Use of a Broken or Risky Cryptographic Algorithm Affecting nettle-debuginfo package, versions <0:2.7.1-9.amzn2


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
1.74% (78th percentile)

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  • Snyk IDSNYK-AMZN2-NETTLEDEBUGINFO-1698173
  • published27 Sept 2021
  • disclosed5 Apr 2021

Introduced: 5 Apr 2021

CVE-2021-20305  (opens in a new tab)
CWE-327  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 nettle-debuginfo to version 0:2.7.1-9.amzn2 or higher.
This issue was patched in ALAS2-2021-1629.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nettle-debuginfo package and not the nettle-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS Base Scores

version 3.1