Security Bulletin
Summary
IBM Storage Defender Copy Data Management can be affected by vulnerabilities in Zlib which use by MongoDB server. Vulnerability include mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client as described by the CVEs in the "Vulnerability Details" section.
Vulnerability Details
CVEID: CVE-2025-14847
DESCRIPTION: Mismatched length fields in Zlib compressed protocol headers may allow a read of uninitialized heap memory by an unauthenticated client. This issue affects all MongoDB Server v7.0 prior to 7.0.28 versions, MongoDB Server v8.0 versions prior to 8.0.17, MongoDB Server v8.2 versions prior to 8.2.3, MongoDB Server v6.0 versions prior to 6.0.27, MongoDB Server v5.0 versions prior to 5.0.32, MongoDB Server v4.4 versions prior to 4.4.30, MongoDB Server v4.2 versions greater than or equal to 4.2.0, MongoDB Server v4.0 versions greater than or equal to 4.0.0, and MongoDB Server v3.6 versions greater than or equal to 3.6.0.
CWE: CWE-130: Improper Handling of Length Parameter Inconsistency
CVSS Source: cna@mongodb.com
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) |
| IBM Storage Defender Copy Data Management | 2.2.0.0 - 2.2.28.0 |
Remediation/Fixes
None
Workarounds and Mitigations
Security Advisory: Disabling zlib Compression in MongoDB Server
Overview
As part of our proactive security hardening measures, zlib compression has been disabled on the MongoDB server configuration through this security patch.
What is zlib Compression?
zlib is a data compression algorithm used by MongoDB to reduce the size of data transmitted between clients and the database server. While compression improves bandwidth efficiency, certain compression mechanisms can introduce security risks under specific attack scenarios.
Why Are We Disabling It?
Recent security research has identified that compression mechanisms such as zlib may increase exposure to certain attack vectors, including:
- Compression-based side-channel attacks
- Potential information leakage during encrypted communications
- Increased attack surface in high-security environments
Disabling zlib compression reduces this risk by eliminating the compression layer in database communication.
Security Benefit
By disabling zlib compression:
- The attack surface is reduced
- Risk of compression-related vulnerabilities is mitigated
- Secure configuration posture is strengthened
- Compliance with hardened security baselines is improved
Customer Impact
- No impact to data integrity or database functionality
- Slight increase in network bandwidth usage may be observed
- No application code changes are required
Recommended Action
No action is required from customers unless custom MongoDB configurations explicitly enforce zlib compression.
Customers managing their own MongoDB instances should review and align their configuration to disable zlib compression where applicable.
Customers can follow the instruction in CDM support page https://www.ibm.com/support/pages/node/7253217 to obtain the Efix
Get Notified about Future Security Bulletins
References
Acknowledgement
Change History
04 Mar 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
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Document Information
Modified date:
04 March 2026
Initial Publish date:
04 March 2026
UID
ibm17262486