ssh-penetration-testing
This skill should be used when the user asks to "pentest SSH services", "enumerate SSH configurations", "brute force SSH credentials", "exploit SSH vulnerabilities", "perform SSH tunneling", or "audit SSH security". It provides comprehensive SSH penetration testing methodologies and techniques.
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Critical
Do not install without reviewing
Security
4 findings: 2 critical severity, 1 high severity, 1 medium severity. Installing this skill is not recommended: please review these findings carefully if you do intend to do so.
E005: Suspicious download URL detected in skill instructions.
What this means
Detected a suspicious URL in the skill instructions that could lead the agent to download and execute malicious scripts or binaries. This includes links to executables from untrusted sources, typosquatting of official packages, URL shorteners that obscure the destination, and personal file hosting services.
Why it was flagged
These URLs expose web-accessible private SSH keys and a backup archive (sensitive credentials/exfiltrated data), which are highly suspicious as they can be used for unauthorized access or malware distribution.
E006: Malicious code pattern detected in skill scripts.
What this means
Detected high-risk code patterns in the skill content — including its prompts, tool definitions, and resources — such as data exfiltration, backdoors, remote code execution, credential theft, system compromise, supply chain attacks, and obfuscation techniques.
Why it was flagged
This skill content provides explicit, actionable instructions for credential theft, brute-force attacks, remote code execution (reverse shells), persistence (adding authorized_keys), and covert tunneling suitable for unauthorized access and data exfiltration.
W007: Insecure credential handling detected in skill instructions.
What this means
The skill handles credentials insecurely by requiring the agent to include secret values verbatim in its generated output. This exposes credentials in the agent’s context and conversation history, creating a risk of data exfiltration.
Why it was flagged
The skill hard-codes and prints plaintext credentials (e.g., example passwords in CLI commands and a Paramiko script that logs username:password), and shows adding an SSH key literal—patterns that require including secret values verbatim in outputs.
W013: Attempt to modify system services in skill instructions.
What this means
The skill prompts the agent to compromise the security or integrity of the user’s machine by modifying system-level services or configurations, such as obtaining elevated privileges, altering startup scripts, or changing system-wide settings.
Why it was flagged
The skill contains explicit instructions to modify system files and persist access (e.g., echoing a SOCKS entry into /etc/proxychains.conf and appending an SSH key to authorized_keys), and it encourages checking/using sudo, which pushes the agent to change the host's state and may require elevated privileges.
- Repository
- zebbern/claude-code-guide
- Commit
af7d491
- Audited
- Security analysis
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