cve/2018/CVE-2018-20421.md

### [CVE-2018-20421](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-20421)
![](https://img.shields.io/static/v1?label=Product&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=n%2Fa&color=blue)
![](https://img.shields.io/static/v1?label=Vulnerability&message=n%2Fa&color=brighgreen)

### Description

Go Ethereum (aka geth) 1.8.19 allows attackers to cause a denial of service (memory consumption) by rewriting the length of a dynamic array in memory, and then writing data to a single memory location with a large index number, as demonstrated by use of "assembly { mstore }" followed by a "c[0xC800000] = 0xFF" assignment.

### POC

#### Reference
No PoCs from references.

#### Github
- https://github.com/demining/Solidity-Forcibly-Send-Ether-Vulnerability