CVE-2021-29702Network attack vector

Unauthenticated database crash via crafted SELECT statement

Published Jun 16, 2021 · Updated Sep 16, 2024

Denial of service in IBM Db2 11.1.4 and 11.5.5 allows remote attackers to terminate the database server via a crafted SELECT statement. IBM has not disclosed the parser or optimizer locus or why statement processing triggers abnormal termination. No authentication or user interaction is required, and the reported consequence is an availability-only server crash.

CVSS severity7.5
High
EPSS probability1.88%
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 IBM Db2 11.1.4 and 11.5.5 allows remote attackers to terminate the database server via a crafted SELECT statement. IBM has not disclosed the parser or optimizer locus or why statement processing triggers abnormal termination. No authentication or user interaction is required, and the reported consequence is an availability-only server crash.

The record

CVE
CVE-2021-29702
Published
Jun 16, 2021
Updated
Sep 16, 2024
Vendor
IBM
Product
IBM Db2 for Linux, UNIX, and Windows
Classifications
T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 16, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=11.1.4
  2. Affected versionversion=11.5.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

IBM · IBM Db2 for Linux, UNIX, and Windowsversion=11.1.4; version=11.5.5

Published CVSS scores

7.5IBMCVSS:3.0/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 exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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