CVE-2020-12402

3Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackepss 0.3%

exploitation probability

0.3%top 75% of all CVEs

observed exploitation

nono source reports it

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.

Affected products

Mozilla · Firefox

References

http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00016.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00027.html http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00049.html https://bugzilla.mozilla.org/show_bug.cgi?id=1631597 https://lists.debian.org/debian-lts-announce/2020/09/msg00029.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RFL6UNFK4MG2WDXLMLFAEIUSM5EUK7CG/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UWVDJRARXNWWWTCGMM63EXLQHH2LNOXO/https://security.gentoo.org/glsa/202007-10 https://usn.ubuntu.com/4417-1/https://usn.ubuntu.com/4417-2/https://www.debian.org/security/2020/dsa-4726