CVE-2018-20421

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Source
https://cve.org/CVERecord?id=CVE-2018-20421
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20421.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-20421
Published
2018-12-24T03:29:00.353Z
Modified
2026-07-08T16:40:22.788670Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

Git / github.com/ethereum/go-ethereum

Affected ranges

Type
GIT
Repo
https://github.com/ethereum/go-ethereum
Events
Introduced
dae82f098570e15d44584f0d7f350713f4774727
Last affected
dae82f098570e15d44584f0d7f350713f4774727
Database specific 
{
    "cpe": "cpe:2.3:a:ethereum:go_ethereum:1.8.19:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "1.8.19"
        },
        {
            "last_affected": "1.8.19"
        }
    ],
    "source": "CPE_STRING"
}

Affected versions

1.*
1.8.19
v1.*
v1.8.19

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20421.json"