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GOST 34.10/GOST 34.19 digital signature weakness
updated since 08.04.2002
Published: 29.04.2002
Source: A.V.KOMLIN
SecurityVulns ID: 1917
Type: library
Level: 6/10
Description: There is a weakness leading to ability to create "universal" signature without having a key. Also, it's possible to spoof content in case more than one key is allowed. It's also possible to deliberately create "weak" signature which will lead to private key compromise.

Original document A.V.KOMLIN, Серьёзная ошибка в новом госте ЭЦП! (29.04.2002)

A.V.KOMLIN, Новая ошибка в цифровой подписи (08.04.2002)

Files: О "двуличии" в алгоритмах цифровой подписи
Универсальная подпись, утверждённая ГОСТом.
Уязвимость методов цифровой подписи на базе алгоритма Эль-Гамаля: ГОСТ Р 34.10-94 и DSA (DSS). Часть 1.
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