CCE-95100-4| Platform: cpe:/o:debian:debian_linux:11.x, cpe:/o:ubuntu:ubuntu_linux:20.04, cpe:/o:ubuntu:ubuntu_linux:22.04, cpe:/o:ubuntu:ubuntu_linux:23.04 | Date: (C)2020-10-15 (M)2023-09-01 |
SSH supports two different and incompatible protocols: SSH1 and SSH2. SSH1 was the original protocol and was subject to security issues. SSH2 is more advanced and secure.
Rationale:
SSH v1 suffers from insecurities that do not affect SSH v2.
Fix:
Edit the /etc/ssh/sshd_config file to set the parameter as follows:
Protocol 2
Parameter:
[protocol_version_1/protocol_version_2]
Technical Mechanism:
Edit the /etc/ssh/sshd_config file to set the parameter as follows:
Protocol 2
| CCSS Severity: | CCSS Metrics: |
| CCSS Score : 9.8 | Attack Vector: NETWORK |
| Exploit Score: 3.9 | Attack Complexity: LOW |
| Impact Score: 5.9 | Privileges Required: NONE |
| Severity: CRITICAL | User Interaction: NONE |
| Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Scope: UNCHANGED |
| | Confidentiality: HIGH |
| | Integrity: HIGH |
| | Availability: HIGH |
| | |
References: | Resource Id | Reference |
|---|
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:92296 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:85172 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:87307 |
| SCAP Repo OVAL Definition | oval:org.secpod.oval:def:65961 |
