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Security Bulletin: Privilege Escalation in Notes System Diagnostic Service of both IBM Notes and Domino (CVE-2018-1771)

Security Bulletin


IBM Notes and Domino (on Windows only) contain a privilege escalation vulnerability. By crafting a command line sent via the shared memory IPC, the Notes System Diagnostic (NSD) service can be tricked into executing a malicious dll chosen by the attacker. IBM addresses this vulnerability in the fix below.

Vulnerability Details

CVEID: CVE-2018-1771

DESCRIPTION: IBM Notes and Domino could allow an attacker to execute commands on the system by triggering a buffer overflow in the parsing of command line arguments passed to nsd.exe.
CVSS Base Score: 8.4
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Products and Versions

IBM Domino 9.0.1 through 9.0.1 FP10 IF4

IBM Domino 9.0 through 9.0 IF4

IBM Notes 9.0.1 through 9.0.1 FP10 IF5

IBM Notes 9.0 through 9.0 IF4

Please note that IBM Notes and Domino 10 no longer permit running NSD as a service so are not vulnerable to this attack.



Version Link
IBM Domino 9.0.1 FP10IF5 Please see this Interim Fix Technote for download links to Domino 901FP10IF5
IBM Notes Standard 9.0.1 FP10IF6 Fix Central ID Notes_901FP10IF6_W32_Standard
IBM Notes Basic 9.0.1 FP10IF6 Fix Central ID Notes_901FP10IF6_W32_Basic

For earlier releases, IBM recommends upgrading to a fixed, supported release.  However, customers who remain on Notes and Domino 9.0  may open a Service Request with IBM Support referencing SPR  #EPORB3HQ6K for a custom hotfix.

Note this is fixed in Notes/Domino 10.0.

Workarounds and Mitigations

Do not run NSD as a Windows Service.

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog


This vulnerability was reported to IBM by Lasse Trolle Borup of Langkjaer Cyber Defence

Change History

30 Nov 2018: Initial Publication

*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.

Cross reference information
Product Component Platform Version Edition
IBM Notes Notes System Diagnostic Service Windows All Versions

Document information

More support for: IBM Domino

Component: Notes System Diagnostic (NSD)

Software version: Domino 9.0, Domino 9.0.1

Operating system(s): Windows

Reference #: 0743405

Modified date: 18 December 2018