Aria Orchestrator "Run SSH command" workflow fails to connect to RHEL9 servers
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Aria Orchestrator "Run SSH command" workflow fails to connect to RHEL9 servers

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Article ID: 338598

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Updated On: 02-17-2025

Products

VMware Aria Suite

Issue/Introduction

Symptoms:
  • Run SSH command workflow fails to connect to RHEL 9 servers.
  • You see an error similar to:
    Unable to execute command: InternalError: Session.connect: java.io.IOException: End of IO Stream Read
    or
    Unable to execute command: InternalError: Session.connect: java.security.SignatureException: Signature length not correct: got 404 but was expecting 384

Environment

VMware Aria Automation Orchestrator 8.x

Cause

This issue is caused due to a change with default cryptographic policies in RHEL 9.

Resolution

Workaround:
  • Use the attached updated version of the SSH plugin to use Key Authentication
  • To workaround this issue, update the cryptographic policy to SHA1 on the affected RHEL9 server. For more information, see Redhat documentation.
     
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Additional Information

Impact/Risks: Enabling SHA-1 cryptographic policy weakens the security of the system.

Attachments

o11n-plugin-ssh-8.0.1+24140733.vmoapp get_app