Security readout for executives and security teams
Plain-English summary
CVE-2019-4655 is an IBM MQ denial-of-service issue. An authenticated user could trigger client connection resets because of an error in the Data Conversion routine. The business impact is service disruption, not data theft or code execution based on the provided sources.
Executive priority
Moderate priority. Remediate through the normal patch process, with faster handling where IBM MQ supports critical workflows or accepts connections from broad user or partner populations.
Technical view
IBM MQ 9.1.0.0 through 9.1.0.3 and 9.1.1 through 9.1.3 are affected. CVSS 3.0 score is 4.3: network reachable, low complexity, low privileges required, no user interaction, and no confidentiality or integrity impact.
Likely exposure
Exposure is limited to organizations running the listed IBM MQ 9.1 versions where authenticated users or applications can reach MQ services. Risk is higher for shared, partner-facing, or business-critical queue managers.
Exploitation context
The bundle does not show CISA KEV listing or active exploitation. The described attacker already needs authentication and can reset client connections; no exploit method or public weaponization evidence is provided.
Researcher notes
The source bundle provides affected versions, CVSS vector, and vulnerability class, but not detailed root-cause mechanics or remediation version names. Treat vendor advisory details as authoritative for exact fixes.
Mitigation direction
- Review IBM’s advisory and apply the vendor-recommended fix or supported upgrade path.
- Prioritize externally reachable and business-critical IBM MQ queue managers.
- Limit authenticated MQ access to trusted users, applications, and networks.
- Monitor for abnormal client connection resets until remediation is complete.
Validation and detection
- Inventory IBM MQ deployments and record exact 9.1 version levels.
- Confirm whether any systems run 9.1.0.0 through 9.1.3 listed as affected.
- Verify IBM advisory remediation has been applied on affected systems.
- Review MQ logs for unusual client connection reset patterns.
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-2019-4655 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
- 4.3 (3.0)
- Known Exploited
- No
- Published
Vector: CVSS:3.0/C:N/A:L/S:U/I:N/PR:L/AV:N/AC:L/UI:N/RC:C/E:U/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/C:N/A:L/S:U/I:N/PR:L/AV:N/AC:L/UI:N/RC:C/E:U/RL:O2.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.0 score
4.3MediumVector: CVSS:3.0/C:N/A:L/S:U/I:N/PR:L/AV:N/AC:L/UI:N/RC:C/E:U/RL:O
Source materials
- CVE List V5 sourceCVE List V5
- https://www.ibm.com/support/pages/node/1106529CVE reference · x_refsource_CONFIRM
- ibm-mq-cve20194655-dos (170966)CVE reference · vdb-entry, x_refsource_XF
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.