IBM Support

Security Bulletin: IBM InfoSphere Information Server is affected by multiple vulnerabilities in Apache ZooKeeper

Security Bulletin


Summary

Multiple vulnerabilities in Apache ZooKeeper that is used by InfoSphere Information Server were addressed.

Vulnerability Details

CVEID:   CVE-2026-24281
DESCRIPTION:   Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name. It's important to note that attacker must present a certificate which is trusted by ZKTrustManager which makes the attack vector harder to exploit. Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.
CWE:   CWE-295: Improper Certificate Validation
CVSS Source:   NVD
CVSS Base score:   7.4
CVSS Vector:   (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID:   CVE-2026-24308
DESCRIPTION:   Improper handling of configuration values in ZKConfig in Apache ZooKeeper 3.8.5 and 3.9.4 on all platforms allows an attacker to expose sensitive information stored in client configuration in the client's logfile. Configuration values are exposed at INFO level logging rendering potential production systems affected by the issue. Users are recommended to upgrade to version 3.8.6 or 3.9.5 which fixes this issue.
CWE:   CWE-532: Insertion of Sensitive Information into Log File
CVSS Source:   NVD
CVSS Base score:   7.5
CVSS Vector:   (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
InfoSphere Information Server11.7.0.0 to 11.7.1.6

Remediation/Fixes

IBM InfoSphere Information Server11.7.0.0 to 11.7.1.6DT465048--Apply IBM InfoSphere Information Server version 11.7.1.0 
--Apply IBM InfoSphere Information Server version 11.7.1.6
--Apply IBM InfoSphere Information Server 11.7.1.6 Service pack 3


Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

Change History

24 Jun 2026: 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

[{"Business Unit":{"code":"BU048","label":"IBM Software"},"Product":{"code":"SSZJPZ","label":"IBM InfoSphere Information Server"},"Component":"","Platform":[{"code":"PF033","label":"Windows"},{"code":"PF002","label":"AIX"},{"code":"PF016","label":"Linux"}],"Version":"11.7","Edition":"","Line of Business":{"code":"LOB76","label":"Data Platform"}}]

Document Information

Modified date:
24 June 2026

Initial Publish date:
24 June 2026

UID

ibm17275266