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.
Platform | Package | Release Date | Advisory |
---|---|---|---|
Amazon Linux 1 | python-ecdsa | 2023-08-03 20:16 | ALAS-2023-1800 |
Score Type | Score | Vector | |
---|---|---|---|
Amazon Linux | CVSSv3 | 7.4 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
NVD | CVSSv2 | 6.4 | AV:N/AC:L/Au:N/C:P/I:P/A:N |
NVD | CVSSv3 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |