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AUSCERT External Security Bulletin Redistribution
ESB-2017.2534
Security Bulletin: WebSphere Application Server Edge Caching Proxy may be
vulnerable to HTTP response splitting (CVE-2017-1503)
10 October 2017
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM WebSphere Application Server
Publisher: IBM
Operating System: AIX
HP-UX
IBM i
Linux variants
Solaris
Windows
z/OS
Impact/Access: Cross-site Scripting -- Remote with User Interaction
Provide Misleading Information -- Remote with User Interaction
Access Confidential Data -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2017-1503
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=swg22006815
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Security Bulletin: WebSphere Application Server Edge Caching Proxy may be
vulnerable to HTTP response splitting (CVE-2017-1503)
Security Bulletin
Document information
More support for: WebSphere Application Server
Edge Component
Software version: 7.0, 8.0, 8.5, 9.0
Operating system(s): AIX, HP-UX, IBM i, Linux, Solaris, Windows, z/OS
Reference #: 2006815
Modified date: 09 October 2017
Summary
The Edge Caching Proxy component of WebSphere Application Server may be
vulnerable to HTTP response splitting attack.
Vulnerability Details
CVEID: CVE-2017-1503
DESCRIPTION: IBM WebSphere Application Server is vulnerable to HTTP response
splitting attacks. A remote attacker could exploit this vulnerability using
specially-crafted URL to cause the server to return a split response, once the
URL is clicked. This would allow the attacker to perform further attacks, such
as Web cache poisoning, cross-site scripting, and possibly obtain sensitive
information.
CVSS Base Score: 6.1
CVSS Temporal Score: See
https://exchange.xforce.ibmcloud.com/vulnerabilities/129578 for the current
score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)
Affected Products and Versions
This vulnerability affects the following versions and releases of IBM
WebSphere Application Server:
Version 9.0
Version 8.5
Version 8.0
Version 7.0
Remediation/Fixes
The recommended solution is to apply the Fix Pack or PTF for each named
product as soon as practical.
Fix:
Apply an Interim Fix, Fix Pack or PTF containing APAR PI82587 as noted below:
For IBM WebSphere Application Server For V9.0.0.0 through 9.0.0.4:
Upgrade to 9.0.0.3 fix pack level then apply Interim Fix PI82587
- -- OR
Upgrade to 9.0.0.4 fix pack level then apply Interim Fix PI82587
- -- OR
Apply Fix Pack 5 (9.0.0.5), or later (targeted availability 13 October 2017).
For V8.5.0.0 through 8.5.5.12:
Upgrade to 8.5.5.11 fix pack level then apply Interim Fix PI82587
- -- OR
Upgrade to 8.5.5.12 fix pack level then apply Interim Fix PI82587
- -- OR
Apply Fix Pack 13 (8.5.5.13), or later (targeted availability 5 February
2018).
For V8.0.0.0 through 8.0.0.1 3:
Upgrade to 8.0.0.12 fix pack level then apply Interim Fix PI82587
- -- OR
Upgrade to 8.0.0.13 fix pack level then apply Interim Fix PI82587
- -- OR
Apply Fix Pack 14 (8.0.0.14), or later (targeted availability 30 October
2017).
For V7.0.0.0 through 7.0.0.43:
Upgrade to a minimum of 7.0.0.41 fix pack level then apply Interim Fix PI82587
- -- OR
Apply Fix Pack 45 (7.0.0.45), or later (targeted availability 2Q 2018).
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 v3 Guide
On-line Calculator v3
Related information
IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog
Change History
09 October 2017: 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
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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