CVE-2020-12402

Name	CVE-2020-12402
Description	During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which entailed significantly input-dependent flow. This allowed an attacker able to perform electromagnetic-based side channel attacks to record traces leading to the recovery of the secret primes. Note: An unmodified Firefox browser does not generate RSA keys in normal operation and is not affected, but products built on top of it might. This vulnerability affects Firefox < 78.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2266-1, DLA-2388-1, DSA-4726-1
Debian Bugs	963152

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nss (PTS)	jessie, jessie (lts)	2:3.26-1+debu8u18	fixed
	stretch (security)	2:3.26.2-1.1+deb9u5	fixed
	stretch (lts), stretch	2:3.26.2-1.1+deb9u7	fixed
	buster	2:3.42.1-1+deb10u5	fixed
	buster (security)	2:3.42.1-1+deb10u8	fixed
	bullseye (security), bullseye	2:3.61-1+deb11u3	fixed
	bookworm	2:3.87.1-1	fixed
	sid, trixie	2:3.99-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Origin	Debian Bugs
nss	source	jessie	2:3.26-1+debu8u11	DLA-2266-1
nss	source	stretch	2:3.26.2-1.1+deb9u2	DLA-2388-1
nss	source	buster	2:3.42.1-1+deb10u3	DSA-4726-1
nss	source	(unstable)	2:3.53.1-1		963152

https://hg.mozilla.org/projects/nss/rev/699541a7793bbe9b20f1d73dc49e25c6054aa4c1
Fixed upstream in 3.53.1