CVE-2020-35216Network attack vector

Denial of service via false member-down events

Published Dec 16, 2021 · Updated Aug 4, 2024

Denial of service in Atomix 3.1.5 and earlier allows remote attackers to exhaust cluster resources via false member-down messages. The SWIM membership thread trusts atomix-membership-sync events claiming live peers are down, removes them, and repeatedly reconciles their renewed alive state. A malicious Atomix node can trigger endless member-state flapping, consume resources, disconnect Raft peers, and interrupt cluster service.

CVSS severity5.9
Medium
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Atomix 3.1.5 and earlier allows remote attackers to exhaust cluster resources via false member-down messages. The SWIM membership thread trusts atomix-membership-sync events claiming live peers are down, removes them, and repeatedly reconciles their renewed alive state. A malicious Atomix node can trigger endless member-state flapping, consume resources, disconnect Raft peers, and interrupt cluster service.

The record

CVE
CVE-2020-35216
Published
Dec 16, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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