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CVE-2019-14859

Published: 14 October 2019

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.

Notes

AuthorNote
mdeslaur
included in CVE-2019-14853 commits

Priority

Medium

Cvss 3 Severity Score

9.1

Score breakdown

Status

Package Release Status
python-ecdsa
Launchpad, Ubuntu, Debian
bionic
Released (0.13-2ubuntu0.18.04.1)
disco
Released (0.13-3ubuntu0.1)
eoan
Released (0.13.2-2ubuntu0.1)
trusty Does not exist

upstream
Released (0.13.3-1)
xenial
Released (0.13-2ubuntu0.16.04.1)

Severity score breakdown

Parameter Value
Base score 9.1
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N