Security readout for executives and security teams
Plain-English summary
An authenticated user of IBM Watson Knowledge Catalog on Cloud Pak for Data 4.0 can send a crafted request that may take the service down. Based on the supplied CVSS data, this is an availability risk, not a data theft issue.
Executive priority
Treat this as a moderate operational resilience issue. It does not indicate data exposure in the provided sources, but a successful attack could disrupt catalog availability for teams relying on WKC.
Technical view
CVE-2023-28955 is a CWE-20 input validation issue in IBM Watson Knowledge Catalog on Cloud Pak for Data 4.0. CVSS 3.1 is 6.5: network reachable, low complexity, low privileges, no user interaction, unchanged scope, and high availability impact.
Likely exposure
Exposure appears limited to deployments running IBM Watson Knowledge Catalog on Cloud Pak for Data 4.0. The attacker must already be authenticated, reducing broad internet risk but still creating insider or compromised-account availability exposure.
Exploitation context
The source bundle does not show CISA KEV listing or public active exploitation evidence. The described attack requires authentication and a crafted request, and the known impact is denial of service.
Researcher notes
The record identifies CWE-20 and availability-only impact, but the prompt does not include request details, fixed versions, or workaround specifics. Avoid assuming affected releases beyond Cloud Pak for Data 4.0.
Mitigation direction
- Check IBM advisory 7009747 for the vendor-supported fix or workaround.
- Prioritize remediation for production Cloud Pak for Data 4.0 WKC environments.
- Restrict WKC access to trusted authenticated users and administrative networks.
- Monitor service health and errors until vendor remediation is confirmed.
Validation and detection
- Inventory Cloud Pak for Data environments for Watson Knowledge Catalog version 4.0.
- Confirm whether affected WKC instances are reachable over network paths used by authenticated users.
- Review IBM X-Force ID 251704 and advisory 7009747 for remediation status.
- Check monitoring for unexplained WKC outages or availability degradation.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-20: Exact CWE lookup
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Open ATT&CK lookupCVE-2023-28955 mapping review
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Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/7009747CVE reference · vendor-advisory
- https://exchange.xforce.ibmcloud.com/vulnerabilities/251704CVE reference · vdb-entry
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.