Security Bulletin: IBM® Db2® is vulnerable to an information disclosure as a result of a connected user having indirect read access to a table where they are not authorized to select from. (CVE-2021-38931)

Security Bulletin

Summary

Db2 is vulnerable to an information disclosure as a result of a connected user having indirect read access to a table where they are not authorized to select from.

Vulnerability Details

CVEID: CVE-2021-38931
DESCRIPTION: IBM Db2 for Linux, UNIX and Windows (includes DB2 Connect Server) is vulnerable to an information disclosure as a result of a connected user having indirect read access to a table where they are not authorized to select from.
CVSS Base score: 6.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/210418 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

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

IBM Db2 V10.5, V10.1 and V9.7 are not impacted.

Remediation/Fixes

Customers running any vulnerable fixpack level of an affected Program, v11.1 and V11.5, 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: V11.1.4 FP6, and V11.5.6. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

Release	Fixed in fix pack	APAR	Download URL
V11.1	TBD	IT38558	Special Build for V11.1.4 FP6: AIX 64-bit Linux 32-bit, x86-32 Linux 64-bit, x86-64 Linux 64-bit, POWER™ little endian Linux 64-bit, System z®, System z9® or zSeries® Solaris 64-bit, SPARC Windows 32-bit, x86 Windows 64-bit, x86
V11.5	11.5.7	IT38558	https://www.ibm.com/support/pages/node/6524304

Workarounds and Mitigations

Implementation of row and column access control (RCAC) can be used to resolve this vulnerability.
See here for details.

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Acknowledgement

IBM would like to thank Yuriy Symyuta and Max Nielsen at Spar Nord Bank for reporting this issue.

Change History

4 Jan 2022: New links provided for 11.1 Windows platforms. This is the same build used to resolve CVE-2021-4104
15 Dec 2021: A new link will be provided for 11.1 Windows platforms
08 Dec 2021: 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

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

Document Location

Worldwide

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Tips

Security Bulletin: IBM® Db2® is vulnerable to an information disclosure as a result of a connected user having indirect read access to a table where they are not authorized to select from. (CVE-2021-38931)