Vulnerability in Python-Ecdsa Project
CVE-2019-14859
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.015 (74.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000
Affected products
- Python-Ecdsa Project
- Red Hat Python-Ecdsa — versions all python-ecdsa versions before 0.13.3
- Red Hat Ceph Storage — versions 2.0, 3.0
- Red Hat OpenStack — versions 10, 13, 14
- Red Hat Virtualization — versions 4.0
Weakness classification (CWE)
References
- github.com/warner/python-ecdsa/releases/tag/python-ecdsa-0.13.3 (Third Party Advisory, Release Notes)
- bugzilla.redhat.com/show_bug.cgi (Exploit, Patch, Third Party Advisory, Issue Tracking)
- pypi.org/project/ecdsa/0.13.3/ (Third Party Advisory, Release Notes)
- github.com/warner/python-ecdsa/issues/114 (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-14859?
- CVE-2019-14859 is a critical-severity vulnerability in Python-Ecdsa Project, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.1/10. Published 2020-01-02.
- How severe is CVE-2019-14859?
- Critical severity. CVSS v3 base score is 9.1 out of 10.