The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows an adversary to cause a denial of service (delayed consensus decisions), and also increase the profits of individual validators, via short-range reorganizations of the underlying consensus chain.
The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows an adversary to leverage network delay to cause a denial of service (indefinite stalling of consensus decisions).
The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows an adversary to cause a denial of service (long-range consensus chain reorganizations), even when this adversary has little stake and cannot influence network message propagation. This can cause a protocol stall, or an increase in the profits of individual validators.
An issue was discovered in EthereumJ 1.8.2. There is Unsafe Deserialization in ois.readObject in mine/Ethash.java and decoder.readObject in crypto/ECKey.java. When a node syncs and mines a new block, arbitrary OS commands can be run on the server.
The mintToken function of a smart contract implementation for EthereumSmart, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.
The mintToken function of a smart contract implementation for EthereumLegit, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value.
The sell function of a smart contract implementation for EthereumLegit, an Ethereum token, has an integer overflow in which "amount sellPrice" can be zero, consequently reducing a seller's assets.
An exploitable information leak/denial of service vulnerability exists in the libevm (Ethereum Virtual Machine) create2 opcode handler of CPP-Ethereum. A specially crafted smart contract code can cause an out-of-bounds read leading to memory disclosure or denial of service. An attacker can create/send malicious a smart contract to trigger this vulnerability.