IBM Support

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

Get Notified about Future Security Bulletins

Important Note

IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSKTYY","label":"IBM Sterling Connect:Direct for UNIX"},"Component":"","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"4.2.0;4.3.0;6.0.0","Edition":"","Line of Business":{"code":"LOB59","label":"Sustainability Software"}}]

Document Information

Modified date:
24 July 2020

UID

ibm11074722