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Security Bulletin: Format string vulnerability in IBM® Db2® tool db2support (CVE-2018-1566).

Security Bulletin


Db2 tool db2support is affected by format string vulnerability. As installed this tool does not run with elevated privileges (setuid) and when called directly the vulnerability does not lead to privilege escalation. However, if a customer’s own application or script runs with elevated privileges and executes db2support, the vulnerability may lead to privilege escalation. This tool is not called by Db2 in such a manner. The vulnerability only exists for local users, it cannot be remotely exploited.

Vulnerability Details

CVEID: CVE-2018-1566
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to execute arbitrary code due to a format string error.
CVSS Base Score: 8.4
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

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


The recommended solution is to apply the appropriate fix for this vulnerability.


The fix for DB2 release V10.5 is in V10.5 FP10 and V11.1 is in V11.1.3.3 iFix002, which are available for download from Fix Central.

Customers running any vulnerable fixpack level of an affected Program, V9.7 and V10.1 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: DB2 V9.7 FP11 and V10.1 FP6. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

Workarounds and Mitigations


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Change History

July 6, 2018: Original Version Published.
July 6, 2018: Db2 V10.1 Windows 32-bit download link added.
July 10, 2018: Db2 V9.7 Windows 32-bit and 64-bit download link added.
July 11, 2018: Updated 10.5 version with a link to 10.5 FP10 image.
August 7, 2018: Updated 11.1 version with a link to iFix002 image.

*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.


Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

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Document Information

Modified date:
07 August 2018