Improper Verification of Cryptographic Signature Affecting python26-ecdsa package, versions <0:0.11-3.4.amzn1


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
1.53% (73rd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-AMZN201803-PYTHON26ECDSA-5829856
  • published9 Aug 2023
  • disclosed2 Jan 2020

Introduced: 2 Jan 2020

CVE-2019-14859  (opens in a new tab)
CWE-347  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 python26-ecdsa to version 0:0.11-3.4.amzn1 or higher.
This issue was patched in ALAS-2023-1800.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python26-ecdsa package and not the python26-ecdsa package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

A flaw was found in all python-ecdsa versions before 0.13.3, where it did not correctly verify whether signatures used DER encoding. Without this verification, a malformed signature could be accepted, making the signature malleable. Without proper verification, an attacker could use a malleable signature to create false transactions.

CVSS Base Scores

version 3.1