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
Author | Note |
---|---|
mdeslaur | included in CVE-2019-14853 commits |
Priority
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 |