Security Bulletin: IBM® Db2® may be vulnerable to an Information Disclosure when using the LOAD utility as under certain circumstances the LOAD utility does not enforce directory restrictions. (CVE-2021-20373)

Security Bulletin

Summary

Db2 may be vulnerable to an Information Disclosure when using the LOAD utility as under certain circumstances the LOAD utility does not enforce directory restrictions.

Vulnerability Details

CVEID: CVE-2021-20373
DESCRIPTION: IBM Db2 9.7, 10.1, 10.5, 11.1, and 11.5 may be vulnerable to an Information Disclosure when using the LOAD utility as under certain circumstances the LOAD utility does not enforce directory restrictions. IBM X-Force ID: 199521.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/195521 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N)

Affected Products and Versions

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

Affected Product(s)	Version(s)	Applicable Editions
IBM® Db2®	9.7.0 - 9.7.11	Server
IBM® Db2®	10.1.0 - 10.1.6	Server
IBM® Db2®	10.5.0 - 10.5.11	Server
IBM® Db2®	11.1.4 - 11.1.4.6	Server
IBM® Db2®	11.5.0 - 11.5.7	Server

Remediation/Fixes

Customers running any vulnerable fixpack level of an affected Program, V9.7, V10.1, V10.5, 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: V9.7 FP11, V10.1 FP6, V10.5 FP11, 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
V9.7	TBD	IT37715	Special Build for V9.7 FP11: AIX 64-bit HP-UX 64-bit Linux 32-bit, x86-32 Linux 64-bit, x86-64 Linux 64-bit, POWER™ big endian Linux 64-bit, System z®, System z9® or zSeries® Solaris 64-bit, SPARC Solaris 64-bit, x86-64 Windows 32-bit, x86 Windows 64-bit, x86
V10.1	TBD	IT37714	Special Build for V10.1 FP6: AIX 64-bit HP-UX 64-bit Linux 32-bit, x86-32 Linux 64-bit, x86-64 Linux 64-bit, POWER™ big endian Linux 64-bit, System z®, System z9® or zSeries® Solaris 64-bit, SPARC Solaris 64-bit, x86-64 Windows 32-bit, x86 Windows 64-bit, x86
V10.5	TBD	IT37713	Special Build for V10.5 FP11: AIX 64-bit HP-UX 64-bit Linux 32-bit, x86-32 Linux 64-bit, x86-64 Linux 64-bit, POWER™ big endian Linux 64-bit, POWER™ little endian Linux 64-bit, System z®, System z9® or zSeries® Solaris 64-bit, SPARC Solaris 64-bit, x86-64 Windows 32-bit, x86 Windows 64-bit, x86 Inspur
V11.1	TBD	IT37658	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	IT37712	https://www.ibm.com/support/pages/node/6524304

IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.

Note: In addition to applying Special Build, registry variable DB2_LOAD_RESTRICTED_IO_PATH needs to be set to USE_EXTBL_LOCATION(v11.1.4.x and later) or one or more semi-colon separated paths.

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Acknowledgement

The vulnerability was reported to IBM by Qiguang Zhu.

Change History

12 Apr 2024: Updated affected versions to be more specific noting the fixpack number.
04 Apr 2024: Added note about DB2_LOAD_RESTRICTED_IO_PATH.
27 Jan 2022: Updated acknowledgement name and refreshed CVE details.
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
09 Dec 2021: Added links for 9.7 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® may be vulnerable to an Information Disclosure when using the LOAD utility as under certain circumstances the LOAD utility does not enforce directory restrictions. (CVE-2021-20373)