Denial of Service Vulnerability in Go Ethereum (geth) 1.8.19 via Memory Consumption

CVE-2018-20421 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:N/A:P

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.

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