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An wrong logical check identified in the transferFrom function of a smart contract implementation for RemiCoin (RMC), an Ethereum ERC20 token, allows the attacker to steal tokens or conduct resultant integer underflow attacks.
An wrong logical check identified in the transferFrom function of a smart contract implementation for RemiCoin (RMC), an Ethereum ERC20 token, allows the attacker to steal tokens or conduct resultant integer underflow attacks.
CVSS 3.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).
CVSS 2.0 Base Score 5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:P/A:N).
The following example subtracts from a 32 bit signed integer.
}return 0;The example has an integer underflow. The value of i is already at the lowest negative value possible, so after subtracting 1, the new value of i is 2147483647.
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