Changes are coming to https://stigviewer.com.
Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey
The SSH daemon must be configured to not use Cipher-Block Chaining (CBC) ciphers.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22459 | GEN005506 | SV-46010r2_rule | Medium |
| Description |
|---|
| 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 |
|---|---|
| SUSE Linux Enterprise Server v11 for System z Security Technical Implementation Guide | 2018-09-19 |
Details
| Check Text ( C-43291r1_chk ) |
|---|
| 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) |
|---|
| 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 |