Security Bulletin
Summary
The Db2 tool db2convert is affected by a buffer overflow vulnerability. As installed this tool does not run with elevated privileges (setuid) and when called directly the vulnerability does not lead to privilege escalation. However, if a customer’s own application or script runs with elevated privileges and executes db2convert, the vulnerability may lead to privilege escalation. This tool is not called by Db2 in such a manner. The vulnerability only exists for local users, it cannot be remotely exploited.
Vulnerability Details
CVEID: CVE-2018-1515
DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server), under specific or unusual conditions, could allow a local user to overflow a buffer which may result in a privilege escalation to the DB2 instance owner.
CVSS Base Score: 7.4
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/141624 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
All fix pack levels of IBM Db2 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 V11.1.3.3 iFix001, available for download from Fix Central.
Customers running any vulnerable fixpack level of an affected Program, V10.5, 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: V10.5 FP9. 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 |
| V10.5 | FP10 | IT24645 | https://www-01.ibm.com/support/docview.wss?uid=swg24045012 |
| V11.1.3.3 | iFix001 | IT24642 |
Workarounds and Mitigations
Customers can delete db2convert if not using this tool.
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References
Change History
May 22, 2018: Original Version Published.
July 11, 2018: Updated 10.5 version with a link to 10.5 FP10 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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Document Information
Modified date:
11 July 2018
UID
swg22016140