CVE-2020-26264 LES Server DoS via GetProofsV2

2020-12-1116:45:24

CWE-400

GitHub_M

www.cve.org

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

0.002 Low

EPSS

Percentile

53.3%

JSON

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.

CNA Affected

[
  {
    "product": "go-ethereum",
    "vendor": "ethereum",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.9.25"
      }
    ]
  }
]