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s0ld13rrs0ld13rr/pentestcode/skills/services/ssh/SKILL.md

svc-ssh

Skill884 starsChanged 4 months agoMITView on GitHub

SSH version CVEs and post-auth tricks — regreSSHion, user enum, agent hijack. Use when SSH is open. Triggers - port 22, OpenSSH banner, regreSSHion CVE-2024-6387, CVE-2018-15473.

  • Reads credentials

We split this skill into the rules it gives an agent

2 rules. About 0 are common, 0 are distinctive, and 2 are very specific to this project.

  • ≈0

    Common · estimate

    Many files like this have a rule of this kind.

  • ≈0

    Distinctive · estimate

    This author's own choices. Worth a look.

  • 2

    Very specific

    Tied to their project's names, files or tools. Probably skip.

  • Common
  • Distinctive
  • Very specific
  1. Very specific:

    If another user has agent forwarding enabled: find /tmp -name "agent.*" → SSH_AUTH_SOCK=/tmp/agent.XXXX ssh other-target

    line 18
  2. Very specific:

    If only publickey → password brute is impossible, don't waste time on hydra.

    line 28

≈ “Common” is an estimate: at least 1 in 5 of the 308,232 skill files we read have a rule of the same kind, not the same words. “Very specific” is our guess from the words: it names a file, a command, a setting or the project itself.

Keep what fits and drop the rest. Your version, ready for your agents.
Files
SKILL.md

SSH — Version CVEs & Tricks

CVE-2024-6387 (regreSSHion)

OpenSSH 8.5–9.7 on glibc-based Linux. Race condition → unauthenticated RCE. Public PoCs exist but are slow/unreliable — confirm version, note as high-value finding.

CVE-2018-15473 (user enumeration)

OpenSSH <7.7. Timing-based username enumeration. ssh-audit TARGET or Metasploit auxiliary/scanner/ssh/ssh_enumusers. User list → password spray / AS-REP roast.

SSH agent forwarding hijack

If another user has agent forwarding enabled: find /tmp -name "agent.*" → SSH_AUTH_SOCK=/tmp/agent.XXXX ssh other-target

Post-auth pivot intel

  • ~/.ssh/config — other hosts, jump hosts, proxy configs
  • ~/.ssh/known_hosts — every host this user connected to
  • ~/.ssh/authorized_keys — who else has access (persistence opportunity)

Auth method check

ssh -o PreferredAuthentications=none TARGET reveals accepted methods. If only publickey → password brute is impossible, don't waste time on hydra.

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