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.

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-1978-1 python-ecdsa security update
Debian DSA Debian DSA DSA-4588-1 python-ecdsa security update
EUVD EUVD EUVD-2020-0076 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.
Github GHSA Github GHSA GHSA-8qxj-f9rh-9fg2 Improper Verification of Cryptographic Signature in Pure-Python ECDSA
Ubuntu USN Ubuntu USN USN-4196-1 python-ecdsa vulnerabilities
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2024-08-05T00:26:39.127Z

Reserved: 2019-08-10T00:00:00.000Z

Link: CVE-2019-14859

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-01-02T15:15:11.960

Modified: 2024-11-21T04:27:30.923

Link: CVE-2019-14859

cve-icon Redhat

Severity : Moderate

Publid Date: 2019-09-25T00:00:00Z

Links: CVE-2019-14859 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses