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Security Bulletin: IBM Connect:Direct for UNIX is Vulnerable to a Privilege Escalation Attack via its C/C++ API

Security Bulletin


Summary

IBM Sterling Connect:Direct for UNIX could allow a user who is authorized for limited Connect:Direct privileges to attack through a custom application written using the Connect:Direct for UNIX C/C++ API by replacing the system implementation of getuid() with a malicious implementation and gain unauthorized privilege to access to the Connect:Direct for UNIX Server.

Vulnerability Details

CVEID: CVE-2019-4529
DESCRIPTION: IBM Sterling Connect:Direct for UNIX could allow an authenticated attacker to replace the system implementation of getuid() with a malicious implementation allowing the user to gain unauthorized access to the CD UNIX Server through a custom application written using the CD UNIX C/C++ API.
CVSS Base Score: 7.5
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/165585 for the current score.
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM Sterling Connect:Direct for Unix 6.0.0

IBM Sterling Connect:Direct for Unix 4.3.0

IBM Sterling Connect:Direct for Unix 4.2.0

Remediation/Fixes

V.R.M.F

APAR Remediation/First Fix
6.0.0 IT27957 Apply 6.0.0.1.iFix006, available in cumulative iFix 6.0.0.1.008 on Fix Central
4.3.0 IT27957 Apply 4.3.0.1.iFix009, available in cumulative iFix 4.3.0.1.010 on Fix Central
4.2.0 IT27957 Apply 4.2.0.4.iFix122, available in cumulative Fix Pack 4.2.0.5 on Fix Central

For versions previous to 4.2.0, IBM recommends upgrading to a fixed, supported version of the product.

Workarounds and Mitigations

None

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Important Note

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References

Off

Change History

10 October 2019: Original version published

*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

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. "Affected Products and Versions" referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

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Document Information

Modified date:
24 July 2020

UID

ibm11074722