CVE-2024-41436Public exploitNetwork attack vector

Server crash via invalid query-tree cast

Published Sep 3, 2024 · Updated Sep 3, 2024

Buffer overflow in ClickHouse 24.3.3.102 allows remote attackers to crash the server through a crafted distributed-table insertion. During constant-expression evaluation, DB::evaluateConstantExpressionImpl treats an incompatible query-tree node as a QueryNode and reads a null address. Reachability requires the MySQL interface, a Distributed-table cluster, and distributed_product_mode='allow'; published evidence reports only a server crash.

CVSS severity7.5
High
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in ClickHouse 24.3.3.102 allows remote attackers to crash the server through a crafted distributed-table insertion. During constant-expression evaluation, DB::evaluateConstantExpressionImpl treats an incompatible query-tree node as a QueryNode and reads a null address. Reachability requires the MySQL interface, a Distributed-table cluster, and distributed_product_mode='allow'; published evidence reports only a server crash.

The record

CVE
CVE-2024-41436
Published
Sep 3, 2024
Updated
Sep 3, 2024
Vendor
ClickHouse
Product
ClickHouse
Classifications
CWE-120, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=24.3.3.102

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClickHouse · ClickHouseversion=24.3.3.102

Published CVSS scores

7.5CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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