Finding ID | Version | Rule ID | IA Controls | Severity |
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V-22459 | GEN005506 | SV-46010r2_rule | Medium |
Description |
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The Cipher-Block Chaining (CBC) mode of encryption as implemented in the SSHv2 protocol is vulnerable to chosen plain text attacks and must not be used. |
STIG | Date |
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SUSE Linux Enterprise Server v11 for System z | 2016-12-20 |
Check Text ( C-43291r1_chk ) |
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Check the SSH daemon configuration for allowed ciphers. # grep -i ciphers /etc/ssh/sshd_config | grep -v '^#' If no lines are returned, or the returned ciphers list contains any cipher ending with "cbc", this is a finding. |
Fix Text (F-39374r2_fix) |
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Edit the SSH daemon configuration and remove any ciphers ending with "cbc". If necessary, add a "Ciphers" line. Restart the SSH daemon. # /sbin/service sshd restart |