Security Bulletin: IBM Security Key Lifecycle Manager is vulnerable to Incorrect Permission Assignment for Critical Resource (CVE-2018-1750)
IBM Security Key Lifecycle Manager specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors. In case of Windows operating system, all user accounts with access to the system will have read access to all the application backups created in the SKLM_DATA folder.
DESCRIPTION: IBM Tivoli Key Lifecycle Manager specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.
CVSS Base Score: 4.2
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/148511 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N)
Affected Products and Versions
IBM Security Key Lifecycle Manager: v3.0- 184.108.40.206
IBM Security Key Lifecycle Manager: v2.7- 220.127.116.11
IBM Security Key Lifecycle Manager: v2.6- 18.104.22.168
|IBM Security Key Lifecycle Manager||3.0- 22.214.171.124||3.0.0-ISS-SKLM-FP0002|
On LNUX servers, there is a sklmPermission.sh sklmPermissions.sh script provided from 3.0.0-ISS-SKLM-FP0002 onwards.
1) Execute the sklmPermission.sh script
2) Reboot system.
3) After every reboot for multimaster configuration, user needs to set following parameters:
sysctl -w kernel.msgmni=16384
sysctl -w kernel.sem="250 32000 100 1024"
Workarounds and Mitigations
For Windows server, as a workaround, windows users can change or remove the read access to all users except Administrator.
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IBM X-Force Ethical Hacking Team: Warren Moynihan, Jonathan Fitz-Gerald, John Zuccato, Rodney Ryan, Chris Shepherd, Dmitriy Beryoza
original document publish date - 28th September 2018.
*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.