The SSH daemon must not allow compression or must only allow compression after successful authentication.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-35146r1_rule The SSH daemon must not allow compression or must only allow compression after successful authentication.

Vulnerability discussion

If compression is allowed in an SSH connection prior to authentication, vulnerabilities in the compression software could result in compromise of the system from an unauthenticated connection, potentially with root privileges.

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Fix text

Edit the SSH daemon configuration and add or edit the Compression setting value to no or delayed.

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