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CVE-2020-12402 During RSA key generation, bignum implementations used a variation of the Binary Extended Euclidean Algorithm which…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 78 | earliest → < 78 | 78 |
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