Security Bulletin
Summary
The Edge Caching Proxy component of WebSphere Application Server may be vulnerable to HTTP response splitting attack. This is a separate install from WebSphere Application Server. You only need to apply this if you use the Edge Caching Proxy.
Vulnerability Details
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
- Version 9.0
- Version 8.5
- Version 8.0
- Version 7.0
Remediation/Fixes
Fix:
Apply an Interim Fix, Fix Pack or PTF containing APAR PI82587 if you use the Edge Caching Proxy component (separate install from WebSphere Application Server) 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
- Upgrade to 9.0.0.4 fix pack level then apply Interim Fix PI82587
- Apply Fix Pack 5 (9.0.0.5), or later.
For V8.5.0.0 through 8.5.5.12:
- Upgrade to 8.5.5.11 fix pack level then apply Interim Fix PI82587
- Upgrade to 8.5.5.12 fix pack level then apply Interim Fix PI82587
- Apply Fix Pack 13 (8.5.5.13), or later.
For V8.0.0.0 through 8.0.0.13:
- Apply Fix Pack 14 (8.0.0.14), or later.
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
- Apply Fix Pack 45 (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
Change History
09 October 2017: original document published
31 October 2017: corrected version 8
07 November 2017: added separate install information
26 August 2022: fixed broken link
*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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Document Information
Modified date:
26 August 2022
UID
swg22006815