Security readout for executives and security teams
Plain-English summary
CVE-2018-1684 is an IBM MQ denial-of-service issue tied to MQTT topic string publishing. It does not indicate data theft or data modification, but it can disrupt messaging availability. Business urgency depends on whether affected IBM MQ versions support critical workflows and whether MQTT publishing is reachable by users or systems.
Executive priority
Prioritize as moderate. Accelerate remediation for internet-reachable, partner-facing, or business-critical MQ services because availability loss can interrupt dependent applications.
Technical view
IBM MQ versions 8.0 through 9.1 are affected by an MQTT topic string publishing error that can cause denial of service. The CVSS 3.0 score is 5.3 with network attack vector, low privileges required, high attack complexity, no user interaction, and availability impact only.
Likely exposure
Exposure is most likely where IBM MQ or WebSphere MQ 8.0 through 9.1 runs with MQTT publishing enabled and reachable by authenticated clients.
Exploitation context
The source bundle does not show CISA KEV listing or active exploitation. The CVSS exploit maturity value is unproven, so treat exploitation evidence as incomplete rather than confirmed.
Researcher notes
No CWE is provided in the bundle. The key research focus is confirming affected IBM MQ versions, MQTT exposure, privilege boundaries, and whether IBM’s official fix has been applied. Do not assume broader IBM products are affected.
Mitigation direction
- Review IBM advisory 10734297 for affected and fixed levels.
- Upgrade or patch affected IBM MQ deployments per IBM guidance.
- Restrict MQTT publishing access to trusted authenticated clients.
- Limit network reachability to MQ and MQTT listener services.
- Monitor MQ availability and MQTT publishing errors for disruption indicators.
Validation and detection
- Inventory IBM MQ and WebSphere MQ versions across environments.
- Identify queue managers with MQTT capability enabled.
- Confirm whether deployed versions match the listed affected releases.
- Verify IBM-recommended fixes are installed after maintenance.
- Review MQ logs for denial-of-service symptoms around MQTT publishing.
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
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2018-1684 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/A:H/AC:H/AV:N/C:N/I:N/PR:L/S:U/UI:N/E:U/RC:C/RL:O
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:3.0/A:H/AC:H/AV:N/C:N/I:N/PR:L/S:U/UI:N/E:U/RC:C/RL:O1.63.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
5.3MediumVector: CVSS:3.0/A:H/AC:H/AV:N/C:N/I:N/PR:L/S:U/UI:N/E:U/RC:C/RL:O
Source materials
- CVE List V5 sourceCVE List V5
- ibm-websphere-cve20181684-dos(145456)CVE reference · vdb-entry, x_refsource_XF
- https://www.ibm.com/support/docview.wss?uid=ibm10734297CVE reference · x_refsource_CONFIRM
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.