Smart Contract / Insufficient Gas Griefing

Description

Insufficient Gas Griefing (CWE-843) is a type of vulnerability found in the Smart Contract code of a Software Composition Analysis (SCA) system. It is a type of security issue that can arise when a contract does not have enough gas to execute a set of instructions, leading to a denial of service attack. This type of attack can be used to disrupt the normal functioning of a contract and can also be used as a way to gain access to private data. It is important to note that this is an attack that can be prevented by properly setting the gas limit of a contract, as well as setting the gas price correctly.

Risk

The risk of Insufficient Gas Griefing is that it can lead to a denial of service attack, and can have a significant impact on the functioning of the Smart Contract and the data stored within it. Additionally, it can also be used to gain access to private data. The risk of this vulnerability is significant and should be taken into consideration when designing a Smart Contract.

Solution

The solution to Insufficient Gas Griefing is to ensure that the gas limit for the contract is set correctly. This should be done by setting the gas limit to a value that is greater than the amount of gas required to execute the contract. Additionally, the gas price should also be set correctly, as an incorrect gas price can also lead to an insufficient gas attack.

Example

The following code snippet is an example of a contract that is vulnerable to Insufficient Gas Griefing attack:

contract MyContract {
   function myFunction() public {
      // code here
   }
}

In this contract, the gas limit is not set to a value that is greater than the amount of gas required to execute the contract, meaning that an attacker could execute the contract and cause a denial of service attack.