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Security Bulletin: Potential Denial of Service in IBM HTTP Server CVE-2014-0098

Security Bulletin


Summary

Potential Denial of Service in IBM HTTP Server for IBM WebSphere Application Server.

Vulnerability Details

CVEID: CVE-2014-0098
Description: IBM HTTP Server may be vulnerable to a denial of service, caused by certain cookies being logged in the access log. A remote attacker could exploit this vulnerability to cause the server process to hang or crash. This only affects users that have modified their configuration to add cookie logging.
CVSS Base Score: 5.0
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/91879 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:P)

Affected Products and Versions

This problem affects the IBM HTTP Server component in all editions of WebSphere Application Server and all products that bundle WebSphere Application Server:
· Version 8.5.5
· Version 8.5
· Version 8
· Version 7
· Version 6.1

Remediation/Fixes

The recommended solution is to apply the Fix Pack for each named product as soon as practical.

Fix:Apply a Fix Pack containing this APAR PI13028, as noted below:

For affected IBM HTTP Server for WebSphere Application Server:

For V8.5.0.0 through 8.5.5.1 Full Profile:

  • Upgrade to a miniumum Fix Pack Level 8.5.0.2
  • Apply Interim Fix PI13028
--OR--
  • Apply Fix Pack 8.5.5.3 or later.

For V8.0 through 8.0.0.8:
  • Upgrade to a minimum Fix Pack Level 8.0.0.6
  • Apply Interim Fix PI13028
--OR--
  • Apply Fix Pack 8.0.0.9 or later.

For V7.0.0.0 through 7.0.0.31:
  • Upgrade to a minimum Fix Pack Level 7.0.0.29
  • Apply Interim Fix PI13028
--OR--
  • Apply Fix Pack 7.0.0.33 or later.

For V6.1.0.0 through 6.1.0.47:
  • Ensure you are at Fix Pack 6.1.0.47 then apply Interim Fix PI13028

Workarounds and Mitigations

Do not log individual cookies. You may log the whole cookie header without being vulnerable.

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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

Related information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

15 May 2014: Original 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.

Document information

More support for: WebSphere Application Server
IBM HTTP Server

Software version: 6.1, 7.0, 8.0, 8.5, 8.5.5

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

Software edition: Base, Developer, Enterprise, Network Deployment

Reference #: 1667526

Modified date: 15 September 2014