Security Bulletin: Multiple buffer overflow vulnerabilities exist in IBM® Db2® leading to privilege escalation (CVE-2018-1922, CVE-2018-1923, CVE-2018-1978, CVE-2018-1980, CVE-2019-4015, CVE-2019-4016).

Security Bulletin

Summary

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

Vulnerability Details

CVEID: CVE-2018-1922
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) is affected by buffer overflow vulnerability that can potentially result in arbitrary code execution
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/152858 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-1923
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) is affected by buffer overflow vulnerability that can potentially result in arbitrary code execution
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/152859 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-1978
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) is vulnerable to a buffer overflow, which could allow an authenticated local attacker to execute arbitrary code on the system as root.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/154069 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2018-1980
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) is vulnerable to a buffer overflow, which could allow an authenticated local attacker to execute arbitrary code on the system as root.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/154078 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2019-4015
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) is vulnerable to a buffer overflow, which could allow an authenticated local attacker to execute arbitrary code on the system as root.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/155893 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

CVEID: CVE-2019-4016
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) is vulnerable to a buffer overflow, which could allow an authenticated local attacker to execute arbitrary code on the system as root.
CVSS Base Score: 8.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/155894 for the current score
CVSS Environmental Score*: Undefined
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, and V11.1 editions on all platforms are affected.

Remediation/Fixes

The recommended solution is to apply the appropriate fix for this vulnerability.

FIX:

The fix for DB2 V11.1 is in V11.1.4.4 iFix001, available for download from Fix Central.

Customers running any vulnerable fixpack level of an affected Program, V9.7, V10.1, V10.5, and V11.1, 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: DB2 V9.7 FP11, V10.1 FP6, V10.5 FP10 and V11.1.4.4. 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	IT26860 IT26883 IT27150 IT27323 IT27417	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	IT26859 IT26882 IT27149 IT27322 IT27416	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	IT26858 IT26881 IT27129 IT27347 IT27302 IT27392	https://www.ibm.com/support/pages/node/3500079
V11.1	11.1.4.4 iFix001	IT26857 IT26878 IT27148 IT27364 IT27321 IT27415	https://www-01.ibm.com/support/docview.wss?uid=ibm1087475

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Acknowledgement

The vulnerabilities were reported to IBM by Eddie Zhu, BEIJING DBSEC TECHNOLOGY CO., LTD.

Change History

March 7, 2019: Original Version Published
March 11, 2019: Added links to images for V9.7 Windows 32-bit and 64-bit versions.
March 6, 2020: Updated 10.5 version with a link to 10.5 FP11 image.

*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.

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Tips

Security Bulletin: Multiple buffer overflow vulnerabilities exist in IBM® Db2® leading to privilege escalation (CVE-2018-1922, CVE-2018-1923, CVE-2018-1978, CVE-2018-1980, CVE-2019-4015, CVE-2019-4016).