Vulnerability Database

309,084

Total vulnerabilities in the database

CVE-2020-12402

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.

  • Published: Jul 9, 2020
  • Updated: Nov 16, 2025
  • CVE: CVE-2020-12402
  • Severity: Low
  • Exploit:

CVSS v3:

  • Severity: Low
  • Score: 4.4
  • AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N

CVSS v2:

  • Severity: Low
  • Score: 1.2
  • AV:L/AC:H/Au:N/C:P/I:N/A:N

CWEs:

Software From Fixed in
mozilla / firefox - 78.0
opensuse / leap 15.1 15.1.x
fedoraproject / fedora 32 32.x
opensuse / leap 15.2 15.2.x
debian / debian_linux 9.0 9.0.x