Published: 02/01/2020 Updated: 04/08/2021

CVSS v2 Base Score: 6.4 | Impact Score: 4.9 | Exploitability Score: 10

CVSS v3 Base Score: 9.1 | Impact Score: 5.2 | Exploitability Score: 3.9

VMScore: 570

Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N

A flaw was found in all python-ecdsa versions prior to 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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Several security issues were fixed in python-ecdsa ...

It was discovered that python-ecdsa, a cryptographic signature library for Python, incorrectly handled certain signatures A remote attacker could use this issue to cause python-ecdsa to either not warn about incorrect signatures, or generate exceptions resulting in a denial-of-service For the oldstable distribution (stretch), these problems have ...

An error-handling flaw was found in python-ecdsa before version 0133 During signature decoding, malformed DER signatures could raise unexpected exceptions (or no exceptions at all), which could lead to a denial of service (CVE-2019-14853) A flaw was found in all python-ecdsa versions before 0133, where it did not correctly verify whether sign ...

CWE-347 https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14859 https://github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3 https://github.com/warner/python-ecdsa/issues/114 https://pypi.org/project/ecdsa/0.13.3/https://usn.ubuntu.com/4196-1/https://nvd.nist.gov

CVE-2019-14859

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