Security Bulletin: Privilege escalation in IBM® Db2® tool db2cacpy (CVE-2018-1685).

Summary

A vulnerability exists in db2cacpy which could expose sensitive information to user.

Vulnerability Details

CVEID: CVE-2018-1685 DESCRIPTION: IBM DB2 for Linux, UNIX and Windows (includes DB2 Connect Server) contains a vulnerability in db2cacpy that could allow a local user to read any file on the system.
CVSS Base Score: 6.2
CVSS Temporal Score: See <https://exchange.xforce.ibmcloud.com/vulnerabilities/145502&gt; 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:N/A:N)

Affected Products and Versions

All fix pack levels of IBM Db2 V9.7, V10.1, V10.5, and V11.1 editions on all Unix-type platforms are affected. Windows platforms are not affected.

Remediation/Fixes

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

FIX:

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

Customers running any vulnerable fixpack level of an affected Program, V9.7, V10.1, and 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: DB2 V9.7 FP11, V10.1 FP6, and V10.5 FP10. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

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

V10.1 | TBD | IT25815 | 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

V10.5 | FP11 | IT25814 |

<https://www.ibm.com/support/pages/node/3500079&gt;

V11.1 | FP4 | IT25466 |

<http://www.ibm.com/support/docview.wss?uid=ibm10741687&gt;

Workarounds and Mitigations

The tool db2cacpy is deprecated from Db2 V10.1 onwards so the customer can delete ~/sqllib/adm/db2cacpy. The functionality is found inside the Configuration Assistant (db2ca) and Db2 control center utilities. Deleting this file will remove the ability to add ports into /etc/services when adding new databases for the Configuration Assistant.