CVE-2023-30447: IBM Db2 denial of service

Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available

What, why and how

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 10.5, 11.1, and 11.5 is vulnerable to denial of service with a specially crafted query on certain tables. IBM X-Force ID: 253436.

What

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 10.5, 11.1, and 11.5 is vulnerable to denial of service with a specially crafted query on certain tables. IBM X-Force ID: 253436.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 10.5, 11.1, and 11.5 is vulnerable to denial of service with a specially crafted query on certain tables. IBM X-Force ID: 253436.

Why

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: a network path → Improper Input Validation → disrupt the affected service
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: High: exploitation depends on specific conditions
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-20 ↗
CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

NetworkUnauthenticatedDenial of serviceCWE-20

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2023-34865Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2023-1693IBM DB2: Mehrere Schwachstellen

Ein lokaler Angreifer kann mehrere Schwachstellen in IBM DB2 ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode auszuführen, Sicherheitsvorkehrungen zu umgehen, Informationen offenzulegen oder einen Denial of Service Zustand herbeizuführen.

Official advisory

CERT-FR · French · CERTFR-2024-AVI-0692Multiples vulnérabilités dans les produits IBM

d?id=CVE-2023-27867 Référence CVE CVE-2023-27868 https://www.cve.org/CVERecord?id=CVE-2023-27868 Référence CVE CVE-2023-27869 https://www.cve.org/CVERecord?id=CVE-2023-27869 Référence CVE CVE-2023-29256 https://www.cve.org/CVERecord?id=CVE-2023-29256 Référence CVE CVE-2023-30431 https://www.cve.org/CVERecord?id=CVE-2023-30431 Référence CVE CVE-2023-30442 https://www.cve.org/CVERecord?id=CVE-2023-30442 Référence CVE CVE-2023-30443 https://www.cve.org/CVERecord?id=CVE-2023-30443 Référence CVE CVE-2023-30445 https://www.cve.org/CVERecord?id=CVE-2023-30445 Référence CVE CVE-2023-30446 https://www.cve.org/CVERecord?id=CVE-2023-30446 Référence CVE CVE-2023-30447 https://www.cve.org/CVERecord?id=CVE-2023-30447 Référence CVE CVE-2023-30448 https://www.cve.org/CVERecord?id=CVE-2023-30448 Référence CVE CVE-2023-30449 https://www.cve.org/CVERecord?id=CVE-2023-30449 Référence CVE CVE-2023-31130 https://www.cve.org/CVERecord?id=CVE-2023-31130 Référence CVE CVE-2023-32067 https://www.cve.org/CVERecord?id=CVE-2023-32067 Référence CVE CVE-2023-35012 https://www.cve.org/CVERecord?id=CVE-2023-35012 Référence CVE CVE-2023-42282 https://www.cve.org/CVERecord?id=CVE-2023-42282 Référence CVE CVE-2023-45803 https://www.cve.org/CVERecord?id=CVE-2023-45803 Référence CVE CVE-2023-46809 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2023-AVI-0839Multiples vulnérabilités dans les produits IBM

ord?id=CVE-2023-29404 Référence CVE CVE-2023-29405 https://www.cve.org/CVERecord?id=CVE-2023-29405 Référence CVE CVE-2023-2976 https://www.cve.org/CVERecord?id=CVE-2023-2976 Référence CVE CVE-2023-30431 https://www.cve.org/CVERecord?id=CVE-2023-30431 Référence CVE CVE-2023-30441 https://www.cve.org/CVERecord?id=CVE-2023-30441 Référence CVE CVE-2023-30442 https://www.cve.org/CVERecord?id=CVE-2023-30442 Référence CVE CVE-2023-30443 https://www.cve.org/CVERecord?id=CVE-2023-30443 Référence CVE CVE-2023-30445 https://www.cve.org/CVERecord?id=CVE-2023-30445 Référence CVE CVE-2023-30446 https://www.cve.org/CVERecord?id=CVE-2023-30446 Référence CVE CVE-2023-30447 https://www.cve.org/CVERecord?id=CVE-2023-30447 Référence CVE CVE-2023-30448 https://www.cve.org/CVERecord?id=CVE-2023-30448 Référence CVE CVE-2023-30449 https://www.cve.org/CVERecord?id=CVE-2023-30449 Référence CVE CVE-2023-30991 https://www.cve.org/CVERecord?id=CVE-2023-30991 Référence CVE CVE-2023-30994 https://www.cve.org/CVERecord?id=CVE-2023-30994 Référence CVE CVE-2023-32067 https://www.cve.org/CVERecord?id=CVE-2023-32067 Référence CVE CVE-2023-32342 https://www.cve.org/CVERecord?id=CVE-2023-32342 Référence CVE CVE-2023-32697 https://www.cve.org/CVERecord?id=CVE-2023-32697 Référence CVE CVE-2023-33201 https://www.cve.org/CVERecord?id=

Official advisory

CERT-FR · French · CERTFR-2023-AVI-0541Multiples vulnérabilités dans les produits IBM

De multiples vulnérabilités ont été découvertes dans les produits IBM . Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, une atteinte à la confidentialité des données et une exécution de code arbitraire.

Official advisory

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: 10.5, 11.1, 11.5
Fixed: An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action: Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Evidence and provenance

Published 8 Jul 2023 · Last source change 13 Feb 2025, 16:49 UTC · CWE-20 · Improper Input Validation

CVE recordCVE.org · 5.1

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2023-34865

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceCNA

NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

2023-07-08CVE published

2025-02-13Fixed release or patch reference recorded

ENISA EUVD · EUVD-2023-34865↗CVE authority or vendor reference↗Vendor advisory↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

IBM Db2 denial of service

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2023-34865

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication

IBM Db2 denial of service

National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

EUVD-2023-34865

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.