CVE-2019-14859

Aliases:GHSA-8qxj-f9rh-9fg2PYSEC-2020-163
Advisory lineage Upstream: 0 Downstream: 14
Modified
Published: 02 Jan 2020, 14:15
Last modified:05 Aug 2024, 00:26

Vulnerability Summary

Overall Risk (default)
high
70/100
CVSS Score
9.1 CRITICAL
v3.1 (nvd)
EPSS Score
0.07% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

02 Jan 2020, 14:15
Published
Vulnerability first disclosed
05 Aug 2024, 00:26
Last Modified
Vulnerability information updated

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.

CVSS Metrics

  • v4.0•CRITICAL•Score: 9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
  • v3.1•CRITICAL•Score: 9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
  • v3.0•HIGH•Score: 7.4CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
  • v2.0•MEDIUM•Score: 6.4AV:N/AC:L/Au:N/C:P/I:P/A:N

EPSS Trends

Current EPSS score: 0.07%• Percentile: 22%

Techniques & Countermeasures

  • CWE-347•Improper Verification of Cryptographic Signature

    The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Affected Systems

  • PyPI•ecdsa

    < 0.13.3

  • python-ecdsa_project•python-ecdsa

    < 0.13.3

  • red hat•python-ecdsa

    all python-ecdsa versions before 0.13.3

  • redhat•ceph_storage

    2.0 | 3.0

  • redhat•openstack

    10 | 13 | 14 | 15

  • redhat•virtualization

    4.0

References (13)