Vulnerability Details : 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 2020-07-09 15:15:11
Updated 2022-01-04 16:38:52
Source Mozilla Corporation
View at NVD,   CVE.org

Products affected by CVE-2020-12402

Exploit prediction scoring system (EPSS) score for CVE-2020-12402

EPSS FAQ
0.07%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 27 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-12402

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
1.2
 LOW AV:L/AC:H/Au:N/C:P/I:N/A:N
1.9
2.9
 NIST
4.4
 MEDIUM CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N
0.8
3.6
 NIST

CWE ids for CVE-2020-12402

  • The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-12402

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