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CVE-2019-14859

python-ecdsa: DER encoding is not being verified in signatures

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 3.1 · 9.1 Critical EPSS 1.5% KEV · Not listed
Vendors
Python-ecdsa Project Redhat
Products
Python-ecdsa Ceph Storage Openstack and 3 more
CVE-2019-14853

python-ecdsa: Unexpected and undocumented exceptions during signature decoding

An error-handling flaw was found in python-ecdsa before version 0.13.3. During signature decoding, malformed DER signatures could raise unexpected exceptions (or no exceptions at all), which could lead to a denial of service.

CVSS 3.1 · 7.5 High EPSS 2.4% KEV · Not listed
Vendors
Python-ecdsa Project Redhat
Products
Python-ecdsa Satellite Satellite Capsule