CVE-2019-14859
Improper Verification of Cryptographic Signature in Pure-Python ECDSA
9.1
CRITICAL
CVSS 3.1
EPSS 0.07%
Description
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.
How to fix CVE-2019-14859
To remediate CVE-2019-14859, upgrade the affected package to a fixed version below.
- —upgrade to 0.13.3-1 or later
- —upgrade to 0.13.3 or later
- —upgrade to 0.13.3 or later
Is CVE-2019-14859 being exploited?
Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 0.13.3-1
- from 0, < 0.13.3
- from 0, < 0.13.3
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |