Security Bulletin: A denial of service vulnerability has been identified with Case Client component shipped with IBM Business Automation Workflow and IBM Case Manager (CVE-2019-12402)

Summary

Case Client component shipped with IBM Business Automation Workflow and IBM Case Manager is vulnerable to denial of service, caused by an error in the internal file name encoding algorithm with Apache Commons Compress. By persuading a victim to open specially crafted ZIP archive containing malicious input, a remote attacker could exploit this vulnerability to cause the application to enter into an infinite loop.

Vulnerability Details

CVE-ID: CVE-2019-12402
Description: Apache Commons Compress is vulnerable to a denial of service, caused by an error in the internal file name encoding algorithm. By persuading a victim to open specially crafted ZIP archive containing malicious input, a remote attacker could exploit this vulnerability to cause the application to enter into an infinite loop.
CVSS Base Score: 4.3
CVSS Temporal Score: <https://exchange.xforce.ibmcloud.com/vulnerabilities/165956&gt; for more information
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)

Affected Products and Versions

- IBM Case Manager V5.2.1

- IBM Case Manager V5.3CD

- IBM Business Automation Workflow V18.0.0.0 through V19.0.0.2

Remediation/Fixes

The recommended solution is to apply the Interim Fix (iFix) or Cumulative Fix (CF) containing APAR PJ45804 as soon as practical:

• IBM Business Automation Workflow
• [IBM Case Manager](<https://www-945.ibm.com/support/fixcentral/swg/selectFixes?parent=Enterprise Content Management&product=ibm/Information+Management/Case+Manager&release=5.3.3.0>)

For IBM Business Automation Workflow V18.0.0.0 through V19.0.0.2
· Upgrade to at least IBM Business Automation Workflow V18.0.0.1 as required by iFix and then apply iFix PJ45804
--OR–
· Apply cumulative fix Business Automation Workflow V19.0.0.3 (planned for end of Q4 2019)

For IBM Case Manager 5.3CD
· Upgrade to at least IBM 5.3.2 as required by iFix and then apply iFix that includes APAR PJ45804
--OR–
· Upgrade to Business Automation Workflow V19.0.0.3

IBM Case Manager V5.1.1, V5.2.0, and V5.2.1 are no longer in full support; IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

There are preventative methods for this denial of service vulnerability.
a) Disable the Case Package feature in case client users, or limit the Case Package feature to administrative roles
b) Parse and disallow adding of document titles with special characters with IBM FileNet Content Platform Engine controls.