Описание
Possible timing attack in derivation_endpoint
Impact
When using the derivation_endpoint plugin, it's possible for the attacker to use a timing attack to guess the signature of the derivation URL.
Patches
The problem has been fixed by comparing sent and calculated signature in constant time, using Rack::Utils.secure_compare. Users using the derivation_endpoint plugin are urged to upgrade to Shrine 3.3.0 or greater.
Workarounds
Users of older Shrine versions can apply the following monkey-patch after loading the derivation_endpoint plugin:
References
You can read more about timing attacks here.
Пакеты
shrine
< 3.3.0
3.3.0
Связанные уязвимости
In Shrine before version 3.3.0, when using the `derivation_endpoint` plugin, it's possible for the attacker to use a timing attack to guess the signature of the derivation URL. The problem has been fixed by comparing sent and calculated signature in constant time, using `Rack::Utils.secure_compare`. Users using the `derivation_endpoint` plugin are urged to upgrade to Shrine 3.3.0 or greater. A possible workaround is provided in the linked advisory.