CVE-2020-26264 MEDIUM

CVE-2020-26264: LES Server DoS via GetProofsV2

Vendor Ethereum
Product go-ethereum
Weakness CWE-400
Published December 11, 2020
Last update August 4, 2024
View on NVD All CVEs

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

Go Ethereum, or "Geth", is the official Golang implementation of the Ethereum protocol. In Geth before version 1.9.25 a denial-of-service vulnerability can make a LES server crash via malicious GetProofsV2 request from a connected LES client. This vulnerability only concerns users explicitly enabling les server; disabling les prevents the exploit. The vulnerability was patched in version 1.9.25.

Key dates

02Disclosure timeline

December 11, 2020 CVE published
August 4, 2024 Record updated