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Security Bulletin: ssh Server used in IBM WebSphere Application Server in IBM Cloud Supports Weak Key Exchange Algorithms

Security Bulletin


Summary

The sshd server provided with IBM WebSphere Application Server in IBM Cloud supports weak KEX and HostKey algorithms.

Vulnerability Details

Refer to the security bulletin(s) listed in the Remediation/Fixes section

Affected Products and Versions

Affected Product(s)Version(s)
WASaaS1.0.0

Remediation/Fixes

  • Log into the deployed VM as root
  • Issue the following commands
    • echo "" >> /etc/ssh/sshd_config
    • echo "kexalgorithms curve25519-sha256,curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256" >> /etc/ssh/sshd_config
    • systemctl restart sshd
More information is available in the following bulletin:

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

17 Aug 2020: 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


[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSKKCK","label":"IBM WebSphere Application Server in IBM Cloud"},"Component":"Not Applicable","Platform":[{"code":"PF016","label":"Linux"}],"Version":"Version Independent","Edition":"All Editions","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

More support for:
IBM WebSphere Application Server in IBM Cloud

Software version:
Version Independent

Operating system(s):
Linux

Document number:
6260739

Modified date:
17 August 2020

UID

ibm16260739

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