Security Bulletin: WebSphere MQ is vulnerable to disclosing side channel information via discrepencies between valid and invalid PKCS#1 padding. ROBOT. (CVE-2018-1388)

Security Bulletin

Summary

WebSphere MQ is affected by the ROBOT vulnerability where it may disclose side channel information via discrepencies between valid and invalid PKCS#1 padding.

Vulnerability Details

CVEID: CVE-2018-1388
DESCRIPTION: IBM MQ is vulnerable to TLS implementations may disclose side channel information via discrepencies between valid and invalid PKCS#1 padding.
CVSS Base Score: 9.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/138212 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)

Affected Products and Versions

WebSphere MQ v7.0.1

Maintenance levels 7.0.1.0 - 7.0.1.14

Remediation/Fixes

WebSphere MQ v7.0.1

Contact WebSphere MQ support requesting a fix for APAR IJ03658

Workarounds and Mitigations

WebSphere MQ v7.0.1

Use the Alternative GSKit value to configure your Queue Manager to use GSKit version 8.

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References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

01 Feb 2018: 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.

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Tips

Security Bulletin: WebSphere MQ is vulnerable to disclosing side channel information via discrepencies between valid and invalid PKCS#1 padding. ROBOT. (CVE-2018-1388)