PYSEC-2020-163

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...

PYSEC-2020-182

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...

UBUNTU-CVE-2016-1000342

In the Bouncy Castle JCE Provider version 1.55 and earlier ECDSA does not fully validate ASN.1 encoding of signature on verification. It is possible to inject extra elements in the sequence making up the signature and still have it validate, which in some cases may allow the introduction of...

Подмена подписанного документа в ECDSA

Серьёзная ошибка в ECDSA. В матаппарате новейшего американского стандарта ЭЦП известного как ECDSA DSA для эллиптических кривых 1 cтр. 25-30 существует серьёзная ошибка позволяющая выбрать такое значение секретного ключа, чтобы получить одинаковые подписи для разных документов. Это позволяет...