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Security Bulletin: IBM DataPower Gateway vulnerable to Denial of Service.

Security Bulletin


Summary

The CVE may result in headers being modified in internal NodeJS traffic which could lead to a denial of service.

Vulnerability Details

CVEID:   CVE-2025-7339
DESCRIPTION:   on-headers is a node.js middleware for listening to when a response writes headers. A bug in on-headers versions `<1.1.0` may result in response headers being inadvertently modified when an array is passed to `response.writeHead()`. Users should upgrade to version 1.1.0 to receive a patch. Uses are strongly encouraged to upgrade to `1.1.0`, but this issue can be worked around by passing an object to `response.writeHead()` rather than an array.
CWE:   CWE-241: Improper Handling of Unexpected Data Type
CVSS Source:   openjs
CVSS Base score:   3.4
CVSS Vector:   (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM DataPower Gateway 10.6CD10.6.1.0 - 10.6.4.0
IBM DataPower Gateway 10.5.010.5.0.0 - 10.5.0.18
IBM DataPower Gateway 10.6.010.6.0.0 - 10.6.0.6

Remediation/Fixes

Affected productsFixed in versionFix instructions
IBM DataPower Gateway CD 10.6.1.0 - 10.6.4.010.6.5.0https://www.ibm.com/docs/en/datapower-gateway/10.6.x?topic=overview-release-notes#relnotes__install__title__1
IBM DataPower Gateway 10.5.0.0 - 10.5.0.1810.5.0.19https://www.ibm.com/docs/en/datapower-gateway/10.5.0?topic=overview-release-notes#relnotes__install__title__1
IBM DataPower Gateway 10.6.0.0 - 10.6.0.710.6.0.7https://www.ibm.com/docs/en/datapower-gateway/10.6.0?topic=overview-release-notes#relnotes__install__title__1

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

Change History

20 Oct 2025: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

Document Location

Worldwide

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Document Information

Modified date:
20 October 2025

Initial Publish date:
20 October 2025

UID

ibm17248499