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AUSCERT External Security Bulletin Redistribution
IBM Security Bulletin: Security vulnerability in the IBM
HTTP Server (CVE-2018-17199)
15 March 2019
AusCERT Security Bulletin Summary
Product: IBM WebSphere Application Server
Operating System: AIX
Impact/Access: Reduced Security -- Remote/Unauthenticated
CVE Names: CVE-2018-17199
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Security vulnerability in the IBM HTTP Server (CVE-2018-17199)
Product: 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
Reference #: 0869064
There is a vulnerability in the IBM HTTP Server used by WebSphere Application
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 https://exchange.xforce.ibmcloud.com/vulnerabilities/
156006 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.
o Version 9.0
For V188.8.131.52 through 184.108.40.206:
. Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH06010
. Apply Fix Pack 220.127.116.11 or later (targeted availability 2Q 2019).
Complete CVSS v3 Guide
On-line Calculator v3
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
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.
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