Security Bulletin: IBM® Db2® could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. (CVE-2020-4739)

Security Bulletin

Summary

IBM Db2 on Windows could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. By placing a specially crafted file in a compromised folder, an attacker could exploit this vulnerability to execute arbitrary code on the system.

Vulnerability Details

CVEID: CVE-2020-4739
DESCRIPTION: IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 9.7, 10.1, 10.5, 11.1, and 11.5 could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. By placing a specially crafted file in a compromised folder, an attacker could exploit this vulnerability to execute arbitrary code on the system. IBM X-Force ID: 188149.
CVSS Base score: 7.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/188149 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:R/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, V11.1, and V11.5 editions on Windows are affected.

Linux/Unix platforms are not affected.

Remediation/Fixes

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, V11.1.4 FP6, and V11.5.5 FP1. 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	IT36404	Special Build for V9.7 FP11: Windows 32-bit, x86 Windows 64-bit, x86
V10.1	TBD	IT36403	Special Build for V10.1 FP6: Windows 32-bit, x86 Windows 64-bit, x86
V10.5	TBD	IT36402	Special Build for V10.5 FP11: Windows 32-bit, x86 Windows 64-bit, x86
V11.1	TBD	IT36400	Special Build for V11.1.4 FP6: Windows 32-bit, x86 Windows 64-bit, x86
V11.5	11.5.6	IT36279	https://www.ibm.com/support/pages/node/6465915

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Acknowledgement

The vulnerability was reported to IBM by Hou JingYi (@hjy79425575) of Qihoo 360 CERT.

Change History

28 July 2021: Added 10.1 links
23 June 2021: Updated links for 11.5 to the 11.5.6 release.
22 Apr 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® could allow a local authenticated attacker to execute arbitrary code on the system, caused by DLL search order hijacking vulnerability in Microsoft Windows client. (CVE-2020-4739)