 Severity Score

4.7

Score breakdown

Status

Package	Release	Status
nss Launchpad, Ubuntu, Debian	upstream	Released (2:3.55-1)
	trusty	Released (2:3.28.4-0ubuntu0.14.04.5+esm7) Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
	xenial	Released (2:3.28.4-0ubuntu0.16.04.13)
	bionic	Released (2:3.35-2ubuntu2.11)
	focal	Released (2:3.49.1-1ubuntu1.4)
	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
	bionic	Released (80.0+build2-0ubuntu0.18.04.1)
	focal	Released (80.0+build2-0ubuntu0.20.04.1)
	xenial	Released (80.0+build2-0ubuntu0.16.04.1)

Severity score breakdown

Parameter	Value
Base score	4.7
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

References

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