CVE-2020-12402
4.4
MEDIUM
CVSS 3.1
EPSS 0.10%
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.
How to fix CVE-2020-12402
To remediate CVE-2020-12402, upgrade the affected package to a fixed version below.
- —upgrade to 3.53.1-r0 or later
- —upgrade to 2:3.53.1-1 or later
Is CVE-2020-12402 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 3.53.1-r0
- from 0, < 2:3.53.1-1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM4.4 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N |