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Security Bulletin: Security vulnerability in the IBM HTTP Server (CVE-2018-17199)

Security Bulletin


There is a vulnerability in the IBM HTTP Server used by WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2018-17199
DESCRIPTION: Apache HTTP Server could allow a remote attacker to bypass security restrictions, caused by checking the session expiry time before decoding the session by mod_session. An attacker could exploit this vulnerability to ignore session expiry time and gain access to the application.
CVSS Base Score: 5.3
CVSS Temporal Score: See for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)

Affected Products and Versions

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

  • Version 9.0


For V9.0.0.0 through
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH06010
· Apply Fix Pack or later (targeted availability 2Q 2019).

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Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

13 March 2019: 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.


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.

Document information

More support for: WebSphere Application Server

Component: IBM HTTP Server

Software version: 9.0

Operating system(s): AIX, HP-UX, Linux, Solaris, Windows, z/OS

Software edition: Advanced, Base, Enterprise, Network Deployment, Single Server

Reference #: 0869064

Modified date: 13 March 2019