Security Bulletin: Information disclosure in IBM HTTP Server (CVE-2018-1388)

Security Bulletin

Summary

IBM HTTP Server Version 7 used by WebSphere Application Server 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: GSKit V7 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

This vulnerability affects the following versions and releases of IBM HTTP Server (powered by Apache) component in all editions of WebSphere Application Server and bundling products.

Version 7.0

Remediation/Fixes

For V7.0.0.0 through 7.0.0.43:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PI91913

--OR--
· Apply Fix Pack 7.0.0.45 or later.

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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.

References

Complete CVSS v2 Guide
On-line Calculator v2

Complete CVSS v3 Guide
On-line Calculator v3

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Change History

12 March 2018: original document 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: Information disclosure in IBM HTTP Server (CVE-2018-1388)