PT-2021-23678 · Ethereum · Ethereum Consensus Protocol

Published 2021-10-20 · Updated 2021-10-26 · CVE-2021-42765

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Ethereum consensus protocol versions prior to 2021-10-19

Description The Proof-of-Stake (PoS) Ethereum consensus protocol allows an adversary to leverage network delay to cause a denial of service, resulting in the indefinite stalling of consensus decisions.

Recommendations For versions prior to 2021-10-19, update the Ethereum consensus protocol to a version released after 2021-10-19 to prevent the denial of service attack. At the moment, there is no information about additional mitigation measures for this issue.

Fix

Related Identifiers

CVE-2021-42765

Affected Products

Ethereum Consensus Protocol

References · 4

• https://osv.dev/vulnerability/CVE-2021-42765 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-42765 · Security Note
• https://t.me/cibsecurity/30925 · Telegram Post
• https://arxiv.org/abs/2110.10086 · Note