CVE-2018-20421
- 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
- 2018-12-24T03:29:00Z
- Modified
- 2026-10-20T10:50:06Z
- 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
-
IntroducedLast Affected
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:ethereum:go_ethereum:1.8.19:*:*:*:*:*:*:*", "range": [ { "introduced": "1.8.19" }, { "last_affected": "1.8.19" } ], "source": "CPE_STRING" } ] }