Security Bulletin:IBM® Db2® On Openshift and IBM® Db2® and Db2 Warehouse® on Cloud Pak for Data is vulnerable to denial of service and arbitrary code execution due to Apache Log4j (CVE-2021-45105 and CVE-2021-45046)

Summary

Apache Log4j open source library used by IBM® Db2® On Openshift and IBM® Db2® and Db2 Warehouse® on Cloud Pak for Data are affected by multiple vulnerabilities (CVE-2021-45105 and CVE-2021-45046). This library is used by the Db2 Federation and Db2 Graph feature as part of its logging infrastructure. The fix includes includes Apache Log4j v2.17.0.

Vulnerability Details

CVEID:CVE-2021-45105
**DESCRIPTION:**Apache Log4j is vulnerable to a denial of service, caused by the failure to protect from uncontrolled recursion from self-referential lookups. A remote attacker with control over Thread Context Map (MDC) input data could craft malicious input data that contains a recursive lookup to cause a StackOverflowError that will terminate the process. Note: The vulnerability is also called LOG4J2-3230.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215647 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-2021-45046
**DESCRIPTION:**Apache Log4j could result in remote code execution, caused by an incomplete fix of CVE-2021-44228 in certain non-default configurations. When the logging configuration uses a non-default Pattern Layout with a Context Lookup, an attacker with control over Thread Context Map (MDC) input data can craft malicious input data using a JNDI Lookup pattern to leak sensitive information and remote code execution in some environments and local code execution in all environments.
CVSS Base score: 9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215195 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H)

Affected Products and Versions

All platforms of the following IBM® Db2® On Openshift fix pack releases and IBM® Db2® and Db2 Warehouse® on Cloud Pak for Data refresh levels are affected:

v11.5.5.0 - v11.5.5.0-cn4
v11.5.5.1 - v11.5.5.1-cn3
v11.5.6.0 - v11.5.6.0-cn5
v11.5.7.0

IBM® Db2® and Db2 Warehouse® on Cloud Pak for Data|

v3.5 through refresh 9
v4.0 through refresh 4

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by upgrading to the latest IBM Db2 On Openshift or the IBM Db2 and Db2 Warehouse on Cloud Pak for Data refresh release containing the fix for this issue. These builds are available based on the most recent fixpack level of the V11.5.7 release and the Cloud Pak for Data v3.5 refresh 9, 4.0 refresh 4 release. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

Please note: If the affected release is any refresh level of Cloud Pak for Data 3.5, it is strongly recommended to upgrade to Cloud Pak for Data 4.0, then apply the latest refresh release

v11.5.5.1-cn4

v11.5.7.0-cn1

|

<https://www.ibm.com/docs/en/db2/11.5?topic=1156-upgrading-updating&gt;

IBM® Db2® and Db2 Warehouse® on Cloud Pak for Data|

v3.5 refresh 10

v4.0 refresh 5

|

<https://www.ibm.com/docs/en/cloud-paks/cp-data/4.0?topic=upgrading&gt;

Workarounds and Mitigations

None