Information Exposure Affecting nss-softokn-freebl package, versions <0:3.53.1-6.46.amzn1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.07% (31st percentile)

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  • Snyk IDSNYK-AMZN201803-NSSSOFTOKNFREEBL-1726245
  • published27 Sept 2021
  • disclosed9 Jul 2020

Introduced: 9 Jul 2020

CVE-2020-12402  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 nss-softokn-freebl to version 0:3.53.1-6.46.amzn1 or higher.
This issue was patched in ALAS-2021-1522.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nss-softokn-freebl package and not the nss-softokn-freebl package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

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.

CVSS Scores

version 3.1