Security Bulletin: Multiple buffer overflow vulnerabilities exist in IBM® Db2® leading to privilege escalation (CVE-2020-4204).

Security Bulletin

Summary

Multiple buffer overflow vulnerabilities exist in IBM® Db2® leading to privilege escalation from an authenticated local user to root.

Vulnerability Details

CVEID: CVE-2020-4204
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) is vulnerable to a buffer overflow, caused by improper bounds checking which could allow a local attacker to execute arbitrary code on the system with root privileges.
CVSS Base score: 8.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/174960 for the current score.
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, V11.1, and V11.5 editions on all platforms are affected.

Remediation/Fixes

The fix for Db2 V10.5 is in V10.5.0.11, available for download from Fix Central.

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 FP10, 11.1 FP5, and V11.5 GA. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

Db2 9.7 Windows images published before June 29, 2020 have an issue where the Db2 installer may fail to initialize due to a signature verification error. Customers that have downloaded a special build before June 29, 2020 should delete the image and re-download with the updated links below.

Release	Fixed in fix pack	APAR	Download URL
V9.7	TBD	IT31641	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	IT31640	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	FP11	IT31639	https://www.ibm.com/support/pages/node/3500079
V11.1	TBD	IT31638	Special Build for V11.1 FP5: 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® Windows 32-bit, x86 Windows 64-bit, x86
V11.5	TBD	IT31637	Special Build for V11.5 GA: 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® Windows 32-bit, x86 Windows 64-bit, x86

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

18 Feb 2020: Initial Publication
02 Mar 2020: Added comment that V10.5 Windows special build requires VS 2013 libraries to be installed.
05 Mar 2020: Added the affected software editions
05 Mar 2020: Corrected special build links for all platforms
06 Mar 2020: Updated 10.5 version with a link to 10.5 FP11 image.
12 Mar 2020: Added links to V9.7 Windows 32-bit and 64-bit images.
29 June 2020: Updated links to V9.7 Windows 32-bit and 64-bit images to resolve an installer issue.
29 June 2020: Added links to V10.1 Windows 32-bit and 64-bit images.

*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: Multiple buffer overflow vulnerabilities exist in IBM® Db2® leading to privilege escalation (CVE-2020-4204).