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Security Bulletin: IBM Sterling Connect:Direct for UNIX Allows a User with Sudo Access Restricted to Certain Connect:Direct Executable Files to Expand Access Beyond the Restriction (CVE-2018-1903)

Security Bulletin


UNIX system administrators may grant access to run certain executable files with expanded privilege via the sudo utility. Connect:Direct for UNIX has a vulnerability that could allow a user to escape this sudo executable file restriction and perform unauthorized commands with expanded privilege.

Vulnerability Details

CVEID: CVE-2018-1903
DESCRIPTION: IBM Sterling Connect:Direct for UNIX could allow a user with restricted sudo access on a system to manipulate CD UNIX to gain full sudo access.
CVSS Base Score: 6.7
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:H/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



APAR Remediation/First Fix
6.0.0 IT26865 Apply, available in cumulative iFix018 on Fix Central
4.3.0 IT26865 Apply, available in cumulative iFix029 on Fix Central
4.2.0 IT26865
Apply, available in cumulative iFix098 on Fix Central

For IBM Sterling Connect:Direct for Unix versions 4.1.0 and older, IBM recommends upgrading to a fixed, supported version of the product.

Workarounds and Mitigations


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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.


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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

29 March 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.


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.

Document information

More support for: Sterling Connect:Direct for UNIX

Component: --

Software version: 4.2.0, 4.3.0, 6.0.0

Operating system(s): AIX, HP-UX, Linux, Solaris

Reference #: 0875386

Modified date: 01 April 2019