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Cryptographic Issues Affecting ecdsa package, versions [,0.13.3)

0.0
medium

Snyk CVSS

    Attack Complexity Low
    Privileges Required High
    Integrity High

    Threat Intelligence

    EPSS 0.24% (62nd percentile)
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NVD
9.1 critical
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SUSE
6.8 medium
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Red Hat
7.4 high

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  • Snyk ID SNYK-PYTHON-ECDSA-540493
  • published 2 Jan 2020
  • disclosed 2 Jan 2020
  • credit Unknown
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Introduced: 2 Jan 2020

CVE-2019-14859 Open this link in a new tab
CWE-310 Open this link in a new tab

How to fix?

Upgrade ecdsa to version 0.13.3 or higher.

Overview

ecdsa is an easy-to-use implementation of ECDSA cryptography (Elliptic Curve Digital Signature Algorithm), implemented purely in Python, released under the MIT license.

Affected versions of this package are vulnerable to Cryptographic Issues. A flaw exists where signatures used by DER encoding are not correctly verified. 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.