What is CVE-2018-20421?

CVE-2018-20421 is a high-severity vulnerability in Ethereum Go_ethereum, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2018-12-24.

How severe is CVE-2018-20421?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2018-20421 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Ethereum Go_ethereum

CVE-2018-20421

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 demonstr…

EPSS: 0.015 (70.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Ethereum Go_ethereum — versions 1.8.19
N/a — versions n/a

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

demining/Solidity-Forcibly-Send-Ether-Vulnerability

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2018-20421?: CVE-2018-20421 is a high-severity vulnerability in Ethereum Go_ethereum, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2018-12-24.
How severe is CVE-2018-20421?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-20421 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.