Podatność CVE-2020-11093


Publikacja: 2020-12-24

Opis:
Hyperledger Indy Node is the server portion of a distributed ledger purpose-built for decentralized identity. In Hyperledger Indy before version 1.12.4, there is lack of signature verification on a specific transaction which enables an attacker to make certain unauthorized alterations to the ledger. Updating a DID with a nym transaction will be written to the ledger if neither ROLE or VERKEY are being changed, regardless of sender. A malicious DID with no particular role can ask an update for another DID (but cannot modify its verkey or role). This is bad because 1) Any DID can write a nym transaction to the ledger (i.e., any DID can spam the ledger with nym transactions), 2) Any DID can change any other DID's alias, 3) The update transaction modifies the ledger metadata associated with a DID.

Typ:

CWE-347

(Improper Verification of Cryptographic Signature)

CVSS2 => (AV:N/AC:L/Au:N/C:N/I:P/A:N)

Ogólna skala CVSS
Znaczenie
Łatwość wykorzystania
5/10
2.9/10
10/10
Wymagany dostęp
Złożoność ataku
Autoryzacja
Zdalny
Niska
Nie wymagana
Wpływ na poufność
Wpływ na integralność
Wpływ na dostępność
Brak
Częściowy
Brak
Affected software
Linuxfoundation -> Indy-node 

 Referencje:
https://github.com/hyperledger/indy-node/blob/master/CHANGELOG.md#1124
https://github.com/hyperledger/indy-node/blob/master/docs/source/auth_rules.md
https://github.com/hyperledger/indy-node/commit/55056f22c83b7c3520488b615e1577e0f895d75a
https://github.com/hyperledger/indy-node/security/advisories/GHSA-wh2w-39f4-rpv2

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