CVE-2021-42766 : The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows a

The Proof-of-Stake (PoS) Ethereum consensus protocol through 2021-10-19 allows an adversary to cause a denial of service (long-range consensus chain reorganizations), even when this adversary has little stake and cannot influence network message propagation. This can cause a protocol stall, or an increase in the profits of individual validators.

Published 2021-10-20 20:15:08

Updated 2021-10-26 19:36:00

Source MITRE

View at NVD, CVE.org

Vulnerability category: Denial of service

Products affected by CVE-2021-42766

Proof-of-stake Ethereum Project » Proof-of-stake Ethereum
Versions up to, including, (<=) 2021-10-19
cpe:2.3:a:proof-of-stake_ethereum_project:proof-of-stake_ethereum:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-42766

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 43 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-42766

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.4	MEDIUM	AV:N/AC:L/Au:N/C:N/I:P/A:P	10.0	4.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: Partial Availability Impact: Partial
9.1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H	3.9	5.2	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: High Availability: High

References for CVE-2021-42766

https://arxiv.org/abs/2110.10086

[2110.10086] Three Attacks on Proof-of-Stake Ethereum
Third Party Advisory

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Vulnerability Details : CVE-2021-42766

Products affected by CVE-2021-42766

Exploit prediction scoring system (EPSS) score for CVE-2021-42766

CVSS scores for CVE-2021-42766

References for CVE-2021-42766