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Security Bulletin: IBM® Db2® is vulnerable to an information disclosure. (CVE-2020-4387)

Security Bulletin


Summary

IBM® Db2® could allow a local user to obtain sensitive information using a race condition of a symbolic link.

Vulnerability Details

CVEID:   CVE-2020-4387
DESCRIPTION:   IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) could allow a local user to obtain sensitive information using a race condition of a symbolic link.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/179269 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/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 editions on all platforms are 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, 11.1 FP5, and V11.5 GA. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.


ReleaseFixed in fix packAPARDownload URL
V9.7TBDIT32693Special 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


V10.1TBDIT32692Special 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

V10.5TBDIT32691Special 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

v11.1.4FP6

IT32690

Build for v11.1.4FP6

https://www.ibm.com/support/pages/node/6427871

V11.5TBDIT32689Build for V11.5.4 GA:

https://www.ibm.com/support/pages/node/6241724



Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

References

Off

Acknowledgement

The vulnerability was reported to IBM by Eddie Zhu, BEIJING DBSEC TECHNOLOGY CO., LTD.

Change History

10 March 2021:  Replaced Special Build urls with the 11.1.4FP6 url
10 December 2020: The URL for 10.5 Windows 64-bit build image 40160 was updated to the new build image 40479 due to a problem with db2level
                                        not being updated in some specific scenarios on Windows.
7 December 2020: The URL for 9.7 Windows 64-bit build image 40162 was updated to the new build image 40481 due to a problem with db2level
                                        not being updated in some specific scenarios on Windows.
26 November 2020: Windows image for 9.7 refreshed
9 October 2020: Linux/Unix images for 9.7 refreshed
18 August 2020: Windows images for 9.7 refreshed
30 June 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.

Disclaimer

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.

Document Location

Worldwide

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEPGG","label":"Db2 for Linux, UNIX and Windows"},"Component":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"}],"Version":"9.7,10.1,10.5,11.1,11.5","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
10 March 2021

UID

ibm16242336