CVE-2023-38502Public exploitNetwork attack vector

Database crash via unvalidated nested UDF

Published Jul 25, 2023 · Updated Oct 10, 2024

Denial of service in TAOS Data TDengine 3.0.5.0 and earlier allows remote authenticated users to crash the database via a nested UDF query. The create-function path accepts arbitrary client-local file contents without validating that the payload is a valid UDF, and a nested SELECT invocation terminates taosd. Access requires a database connection and create-function privilege; exploitation interrupts the server process without reported data disclosure or modification.

CVSS severity6.5
Medium
EPSS probability0.68%
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 TAOS Data TDengine 3.0.5.0 and earlier allows remote authenticated users to crash the database via a nested UDF query. The create-function path accepts arbitrary client-local file contents without validating that the payload is a valid UDF, and a nested SELECT invocation terminates taosd. Access requires a database connection and create-function privilege; exploitation interrupts the server process without reported data disclosure or modification.

The record

CVE
CVE-2023-38502
Published
Jul 25, 2023
Updated
Oct 10, 2024
Vendor
TAOS Data
Product
TDengine
Classifications
CWE-20, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 10, 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=0 <3.0.7.1
  2. Affected versionversion=< 3.0.7.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

TAOS Data · TDengineversion=0 <3.0.7.1; version=< 3.0.7.1

Published CVSS scores

6.5GitHubCVSS:3.1/AV:N/AC:L/PR:L/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-20Improper Input Validation
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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