Security Bulletin: Potential Denial of Service security vulnerability in Rational Insight running on WAS or eWAS due to Java HashTable implementation vulnerability (CVE-2012-0193)

Security Bulletin

Summary

Products bundled with an embedded IBM WebSphere Application Server (eWAS) or IBM WebSphere Application Server (WAS) are subject to a potential security exposure due to the Java HashTable implementation which can result in a Denial of Service (DoS) exposure when using Web based applications such as IBM Rational Insight.

Vulnerability Details

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CVE ID: CVE-2012-0193

Description: IBM WebSphere Application Server (WAS) 6.0 through 6.0.2.43, 6.1 before 6.1.0.43, 7.0 before 7.0.0.23, and 8.0 before 8.0.0.3 computes hash values for form parameters without restricting the ability to trigger hash collisions predictably, which allows remote attackers to cause a denial of service (CPU consumption) by sending many crafted parameters.

Review security bulletin 1577532: Potential security vulnerability when using Web based applications on IBM WebSphere Application Server due to Java HashTable implementation vulnerability (PM53930/PM57565) for more details.

Affected Products and Versions

If your product was installed with the WebSphere Application Server or eWAS version 6.1 or 7.0 server that was shipped with RAM, you are impacted by a security vulnerability which can cause performance or denial of service (DoS) issues.

Remediation/Fixes

You are advised to read the instructions in this Interim Fix document linked below and update your application servers to correct this issue:

PM53930: Collisions in HashTable May Cause DoS Vulnerability

Workarounds and Mitigations

None

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References

Complete CVSS v2 Guide
On-line Calculator v2

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Acknowledgement

None

Change History

* 15 February 2012: Original copy 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

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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Tips

Security Bulletin: Potential Denial of Service security vulnerability in Rational Insight running on WAS or eWAS due to Java HashTable implementation vulnerability (CVE-2012-0193)