The SSH client must be configured to not use Cipher-Block Chaining (CBC) based ciphers.

From HP-UX 11.31 Security Technical Implementation Guide

Associated with IA controls: ECSC-1

Associated with: CCI-000366

SV-35193r1_rule The SSH client must be configured to not use Cipher-Block Chaining (CBC) based ciphers.

Vulnerability discussion

The CBC mode of encryption as implemented in the SSHv2 protocol is vulnerable to chosen plaintext attacks and must not be used.

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Fix text

Edit the configuration file and remove any ciphers other than those with the "aes" prefix and the "-ctr" suffix.

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