Security Bulletin: Vulnerabilty in XMLC affects IBM® DB2® LUW (CVE-2016-0729, CVE-2016-4463)

Summary

IBM DB2 for LUW bundles a XMLC library that is affected by CVE-2016-0729. A remote, authenticated DB2 user could exploit this vulnerability by issuing a specially crafted statement. This may cause the DB2 server to terminate abnormally or execute arbitary code.

Vulnerability Details

CVE-ID: CVE-2016-0729
Description: Apache Xerces-C XML Parser library is vulnerable to a denial of service, caused by improper bounds checking during processing and error reporting. By sending specially crafted input documents, an attacker could exploit this vulnerability to cause the library to crash or possibly execute arbitrary code on the system.
CVSS Base Score: 7.3
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/111028 for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)

CVE-ID: CVE-2016-4463
Description: Apache Xerces-C XML Parser library is vulnerable to a denial of service, caused by a stack-based buffer overflow when parsing a deeply nested DTD. A remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base Score: 5.3
CVSS Temporal Score: https://exchange.xforce.ibmcloud.com/vulnerabilities/114596 for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

All fix pack levels of IBM DB2 V9.7, V10.1, V10.5 and V11.1 editions listed below and running on AIX, Linux, HP, Solaris or Windows are affected

IBM® DB2® Express Edition
IBM® DB2® Workgroup Server Edition
IBM® DB2® Enterprise Server Edition
IBM® DB2® Advanced Enterprise Server Edition
IBM® DB2® Advanced Workgroup Server Edition
IBM® DB2® Direct Advanced Edition
IBM® DB2® Direct Standard Edition
IBM® DB2® Connect™ Application Server Edition
IBM® DB2® Connect™ Enterprise Edition
IBM® DB2® Connect™ Unlimited Edition for System i®
IBM® DB2® Connect™ Unlimited Edition for System z®

The DB2 Connect products mentioned are affected only if a local database has been created.

Remediation/Fixes

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

FIX:

The fix for DB2 and DB2 Connect release is in V10.1 FP6, V10.5 FP8 and V11.1.1 FP1, available for download from Fix Central.

Customers running any vulnerable fixpack level of an affected Program, V9.7 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. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

Refer to the following chart to determine how to proceed to obtain a needed fixpack or special build.
*** NOTICE: The DB2 V9.7 AIX Universal install image available before October 13, 2016 has installation problems. The problem has been corrected and you can use the link in the table to download it.

Workarounds and Mitigations

None.