Security Bulletin: Multiple security vulnerabilities have been identified in IBM WebSphere Application Server shipped with IBM Rational ClearCase (CVE-2021-4104, CVE-2021-45046, CVE-2021-38951)

Summary

IBM WebSphere Application Server (WAS) is shipped as a component of IBM Rational ClearCase. Information about security vulnerabilities affecting WAS have been published in security bulletins.

Vulnerability Details

CVEID:CVE-2021-38951
**DESCRIPTION:**IBM WebSphere Application Server 7.0, 8.0, 8.5, and 9.0 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available CPU resources. IBM X-Force ID: 211405.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/211405 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-2021-4104
**DESCRIPTION:**Apache Log4j could allow a remote attacker to execute arbitrary code on the system, caused by the deserialization of untrusted data when the attacker has write access to the Log4j configuration. If the deployed application is configured to use JMSAppender, an attacker could exploit this vulnerability to execute arbitrary code on the system.
CVSS Base score: 8.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215048 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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

Remediation/Fixes

Refer to the following security bulletin(s) for vulnerability details and information about fixes addressed by IBM WebSphere Application Server (WAS) which is shipped with IBM Rational ClearCase.

IBM WebSphere Application Server versions 7.0, 8.0, 8.5, and 9.0.

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Security Bulletin: Multiple vulnerabilities in Apache log4j affect the IBM WebSphere Application Server and IBM WebSphere Application Server Liberty (CVE-2021-4104, CVE-2021-45046)

Security Bulletin: WebSphere Application Server is vulnerable to a Denial of Service (CVE-2021-38951)

ClearCase Versions

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Applying the fix

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8.0.0.x, 8.0.1.x, 9.0.0.x, 9.0.1.x, 9.0.2.x, 9.1.x|

1. Determine the WAS version used by your CCRC WAN server. Navigate to the CCRC profile directory (either the profile you specified when installing ClearCase, or <ccase-home>/common/ccrcprofile), then execute the script: bin/versionInfo.sh (UNIX) or bin\versionInfo.bat (Windows). The output includes a section “IBM WebSphere Application Server”. Make note of the version listed in this section. Check your installed version of IBM WebSphere Application Server against this bulletin’s list of vulnerable versions.
2. Identify the latest available fixes (per the bulletin(s) listed above) for the version of WAS used for CCRC WAN server.
3. Apply the appropriate WebSphere Application Server fix directly to your CCRC WAN server host. No ClearCase-specific steps are necessary.

For 8.0.x and earlier releases, IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

None