CVE-2024-6873Network attack vector

Server crash via untrusted Field type deserialization

Published Aug 1, 2024 · Updated Aug 2, 2024

Heap-based buffer overflow in ClickHouse allows remote attackers to crash the server through an unauthenticated native-interface request. getBinaryValue creates a Field from an attacker-controlled type value, and affected builds fail to reject invalid types during binary deserialization. Unauthenticated network access to the native interface is sufficient; execution-flow redirection is limited to a 256-byte memory range, with no demonstrated code execution.

CVSS severity8.1
High
EPSS probability0.72%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in ClickHouse allows remote attackers to crash the server through an unauthenticated native-interface request. getBinaryValue creates a Field from an attacker-controlled type value, and affected builds fail to reject invalid types during binary deserialization. Unauthenticated network access to the native interface is sufficient; execution-flow redirection is limited to a 256-byte memory range, with no demonstrated code execution.

The record

CVE
CVE-2024-6873
Published
Aug 1, 2024
Updated
Aug 2, 2024
Vendor
ClickHouse
Product
ClickHouse
Classifications
CWE-122, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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=v23.8.0 <v23.8.15.35-lts
  2. Affected versionversion=v24.3.0 <v24.3.4.147-lts
  3. Affected versionversion=v24.4.0 <v24.4.2.141-stable
  4. Affected versionversion=v24.5.0 <v24.5.1.1763
  5. Affected versionversion=v24.6.0 <v24.6.1.4423-stable

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ClickHouse · ClickHouseversion=v23.8.0 <v23.8.15.35-lts; version=v24.3.0 <v24.3.4.147-lts; version=v24.4.0 <v24.4.2.141-stable; version=v24.5.0 <v24.5.1.1763; version=v24.6.0 <v24.6.1.4423-stable

Published CVSS scores

8.1ClickHouseCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/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.

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

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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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