Security Bulletin
Summary
There are Remote Attack Vulnerabilities in Apache Log4j (CVE-2021-45105, CVE-2021-45046, CVE-2021-44832) which is used by IBM Engineering Systems Design Rhapsody (RDM) components; Knowledge Center and Test Conductor for logging . The fix includes upgrade to Apache Log4j v2.17.1.
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)
CVEID: CVE-2021-44832
DESCRIPTION: Apache Log4j could allow a remote attacker with permission to modify the logging configuration file to execute arbitrary code on the system. By constructing a malicious configuration using a JDBC Appender with a data source referencing a JNDI URI , an attacker could exploit this vulnerability to execute remote code.
CVSS Base score: 6.6
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/216189 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
| Affected Product(s) | Version(s) |
| IBM Engineering Systems Design Rhapsody | 9.0, 9.0.1 |
| Rational Rhapsody | 8.4 |
Remediation/Fixes
IBM strongly recommends addressing the vulnerabilities now by taking the actions documented in this bulletin.
For IBM Engineering Systems Design Rhapsody follow the instructions to apply the following fixes:
1. The Knowledge Center component for a locally installed help server (KCCI) that is (optionally) installed and configured for the following products: IBM Engineering Systems Design Rhapsody Versions 8.4, 9.0, 9.0.1. Select the appropriate version link below and follow the instructions from the support page.
2. Next, For IBM Engineering Systems Design Rhapsody Versions 9.0, 9.0.1 you will need to also update the Test Conductor component. Click the link below for the affected version and follow the instructions from the support page.
Workarounds and Mitigations
None
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References
Change History
04 Jan 2022: Initial Publication
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
27 May 2022
UID
ibm16540566