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CVE Record

CVE-2019-4049: IBM MQ 9.1.0.0, 9.1.0.1, 9.1.1, and 9.1.0.2 is vulnerable to a denial of service due to a local user being...

IBM MQ 9.1.0.0, 9.1.0.1, 9.1.1, and 9.1.0.2 is vulnerable to a denial of service due to a local user being able to fill up the disk space of the underlying filesystem using the error logging service. IBM X-Force ID: 156398.

MediumCVSS 6.2Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2019-4049 is a local denial-of-service issue in IBM MQ. A local user can cause the error logging service to consume disk space, potentially disrupting MQ availability if the underlying filesystem fills.

Executive priority

Treat as a targeted availability risk, especially for business-critical MQ systems. It warrants scheduled remediation and monitoring, with faster action where many local users or shared filesystems increase disruption risk.

Technical view

IBM MQ 9.1.0.0, 9.1.0.1, 9.1.1, and 9.1.0.2 are affected. The reported impact is high availability loss through filesystem exhaustion via error logging. The CVSS 3.0 score is 6.2, with local attack vector and no confidentiality or integrity impact.

Likely exposure

Exposure is most likely on IBM MQ hosts running the listed 9.1 versions where local users or application accounts can interact with MQ and where log growth can affect service filesystems.

Exploitation context

The source bundle does not show CISA KEV listing or active exploitation evidence. Public sources describe a local denial-of-service condition, not remote code execution or data theft.

Researcher notes

Evidence is limited to the CVE description, IBM advisory reference, and IBM X-Force entry. The vulnerability is availability-only in the supplied CVSS vector. Do not assume remote exploitability, privilege escalation, or data exposure from these sources.

Mitigation direction

  • Check IBM support guidance for the official fix or upgrade path.
  • Prioritize affected MQ hosts with shared or capacity-constrained filesystems.
  • Reduce unnecessary local account access on MQ servers.
  • Monitor MQ error log and filesystem usage for abnormal growth.
  • Ensure disk alerts trigger before service-impacting exhaustion.

Validation and detection

  • Inventory IBM MQ versions across production and non-production hosts.
  • Confirm whether versions 9.1.0.0, 9.1.0.1, 9.1.1, or 9.1.0.2 are present.
  • Review IBM advisory status for each affected host.
  • Check filesystem layout and alerting around MQ error logging paths.
  • Look for recent abnormal disk growth on MQ servers.
Prepared
Confidence
high
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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

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CVE-2019-4049 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
6.2 (3.0)
Known Exploited
No
Published

Vector: CVSS:3.0/PR:N/I:N/UI:N/AV:L/S:U/AC:L/A:H/C:N/E:U/RC:C/RL:O

Official CVE source material

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.

1CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS vector scores

1 official score

We 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.

ScoreVersionSeverityVectorExploitImpactSource
6.2CVSS 3.0MediumCVSS:3.0/PR:N/I:N/UI:N/AV:L/S:U/AC:L/A:H/C:N/E:U/RC:C/RL:O2.53.6Primary CVE score

Vulnerability scoring details

Base CVSS 3.0 score

6.2Medium
CVSS 3.0 vector shape for CVE-2019-4049Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.0/PR:N/I:N/UI:N/AV:L/S:U/AC:L/A:H/C:N/E:U/RC:C/RL:O

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
IBMMQ9.1.0.0, 9.1.0.1, 9.1.1, 9.1.0.2Listed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.