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The SSH daemon must not allow compression or must only allow compression after successful authentication.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-22488 | GEN005539 | SV-40723r1_rule | ECSC-1 | Medium |
| Description |
|---|
| 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. |
| STIG | Date |
|---|---|
| AIX 5.3 Security Technical Implementation Guide | 2013-11-04 |
Details
| Check Text ( None ) |
|---|
| None |
| Fix Text (F-34582r1_fix) |
|---|
| Edit the /etc/ssh/sshd_config file and remove the Compression setting or set the Compression setting to "delayed" or "no". |