Security Bulletin: Multiple vulnerabilities in the Expat library affect IBM® Db2® Net Search Extender may lead to denial of service or arbitrary code execution.

Summary

Multiple vulnerabilities in the Expat library affect IBM® Db2® Net Search Extender may lead to denial of service or arbitrary code execution. These vulnerabilities have been addressed.

Vulnerability Details

CVEID:CVE-2022-43680
**DESCRIPTION:**libexpat is vulnerable to a denial of service, caused by a use-after free created by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations. A remote attacker could exploit this vulnerability to cause a denial of service.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/238951 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

CVEID:CVE-2022-40674
**DESCRIPTION:**libexpat could allow a remote attacker to execute arbitrary code on the system, caused by a use-after-free in the doContent function in xmlparse.c. An attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 9.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/236116 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/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 server editions on all platforms are affected.

IBM Db2 V11.5 is not affected.

Remediation/Fixes

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: V9.7 FP11, V10.1 FP6, V10.5 FP11, and V11.1.4 FP7. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

DT169673

DT172003

| 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

Please note: new Security fixes for V9.7 will no longer be provided after December 31, 2022 as it has reached end of support.

V10.1| TBD|

DT169673

DT172003

| 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

Please note: new Security fixes for V10.1 will no longer be provided after December 31, 2022 as it has reached end of support.

V10.5| TBD|

DT169673

DT172003

| Special Build for V10.5 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, POWER™ little 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
Inspur

V11.1| TBD|

DT169673

DT172003

| Special Build for V11.1.4 FP7:

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®
Solaris 64-bit, SPARC
Windows 32-bit, x86
Windows 64-bit, x86

IBM does not disclose key Db2 functionality nor replication steps for a vulnerability to avoid providing too much information to any potential malicious attacker. IBM does not want to enable a malicious attacker with sufficient knowledge to craft an exploit of the vulnerability.

Workarounds and Mitigations

None