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Security Bulletin: CVE-2021-42340 Apache Tomcat is vulnerable to a denial of service, caused by a memory leak flaw in WebSocket connections.

Security Bulletin


Summary

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.

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)
UCD - IBM UrbanCode Deploy6.2.7.3
UCD - IBM UrbanCode Deploy6.2.7.4
UCD - IBM UrbanCode Deploy6.2.7.5
UCD - IBM UrbanCode Deploy6.2.7.6
UCD - IBM UrbanCode Deploy6.2.7.7
UCD - IBM UrbanCode Deploy6.2.7.8
UCD - IBM UrbanCode Deploy6.2.7.9
UCD - IBM UrbanCode Deploy6.2.7.10
UCD - IBM UrbanCode Deploy6.2.7.11
UCD - IBM UrbanCode Deploy6.2.7.12
UCD - IBM UrbanCode Deploy7.0.3.0
UCD - IBM UrbanCode Deploy7.0.3.1
UCD - IBM UrbanCode Deploy7.0.3.2
UCD - IBM UrbanCode Deploy7.0.3.3
UCD - IBM UrbanCode Deploy7.0.4.0
UCD - IBM UrbanCode Deploy7.0.4.1
UCD - IBM UrbanCode Deploy7.0.4.2
UCD - IBM UrbanCode Deploy7.0.5.0
UCD - IBM UrbanCode Deploy7.0.5.1
UCD - IBM UrbanCode Deploy7.0.5.2
UCD - IBM UrbanCode Deploy7.0.5.3
UCD - IBM UrbanCode Deploy7.0.5.4
UCD - IBM UrbanCode Deploy7.0.5.5
UCD - IBM UrbanCode Deploy7.0.5.6
UCD - IBM UrbanCode Deploy7.0.5.7
UCD - IBM UrbanCode Deploy7.1.0.0
UCD - IBM UrbanCode Deploy7.1.0.1
UCD - IBM UrbanCode Deploy7.1.0.2
UCD - IBM UrbanCode Deploy7.1.1.0
UCD - IBM UrbanCode Deploy7.1.1.1
UCD - IBM UrbanCode Deploy7.1.1.2
UCD - IBM UrbanCode Deploy7.1.2.1
UCD - IBM UrbanCode Deploy7.1.2.2
UCD - IBM UrbanCode Deploy7.1.2.3
UCD - IBM UrbanCode Deploy7.2.0.0
UCD - IBM UrbanCode Deploy7.2.0.1
UCD - IBM UrbanCode Deploy7.2.0.2
UCD - IBM UrbanCode Deploy7.2.1.0
UCD - IBM UrbanCode Deploy7.2.1.1

Remediation/Fixes

Upgrade to any of 6.2.7.13, 7.0.5.8, 7.1.2.4, 7.2.0.3 , 7.2.1.2

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Change History

14 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

Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.

Document Location

Worldwide

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Document Information

Modified date:
14 January 2022

UID

ibm16541054

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