DescriptionDuring 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2266-1, DSA-4726-1
NVD severitylow
Debian Bugs963152

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
nss (PTS)stretch (security), stretch2:3.26.2-1.1+deb9u1vulnerable
buster, buster (security)2:3.42.1-1+deb10u3fixed
bullseye, sid2:3.55-1fixed

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs

Fixed upstream in 3.53.1

Search for package or bug name: Reporting problems