## Summary

A vulnerability in Apache Tomcat affects the product’s management GUI, potentially allowing an attacker to cause a denial of service. The Command Line Interface is unaffected.

## Vulnerability Details

**CVEID: **[CVE-2021-42340]()
**DESCRIPTION: **Apache Tomcat is vulnerable to a denial of service, caused by a memory leak flaw in WebSocket connections. By sending a specially-crafted request using OutOfMemoryError, a remote attacker could exploit this vulnerability to cause a denial of service condition.
CVSS Base score: 7.5
CVSS Temporal Score: See: [ https://exchange.xforce.ibmcloud.com/vulnerabilities/211354]() for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

## Affected Products and Versions

Affected Product(s) | Version(s)
—|—
SAN Volume Controller and Storwize Family | 8.4

Versions 8.3.1 and earlier are not affected.

## Remediation/Fixes

IBM recommends that you fix this vulnerability by upgrading affected versions of IBM SAN Volume Controller, IBM Storwize V7000, IBM Storwize V5000 and V5100, IBM Storwize V5000E, IBM Spectrum Virtualize Software, IBM Spectrum Virtualize for Public Cloud, IBM FlashSystem V9000, IBM FlashSystem 9100 Family, IBM FlashSystem 9200, IBM FlashSystem 7200, IBM FlashSystem 5200 and IBM FlashSystem 5000 to the following code levels or higher:

8.4.0.6

8.4.2.1

[Latest IBM SAN Volume Controller Code]()
[Latest IBM Storwize V7000 Code]()
[Latest IBM Storwize V5000 and V5100 Code]()
[Latest IBM Storwize V5000E Code]()
[Latest IBM FlashSystem V9000 Code]()
[Latest IBM FlashSystem 9100 Family Code]( “” )
[Latest IBM FlashSystem 9200 Code]( “” )
[Latest IBM FlashSystem 7200 Code]( “” )
[Latest IBM FlashSystem 5000 and 5200 Code]( “” )
[Latest IBM Spectrum Virtualize Software]()
[Latest IBM Spectrum Virtualize for Public Cloud]()

For the Storage Nodes of IBM FlashSystem 900, please apply the fixes recommended in the [IBM FlashSystem security bulletin]() for this issue.

## Workarounds and Mitigations

None

## Get Notified about Future Security Bulletins

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### References

[Complete CVSS v3 Guide]( “Link resides outside of ibm.com” )
[On-line Calculator v3]( “Link resides outside of ibm.com” )

Off

## Related Information

[IBM Secure Engineering Web Portal]()
[IBM Product Security Incident Response Blog]()

## Acknowledgement

## Change History

17 Jan 2022: Initial Publication

*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. In addition to other efforts to address potential vulnerabilities, IBM periodically updates the record of components contained in our product offerings. As part of that effort, if IBM identifies previously unidentified packages in a product/service inventory, we address relevant vulnerabilities regardless of CVE date. Inclusion of an older CVEID does not demonstrate that the referenced product has been used by IBM since that date, nor that IBM was aware of a vulnerability as of that date. We are making clients aware of relevant vulnerabilities as we become aware of them. “Affected Products and Versions” referenced in IBM Security Bulletins are intended to be only products and versions that are supported by IBM and have not passed their end-of-support or warranty date. Thus, failure to reference unsupported or extended-support products and versions in this Security Bulletin does not constitute a determination by IBM that they are unaffected by the vulnerability. Reference to one or more unsupported versions in this Security Bulletin shall not create an obligation for IBM to provide fixes for any unsupported or extended-support products or versions.

## Document Location

Worldwide

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