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Security Bulletin: Overly Permissive CORS Policy vulnerability found on IBM Security Secret Server (CVE-2019-4633)

Security Bulletin


Summary

This security bulletin describes plugging some potential, minor yet significant, information leaks by the IBM Security Secret Server. IBM Security Secret Server has an overly permissive CORS policy for login.

Vulnerability Details

CVEID:   CVE-2019-4633
DESCRIPTION:   IBM Security Secret Server could allow an attacker to obtain sensitive information due to an overly permissive CORS policy.
CVSS Base score: 3.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/170007 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Security Secret ServerAll

Remediation/Fixes

1) At the SecretServer installation folder, in the web-appsettings.config file under appSettings add:
 
        <add key="UseWebConfigCORS" value="true"></add>

 

2) At the SecretServer installation folder, in the web.config file under system.webServer/httpProtocol/customHeaders add:

 

        <add name="Access-Control-Allow-Origin" value="[customer URL here]" />
        <add name="Access-Control-Allow-Headers" value="Content-Type" />
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

03 Jan 2020: 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.

Disclaimer

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

Document Location

Worldwide

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Document Information

Modified date:
24 January 2020

UID

ibm11283200

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