Security Bulletin: IBM Db2® Warehouse 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® Warehouse is affected by multiple vulnerabilitiies (CVE-2021-45105 and CVE-2021-45046). This library is used by the Db2 Federation, Spark, Livy and IBM Spectrum Protect 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 mod and fix pack levels of IBM Db2 Warehouse V11.5 on all platforms are affected.

Remediation/Fixes

IBM strongly recommends addressing the vulnerability now by upgrading to the latest IBM Db2 Warehouse fixpack release containing the fix for this issue. These builds are available based on the most recent fixpack level of the V11.5.6.0 release. They can be applied to any affected fixpack level of the appropriate release to remediate this vulnerability.

v11.5.6.0-cn3-db2wh-linux
v11.5.6.0-cn3-db2wh-ppcle
v11.5.6.0-cn3-db2wh-s390x  

For information about how to update the fix packs above, see the following topic:

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

Workarounds and Mitigations

None