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Security Bulletin: IBM® Db2® is vulnerable to a Denial of Service on Windows (CVE-2020-4642)

Security Bulletin


IBM Db2 for Windows (includes Db2 Connect Server) could allow local attacker to cause a denial of service inside the "Db2 Management Service".

Vulnerability Details

CVEID:   CVE-2020-4642
DESCRIPTION:   IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow local attacker to cause a denial of service inside the "DB2 Management Service".
CVSS Base score: 6.2
CVSS Temporal Score: See: for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

All fix pack levels of IBM Db2 V9.7, V10.1, V10.5, V11.1, and V11.5 on Windows are affected.

Linux and Unix are not vulnerable.


Customers running any vulnerable fixpack level of an affected Program can download the special build containing the interim fix for this issue from Fix Central. These special builds are available based on the most recent fixpack level for each impacted release: V9.7 FP11, V10.1 FP6, V10.5 FP11, V11.1 FP5, and V11.5.5. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

ReleaseFixed in fix packAPARDownload URL
V9.7TBDIT34317Special Build for V9.7 FP11:

Windows 32-bit, x86
Windows 64-bit, x86

V10.1TBDIT34316Special Build for V10.1 FP6:

Windows 32-bit, x86
Windows 64-bit, x86

V10.5TBDIT34315Special Build for V10.5 FP11:

Windows 32-bit, x86
Windows 64-bit, x86


V11.5TBDIT34294Special Build for V11.5.5:

Windows 32-bit, x86
Windows 64-bit, x86

Workarounds and Mitigations


Get Notified about Future Security Bulletins




This vulnerability was reported to IBM by Martin Rakhmanov

Change History

11 March 2021:  Replace urls for v9.7 Windows 32-bit, Windows 64-bit
10 March 2021:  Replaced Special Build urls with the 11.1.4FP6 url
17 February 2021: Windows 64-bit image withdrawn, a new build is pending
19 January 2021: Links for 9.7 Windows 32-bit updated.
18 January 2021: Links for 9.7 Windows 64-bit updated.  Links for 10.1 added
22 Dec 2020: 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.


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


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Document Information

Modified date:
11 March 2021