Check: PHTN-67-000090
VMware vSphere 6.7 Photon OS STIG:
PHTN-67-000090
(in versions v1 r6 through v1 r1)
Title
The Photon operating system must configure sshd to disallow compression of the encrypted session stream. (Cat II impact)
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.
Check Content
At the command line, execute the following command: # sshd -T|&grep -i Compression Expected result: Compression no If the output does not match the expected result, this is a finding.
Fix Text
Open /etc/ssh/sshd_config with a text editor. Ensure that the "Compression" line is uncommented and set to the following: Compression no At the command line, execute the following command: # service sshd reload
Additional Identifiers
Rule ID: SV-239161r675291_rule
Vulnerability ID: V-239161
Group Title: SRG-OS-000480-GPOS-00227
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-000366 |
The organization implements the security configuration settings. |
Controls
Number | Title |
---|---|
CM-6 |
Configuration Settings |